☆ 4.7 Article

Star-spots and magnetism: testing the activity paradigm in the Pleiades and M67

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

相关参考文献

注意：仅列出部分参考文献，下载原文获取全部文献信息。

Article Astronomy & Astrophysics

Unresolved Binaries in the Intermediate Mass Range in the Pleiades Star Cluster*

Alina A. Malofeeva et al.

Summary: The identification of binary stars in resolved stellar populations is challenging, but it can be estimated effectively using the photometric diagram constructed with pseudocolors. In the Pleiades star cluster, the binary star ratio is between 0.54 and 0.70, while the ratio of systems with a multiplicity of more than two is between 0.10 and 0.14. The distribution of the component mass ratio follows a power law, and there are expected to be a large number of brown dwarfs among secondary components with mass below 0.5 times solar mass.

ASTRONOMICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Stellar and substellar companions from Gaia EDR3 Proper-motion anomaly and resolved common proper-motion pairs

Pierre Kervella et al.

Summary: The multiplicity survey is significantly improved by using a combination of the PMa, CPM, and RUWE indicators, which enhances the exhaustivity of companion detection and improves accuracy. The detection of CPM companions for bright stars provides a useful proxy for estimating their distance with higher accuracy than the HIPPARCOS method.

ASTRONOMY & ASTROPHYSICS (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Observationally Constraining the Starspot Properties of Magnetically Active M67 Sub-subgiant S1063

Natalie M. Gosnell et al.

Summary: Our understanding of the impact of magnetic activity on stellar evolution is expanding as we uncover new findings. In this study, we focused on S1063, a prototypical sub-subgiant in the open cluster M67, and used a novel technique to analyze starspots over a multiyear time frame. The results show that the spot filling factor of S1063 ranged from 20% to 45% over four years, with an average of 30%. These findings suggest that sub-subgiants, including S1063, are magnetically active spotted stars, similar to RS CVn systems.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Age Spreads and Systematics in Lambda Orionis with Gaia DR2 and the SPOTS Tracks

Lyra Cao et al.

Summary: In this paper, we investigate the robustness of age measurements, age spreads, and stellar models in young pre-main-sequence stars. By studying the lambda Orionis cluster within the Orion star-forming complex, using Gaia data and star-by-star dereddening methods, we find that incorporating the structural impact of starspots or magnetic fields significantly changes the cluster age. We also conclude that star-by-star dereddening methods provide a smaller age spread compared to techniques using uniform extinction, indicating a potentially long star formation timescale for the lambda Orionis cluster.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Activity and Rotation of Nearby Field M Dwarfs in the TESS Southern Continuous Viewing Zone

Francys Anthony et al.

Summary: This study investigates the evolution of magnetism in late-type dwarfs and finds that late-type M dwarfs remain active for longer periods of time. The study also explores the relationship between rotation periods and magnetic activity.

ASTRONOMICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Magnetism, rotation, and nonthermal emission in cool stars Average magnetic field measurements in 292 M dwarfs

A. Reiners et al.

Summary: This article reports measurements of surface-average magnetic fields in 292 M dwarfs using radiative transfer calculations. The study reveals a relation between average field strength and Rossby number, resembling the rotation-activity relation. The authors also find close relations between magnetic flux and nonthermal coronal X-ray emission, chromospheric H alpha, and Ca H&K emission.

ASTRONOMY & ASTROPHYSICS (2022)

添加到收藏夹

Article Astronomy & Astrophysics

The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-Ray Activity Relation in Praesepe and the Hyades

Alejandro Nunez et al.

Summary: X-ray observations of low-mass stars in open clusters provide essential insights into the dependence of magnetic activity on stellar properties and their evolution. This study presents an updated analysis of the rotation-X-ray activity relation in the Praesepe and Hyades clusters, based on updated membership catalogs and collected X-ray detections. The results reveal important findings regarding the saturation of X-ray activity, the relation between Rossby number and X-ray luminosity, and the coronal parameters of binary and single cluster members.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey

Diogo Souto et al.

