Related references
Note: Only part of the references are listed.
Article
Astronomy & Astrophysics
Christopher C. Lovell et al.
Summary: The distribution of dark matter halo masses can be accurately predicted in the ACDM cosmology, and the presence of a single massive halo or galaxy at a particular redshift can be used to test the cosmological model. However, recent observational determinations of galaxy masses at high redshift show a >3 sigma tension with the ACDM model, suggesting either a discrepancy or unaccounted uncertainties in the mass or redshift estimates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Hakim Atek et al.
Summary: One of the main goals of the JWST is to study the first galaxies in the Universe. Through a systematic photometric analysis, we have discovered two galaxy candidates at z similar to 16, only 250 million years after the big bang. We have also identified candidates at z similar to 12 and z similar to 9-11, demonstrating the capabilities of JWST to uncover photometric candidates at very high redshifts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
N. J. Adams et al.
Summary: We conduct a search for ultra-high-redshift galaxies (z > 9) using new post-launch calibrations and identify four candidate galaxies, including one at z = 11.5 and a possible pair of galaxies. However, the recovery rate for these candidates is low, with many being assigned lower redshifts in our work. Our analysis reveals evidence of Balmer-breaks and extreme emission lines, indicating advanced or very young stellar populations depending on the cause of the excess. The resolved structures of these early galaxies show a mixture of light concentration levels, with exceptionally small sizes (<0.5 kpc).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Lily Whitler et al.
Summary: With JWST, new opportunities to study the evolution of galaxies in the early Universe are emerging. The study uses JWST to constrain the ages of UV-bright galaxies at z similar to 8.5-11 and investigates the implications for z similar to 15 star formation. The results suggest an evolution towards larger specific star formation rates at early times, but also a significant decline in the number density of bright galaxies between z similar to 8.5-11 and z similar to 15.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Fergus Cullen et al.
Summary: We study the rest-frame ultraviolet (UV) continuum slopes (beta) of galaxies at redshifts 8 < z < 16 (z = 10) using JWST ERO and ERS NIRCam imaging and ground-based near-infrared imaging. The results show that the UV colors of galaxies at z > 8 are, on average, no bluer than the bluest galaxies in the local universe.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
C. T. Donnan et al.
Summary: We analyze JWST ERO and ERS NIRCam imaging in combination with ground-based near-infrared imaging to measure the evolving galaxy UV luminosity function and estimate the UV luminosity density and cosmic star formation rate density at high redshifts. Our results confirm a double power law description of the high-redshift LF and show a gradual decline up to z≈15. We also identify 47 new high-redshift galaxy candidates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
S. Mascia et al.
Summary: Following a combined analysis of JWST-NIRSpec and NIRCam data, we found that the gravitationally lensed galaxies in the Abell 2744 cluster field share similar characteristics with low-redshift LyC leakers, such as low masses, blue UV spectral slopes, compact sizes, and high [OIII]/[OII] flux ratios. By indirectly inferring the fraction of escaping ionizing photons, we determined that over 80% of the galaxies have predicted f(esc) values larger than 0.05, indicating their classification as leakers. The average predicted f(esc) value of our sample is 0.12, suggesting a significant contribution to cosmic reionization from similar galaxies at z >= 6.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Jeyhan S. Kartaltepe et al.
Astrophysical Journal Letters
(2023)
Article
Astronomy & Astrophysics
Tiger Yu-Yang Hsiao et al.
Summary: MACS0647-JD is a triply lensed galaxy similar to 11 that was originally discovered with the Hubble Space Telescope. Its three lensed images are magnified by factors of 8, 5, and 2, and are brighter than other galaxies discovered at similar redshifts with JWST. New JWST imaging reveals that MACS0647-JD consists of two merging galaxies or stellar complexes within a single galaxy. The larger component is very blue and likely has no dust, while the smaller component is older with mild dust extinction. Observations with the JWST Near Infrared Spectrograph in 2023 will provide more information about these magnified distant galaxies in the early universe.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Steven L. Finkelstein et al.
Summary: We conducted an investigation into the first 500 million years of galaxy evolution using the CEERS survey. By analyzing the CEERS NIRCam imaging data, we identified a sample of 26 galaxy candidates at z similar to 9-16, suggesting that the number density of galaxies at this redshift range remains relatively constant. These findings highlight the potential of JWST to discover more ultrahigh-redshift galaxies in the future.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Takahiro Morishita et al.
Summary: We used JWST NIRSpec to confirm the existence of a protocluster behind the galaxy cluster Abell 2744 at a redshift of 7.88 (A2744-z7p9OD). Seven galaxies were found within a projected radius of 60 kpc, and although they reside in an overdensity, their Ly alpha emission is not strong.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Seiji Fujimoto et al.
Summary: In this study, we present JWST NIRSpec spectroscopy of 11 galaxy candidates with photometric redshifts of z similar or equal to 9 - 13 and M-UV is an element of [ -21, -18]. We confirm emission line redshifts for 7 of these galaxies at z = 7.762-8.998 using spectra at similar to 1-5 mu m. The high confirmation rate of similar or equal to 90% for the z similar or equal to 9 photometric candidates validates the classical dropout selection from NIRCam photometry.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Multidisciplinary Sciences
Ivo Labbe et al.
Summary: Using early release observations from the James Webb Space Telescope, we have identified six candidate massive galaxies, including one with a possible stellar mass of 10^11 solar masses, within the first 750 million years of cosmic history. These findings suggest that the stellar mass density in massive galaxies may be higher than previously anticipated.
Article
Astronomy & Astrophysics
B. E. Robertson et al.
Summary: Surveys with the JWST have found candidate galaxies in the first 400 Myr of cosmic time, which may be more massive and abundant than previously thought. However, without confirmed distances, their properties remain uncertain.
Article
Astronomy & Astrophysics
Michael Boylan-Kolchin
Summary: Early data from the James Webb Space Telescope (JWST) show that high-redshift galaxy candidates have unexpectedly high stellar masses, posing a concern regarding their consistency with the standard CDM cosmological model. The mass function of dark matter haloes limits the number and stellar mass density of galaxies more massive than a certain stellar mass at any epoch, and the most massive galaxy candidates at z approximately 7-10 observed by JWST push the limits, indicating unresolved issues with galaxy properties derived from observations and the formation of galaxies in the CDM model or within the standard cosmology itself.
Article
Astronomy & Astrophysics
Emma Curtis-Lake et al.
Summary: As part of the JWST Advanced Deep Extragalactic Survey (JADES), NIRSpec has confirmed spectroscopically four young and metal-poor galaxies at redshift 10.3-13.2, from an early epoch of galaxy formation. Spectroscopic confirmation and analysis of four galaxies unambiguously detected at redshift 10.3 <= z <= 13.2 demonstrate the rapid