Summary: Individual chemical abundances for 14 elements are derived for a sample of M dwarfs using high-resolution, near-infrared H-band spectra. The study finds good agreement between M dwarfs in binary systems and their warmer primary stars, indicating that M dwarfs can be used to calibrate empirical relationships. However, there is a systematic offset when comparing the results with the APOGEE Stellar Parameter and Chemical Abundances Pipeline. The APOGEE spectra can be used to examine Galactic chemical evolution using large samples of selected M dwarfs.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Revealing the Field Sub-subgiant Population Using a Catalog of Active Giant Stars and Gaia EDR3

Emily M. Leiner et al.

Summary: Sub-subgiant stars (SSGs) are found below the subgiant and/or red giant branches in star clusters, and they are thought to result from rapid rotation and magnetic field inhibition of convection. This study uses data from the field to identify SSG candidates among active giant binaries (RS CVns), and finds a significant expansion in the number of known SSGs. The presence of SSGs among RS CVn systems suggests that they are a normal phase of evolution, rather than rare occurrences in dense star clusters.

ASTROPHYSICAL JOURNAL (2022)

添加到收藏夹

Article Astronomy & Astrophysics

The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data

Abdurro'uf et al.

Summary: This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys (SDSS). It includes the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, the MaNGA Stellar Library, and the Apache Point Observatory Galactic Evolution Experiment 2 survey. In addition, it presents 25 new or updated value-added catalogs. This paper concludes the release of SDSS-IV survey data and mentions the ongoing observations for the next phase.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

添加到收藏夹

Article Astronomy & Astrophysics

The Gaia-ESO survey: constraining evolutionary models and ages for young low mass stars with measurements of lithium depletion and rotation

A. S. Binks et al.

Summary: A growing concern has emerged regarding the discrepancies between standard stellar models and observations of pre-main sequence stars in clusters. In this study, researchers tested different models, including those with surface magnetic fields and cool starspots, and found that magnetic models provide better fit for the color-magnitude diagrams and lithium depletion patterns. The study also revealed a correlation between rotation periods and the brightness and lithium depletion of stars.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Final Targeting Strategy for the Sloan Digital Sky Survey IV Apache Point Observatory Galactic Evolution Experiment 2 North Survey

Rachael L. Beaton et al.

Summary: The paper presents updates and additions to the initial targeting strategy for APOGEE-2N, with modifications made through Ancillary Science Programs and Bright Time Extension. These measures allowed changes to the main survey strategy, inclusion of new programs in response to scientific discoveries, and expansions of existing programs for enhanced scientific success.

ASTRONOMICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

A detailed understanding of the rotation-activity relationship using the 300 Myr old open cluster NGC3532

D. J. Fritzewski et al.

Summary: The study of chromospheric activity and rotation periods in the young open cluster NGC3532 reveals a relationship between activity morphology and color, demonstrating mass-dependent activity patterns. Furthermore, a new population of low-activity stars among early M dwarfs is identified, leading to the construction of an enhanced color-period diagram.

ASTRONOMY & ASTROPHYSICS (2021)

添加到收藏夹

Article Astronomy & Astrophysics

The IGRINS YSO Survey. I. Stellar Parameters of Pre-main-sequence Stars in Taurus-Auriga

Ricardo Lopez-Valdivia et al.

Summary: The study provides fundamental parameters for 110 canonical K- and M-type Taurus-Auriga young stellar objects, using high-resolution spectra to determine effective temperature, surface gravity, magnetic-field strength, and projected rotational velocity. When considering magnetic field, systematic offsets in parameters were found, and the average log g differed between Class II and Class III objects. The classification of YSOs correlates with age, but there are exceptions with unexplained evolutionary histories.

ASTROPHYSICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682). II. The Spectroscopic Binary Population

Aaron M. Geller et al.

Summary: The paper presents and analyzes 120 spectroscopic binary and triple cluster members of the old open cluster M67 (NGC 2682). Based on observations of 1296 stars, the study focuses on main-sequence binaries and their orbital characteristics and mass distributions.

ASTRONOMICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

The APOGEE Data Release 16 Spectral Line List

Verne V. Smith et al.

Summary: The updated H-band spectral-line list adopted by APOGEE for SDSS-IV DR16 includes both atomic and molecular lines, with adjustments made using standard stars. Compared to previous versions, DR16 features more molecular and atomic lines, as well as measurable lines from heavy elements.

ASTRONOMICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Chromospheric Activity of Periodic Variable Stars Based on the LAMOST Low- and Medium-resolution Spectral Survey

Liu Long et al.

Summary: By analyzing spectral data, this study found that the activity fraction of stars with later spectral type decreases significantly as the absolute Galactic height increases. Moreover, at the same absolute Galactic height, the activity fractions in eclipsing binaries are higher than those in single stars. Additionally, the power-law index of rapid rotators shows an increasing trend from F- to K-type stars, and angular momentum and magnetic momentum are positively correlated.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2021)

添加到收藏夹

Article Astronomy & Astrophysics

The surface magnetic activity of the weak-line T Tauri stars TWA 7 and TWA 25

B. A. Nicholson et al.

Summary: In this study, spectropolarimetric observations of low-mass weak-line T Tauri stars TWA 25 and TWA 7 were analyzed, which revealed predominantly toroidal and non-axisymmetric surface magnetic fields for both stars. Surface brightness distributions were reconstructed to filter out activity-induced radial velocity variations, ruling out the presence of close-in giant planets for both stars. Longitudinal magnetic field measurements were shown to be useful in identifying activity-induced radial velocity variations.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Mapping Stellar Surfaces. II. An Interpretable Gaussian Process Model for Light Curves

Rodrigo Luger et al.

Summary: The use of Gaussian processes for modeling astronomical time series data sets has become popular due to their ease of use and flexibility. However, they are less useful when the starspot signal is of primary interest, in which case explicit modeling of individual starspots is preferred. The closed-form expression derived in this study allows for robust inference of physical parameters from light curves, with implications for understanding stellar variability, magnetic activity, and exoplanet searches.

ASTRONOMICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Mapping Stellar Surfaces. I. Degeneracies in the Rotational Light-curve Problem

Rodrigo Luger et al.

Summary: This paper discusses the issue of non-uniqueness in inferring stellar surface properties from rotational light curves, and proposes ensemble analysis as a powerful data-driven alternative to common priors. The study aims to enable statistically robust inferences about stellar surface properties by developing novel algorithms and tools for the analysis of stellar light curves and spectral time series.

ASTRONOMICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Suppression of lithium depletion in young low-mass stars from fast rotation

T. Constantino et al.

Summary: Researchers utilized rotating 1D stellar evolution models to study the evolution of stars, incorporating modifications to the temperature gradient in convection zones and a criterion for convective instability inspired by rotating 3D hydrodynamical simulations. By suppressing convection and modifying the temperature gradient, they were able to simulate lithium depletion in rapidly rotating stars, matching observations of lithium spread in young open clusters.

ASTRONOMY & ASTROPHYSICS (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Brightness Fluctuation Spectra of Sun-like Stars. I. The Mid-frequency Continuum

Timothy M. Brown et al.

Summary: The study found that Sun-like stars in the Pleiades cluster exhibit brightness fluctuations on timescales between 1 hour and 1 day, with the fluctuation decreasing rapidly with the increase of the Rossby number.

ASTROPHYSICAL JOURNAL (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Surface Rotation and Photometric Activity for Kepler Targets. II. G and F Main-sequence Stars and Cool Subgiant Stars

A. R. G. Santos et al.

Summary: The study analyzed Kepler data of 132,921 main-sequence F and G stars and late subgiant stars, identifying rotation-period candidates and selecting reliable rotation periods using a machine-learning algorithm. The research also found that hotter stars generally rotate faster and that the photometric activity of main-sequence G stars varies with increasing effective temperature.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3

Keivan G. Stassun et al.

Summary: Analyses of parallaxes observed by the Gaia satellite have shown significant improvements in systematics over time, with global systematics in parallaxes no longer statistically significant for a sample of benchmark eclipsing binaries. The Renormalized Unit Weight Error (RUWE) statistic is highly sensitive to unresolved companions and photocenter motion of binaries, suggesting that slightly elevated RUWE values may indicate unresolved binaries and can predict photocenter motion accurately.

ASTROPHYSICAL JOURNAL LETTERS (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Unresolved stellar companions with Gaia DR2 astrometry

Vasily Belokurov et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

添加到收藏夹

Article Astronomy & Astrophysics

The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra

Romina Ahumada et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2020)

添加到收藏夹

Article Astronomy & Astrophysics

APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South

Henrik Jonsson et al.

ASTRONOMICAL JOURNAL (2020)

添加到收藏夹

Article Astronomy & Astrophysics

Orbital Parameter Determination for Wide Stellar Binary Systems in the Age of Gaia

Logan A. Pearce et al.

ASTROPHYSICAL JOURNAL (2020)

添加到收藏夹

Article Astronomy & Astrophysics

The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones for Testing the Effects of Starspots on Structure and Colors

Garrett Somers et al.

ASTROPHYSICAL JOURNAL (2020)

添加到收藏夹

Article Astronomy & Astrophysics

A Relationship between Stellar Age and Spot Coverage

Brett M. Morris

ASTROPHYSICAL JOURNAL (2020)

添加到收藏夹

Article Astronomy & Astrophysics

Extended halo of NGC 2682 (M 67) from Gaia DR2

R. Carrera et al.

ASTRONOMY & ASTROPHYSICS (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Age Determination in Upper Scorpius with Eclipsing Binaries

Trevor J. David et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Rapid Rotation in the Kepler Field: Not a Single Star Phenomenon

Gregory V. A. Simonian et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Estimating Magnetic Filling Factors from Zeeman-Doppler Magnetograms

Victor See et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Surface Rotation and Photometric Activity for Kepler Targets. I. M and K Main-sequence Stars

A. R. G. Santos et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Masses and Implications for Ages of Low-mass Pre-main-sequence Stars in Taurus and Ophiuchus

M. Simon et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. II. Atomic Diffusion in M67 Stars

Diogo Souto et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Blue Lurkers: Hidden Blue Stragglers on the M67 Main Sequence Identified from Their Kepler/K2 Rotation Periods

Emily Leiner et al.

ASTROPHYSICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Signatures of unresolved binaries in stellar spectra: implications for spectral fittingSignatures of unresolved binaries in stellar spectra: implications for spectral fitting

Kareem El-Badry et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The lithium-rotation connection in the 125 Myr-old Pleiades cluster

J. Bouvier et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The astrometric solution

L. Lindegren et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Stellar activity with LAMOST - II. Chromospheric activity in open clusters

Xiang-Song Fang et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The stellar rotation-activity relationship in fully convective M dwarfs

Nicholas J. Wright et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The lithium-rotation connection in the 125 Myr-old Pleiades cluster

J. Bouvier et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The astrometric solution

L. Lindegren et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The surface magnetic activity of the weak-line T Tauri stars TWA 9A and V1095 Sco

B. A. Nicholson et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

添加到收藏夹

Article Astronomy & Astrophysics

A Machine-learning-based Investigation of the Open Cluster M67

Xinhua Gao

ASTROPHYSICAL JOURNAL (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. I. Signatures of Diffusion in the Open Cluster M67

Diogo Souto et al.

ASTROPHYSICAL JOURNAL (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Enhanced Stellar Activity for Slow Antisolar Differential Rotation

Axel Brandenburg et al.

ASTROPHYSICAL JOURNAL LETTERS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

The Ca II infrared triplet's performance as an activity indicator compared to Ca II H and K Empirical relations to convert Ca II infrared triplet measurements to common activity indices

J. Martin et al.

ASTRONOMY & ASTROPHYSICS (2017)

添加到收藏夹

Article Astronomy & Astrophysics

The magnetic strip(s) in the advanced phases of stellar evolution Theoretical convective turnover timescale and Rossby number for low-and intermediate-mass stars up to the AGB at various metallicities

C. Charbonnel et al.

ASTRONOMY & ASTROPHYSICS (2017)

添加到收藏夹

Article Astronomy & Astrophysics

THE H alpha EMISSION OF NEARBY M DWARFS AND ITS RELATION TO STELLAR ROTATION

Elisabeth R. Newton et al.

ASTROPHYSICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

The Apache Point Observatory Galactic Evolution Experiment (APOGEE)

Steven R. Majewski et al.

ASTRONOMICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

Revised Catalog of GALEX Ultraviolet Sources. I. The All-Sky Survey: GUVcat_AIS

Luciana Bianchi et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2017)

添加到收藏夹

Article Astronomy & Astrophysics

On the Origin of Sub-subgiant Stars. III. Formation Frequencies

Aaron M. Geller et al.

ASTROPHYSICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

On the Origin of Sub-subgiant Stars. II. Binary Mass Transfer, Envelope Stripping, and Magnetic Activity

Emily Leiner et al.

ASTROPHYSICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

On the Origin of Sub-subgiant Stars. I. Demographics

Aaron M. Geller et al.

ASTROPHYSICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

A Measurement of Radius Inflation in the Pleiades and Its Relation to Rotation and Lithium Depletion

Garrett Somers et al.

ASTRONOMICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

Placing the Spotted T Tauri Star LkCa 4 on an HR Diagram

Michael A. Gully-Santiago et al.

ASTROPHYSICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

Supersaturation and activity-rotation relation in PMS stars: the young cluster h Persei

C. Argiroffi et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

The Gaia-ESO Survey: Stellar radii in the young open clusters NGC 2264, NGC 2547, and NGC 2516

R. J. Jackson et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Magnetic inhibition of convection and the fundamental properties of low-mass stars III. A consistent 10 Myr age for the Upper Scorpius OB association

Gregory A. Feiden

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

The Gaia mission

T. Prusti et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Stellar activity with LAMOST - I. Spot configuration in Pleiades

Xiang-Song Fang et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

添加到收藏夹

Article Astronomy & Astrophysics

The evolution of surface magnetic fields in young solar-type stars - I. The first 250 Myr

C. P. Folsom et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Supersaturation and activity-rotation relation in PMS stars: the young cluster h Persei

C. Argiroffi et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

The Gaia-ESO Survey: Stellar radii in the young open clusters NGC 2264, NGC 2547, and NGC 2516

R. J. Jackson et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Magnetic inhibition of convection and the fundamental properties of low-mass stars III. A consistent 10 Myr age for the Upper Scorpius OB association

Gregory A. Feiden

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

The Gaia mission

T. Prusti et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

ASPCAP: THE APOGEE STELLAR PARAMETER AND CHEMICAL ABUNDANCES PIPELINE

Ana E. Garcia Perez et al.

ASTRONOMICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

ROTATION PERIODS FOR COOL STARS IN THE 4 Gyr OLD OPEN CLUSTER M67, THE SOLAR-STELLAR CONNECTION, AND THE APPLICABILITY OF GYROCHRONOLOGY TO AT LEAST SOLAR AGE

Sydney A. Barnes et al.

ASTROPHYSICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

THE CHEMICAL HOMOGENEITY OF OPEN CLUSTERS

Jo Bovy

ASTROPHYSICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

ROTATION IN THE PLEIADES WITH K2. III. SPECULATIONS ON ORIGINS AND EVOLUTION

John Stauffer et al.

ASTRONOMICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

ROTATION IN THE PLEIADES WITH K2. II. MULTIPERIOD STARS

L. M. Rebull et al.

ASTRONOMICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

ROTATION IN THE PLEIADES WITH K2. I. DATA AND FIRST RESULTS

L. M. Rebull et al.

ASTRONOMICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Constraints to the magnetospheric properties of T Tauri stars - II. The Mg II ultraviolet feature

Fatima Lopez-Martinez et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2015)

添加到收藏夹

Article Astronomy & Astrophysics

REEXAMINING THE LITHIUM DEPLETION BOUNDARY IN THE PLEIADES AND THE INFERRED AGE OF THE CLUSTER

S. E. Dahm

ASTROPHYSICAL JOURNAL (2015)

添加到收藏夹

Article Astronomy & Astrophysics

CONSTRUCTING A FLEXIBLE LIKELIHOOD FUNCTION FOR SPECTROSCOPIC INFERENCE

Ian Czekala et al.

ASTROPHYSICAL JOURNAL (2015)

添加到收藏夹

Article Astronomy & Astrophysics

OLDER AND COLDER: THE IMPACT OF STARSPOTS ON PRE-MAIN-SEQUENCE STELLAR EVOLUTION

Garrett Somers et al.

ASTROPHYSICAL JOURNAL (2015)

添加到收藏夹

Article Astronomy & Astrophysics

A TALE OF TWO ANOMALIES: DEPLETION, DISPERSION, AND THE CONNECTION BETWEEN THE STELLAR LITHIUM SPREAD AND INFLATED RADII ON THE PRE-MAIN SEQUENCE

Garrett Somers et al.

ASTROPHYSICAL JOURNAL (2014)

添加到收藏夹

Article Astronomy & Astrophysics

Classical T Tauri stars: magnetic fields, coronae and star-disc interactions

C. P. Johnstone et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

添加到收藏夹

Article Astronomy & Astrophysics

Modelling the magnetic activity and filtering radial velocity curves of young Suns : the weak-line T Tauri star LkCa 4

J. -F. Donati et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

添加到收藏夹

Article Astronomy & Astrophysics

Stellar magnetism: empirical trends with age and rotation

A. A. Vidotto et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

添加到收藏夹

Article Astronomy & Astrophysics

IN-SYNC I: HOMOGENEOUS STELLAR PARAMETERS FROM HIGH-RESOLUTION APOGEE SPECTRA FOR THOUSANDS OF PRE-MAIN SEQUENCE STARS

Michiel Cottaar et al.

ASTROPHYSICAL JOURNAL (2014)

添加到收藏夹

Article Astronomy & Astrophysics

A new extensive library of PHOENIX stellar atmospheres and synthetic spectra

T. -O. Husser et al.

ASTRONOMY & ASTROPHYSICS (2013)

添加到收藏夹

Article Astronomy & Astrophysics

FAST STAR, SLOW STAR; OLD STAR, YOUNG STAR: SUBGIANT ROTATION AS A POPULATION AND STELLAR PHYSICS DIAGNOSTIC

Jennifer L. van Saders et al.

ASTROPHYSICAL JOURNAL (2013)

添加到收藏夹

Article Astronomy & Astrophysics

INTRINSIC COLORS, TEMPERATURES, AND BOLOMETRIC CORRECTIONS OF PRE-MAIN-SEQUENCE STARS

Mark J. Pecaut et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2013)

添加到收藏夹

Article Astronomy & Astrophysics

On the interpolation of model atmospheres and high-resolution synthetic stellar spectra

Sz. Meszaros et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2013)

添加到收藏夹

Article Astronomy & Astrophysics

emcee: The MCMC Hammer

Daniel Foreman-Mackey et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC (2013)

添加到收藏夹

Article Astronomy & Astrophysics

Lithium in M 67: From the main sequence to the red giant branch

G. Pace et al.

ASTRONOMY & ASTROPHYSICS (2012)

添加到收藏夹

Article Astronomy & Astrophysics

THE STELLAR-ACTIVITY-ROTATION RELATIONSHIP AND THE EVOLUTION OF STELLAR DYNAMOS

Nicholas J. Wright et al.

ASTROPHYSICAL JOURNAL (2011)

添加到收藏夹

Article Astronomy & Astrophysics

Investigating coronal saturation and supersaturation in fast-rotating M-dwarf stars

R. D. Jeffries et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2011)

添加到收藏夹

Article Astronomy & Astrophysics

Theoretical values of convective turnover times and Rossby numbers for solar-like, pre-main sequence stars

N. R. Landin et al.

ASTRONOMY & ASTROPHYSICS (2010)

添加到收藏夹

Article Astronomy & Astrophysics

Chromospheric activity among fast-rotating M dwarfs in the open cluster NGC 2516

R. J. Jackson et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2010)

添加到收藏夹

Article Astronomy & Astrophysics

THE METALLICITY OF THE PLEIADES

David R. Soderblom et al.

ASTRONOMICAL JOURNAL (2009)

添加到收藏夹

Article Astronomy & Astrophysics

A FIRST LOOK AT ROTATION IN INACTIVE LATE-TYPE M DWARFS

Andrew A. West et al.

ASTROPHYSICAL JOURNAL (2009)

添加到收藏夹

Article Astronomy & Astrophysics

GALEX Ultraviolet Observations of Stellar Variability in the Hyades and Pleiades Clusters

Stanley E. Browne et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC (2009)

添加到收藏夹

Article Astronomy & Astrophysics

Ground-based CCD astrometry with wide-field imagers - II. A star catalog for m 67: WFI@2.2 m MPG/ESO astrometry, FLAMES @ VLT radial velocities

R. K. S. Yadav et al.

ASTRONOMY & ASTROPHYSICS (2008)

添加到收藏夹

Article Astronomy & Astrophysics

The magnetic fields of classical T Tauri stars

Christopher M. Johns-Krull

ASTROPHYSICAL JOURNAL (2007)

添加到收藏夹

Article Astronomy & Astrophysics

A survey of chromospheric activity in the solar-type stars in the open cluster M67

Mark S. Giampapa et al.

ASTROPHYSICAL JOURNAL (2006)

添加到收藏夹

Article Astronomy & Astrophysics

The Two Micron All Sky Survey (2MASS)

MF Skrutskie et al.

ASTRONOMICAL JOURNAL (2006)

添加到收藏夹

Article Astronomy & Astrophysics

Observations of magnetic fields on T Tauri stars

JA Valenti et al.

ASTROPHYSICS AND SPACE SCIENCE (2004)

添加到收藏夹

Article Astronomy & Astrophysics

XMM-Newton and the Pleiades -: I.: Bright coronal sources and the X-ray emission from intermediate-type stars

KR Briggs et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2003)

添加到收藏夹

Article Astronomy & Astrophysics

Why are the K dwarfs in the Pleiades so blue?

JR Stauffer et al.

ASTRONOMICAL JOURNAL (2003)

添加到收藏夹

Article Astronomy & Astrophysics

The Pleiades reflection nebula. I. Ultraviolet, optical, and far-infrared imaging photometry

SJ Gibson et al.

ASTROPHYSICAL JOURNAL (2003)

添加到收藏夹

Article Astronomy & Astrophysics

The stellar activity-rotation relationship revisited: Dependence of saturated and non-saturated X-ray emission regimes on stellar mass for late-type dwarfs

N Pizzolato et al.

ASTRONOMY & ASTROPHYSICS (2003)

添加到收藏夹

Article Computer Science, Software Engineering

UOBYQA: unconstrained optimization by quadratic approximation

MJD Powell

MATHEMATICAL PROGRAMMING (2002)

添加到收藏夹

Article Astronomy & Astrophysics

Observational constraints on the formation and evolution of binary stars

RJ White et al.

ASTROPHYSICAL JOURNAL (2001)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.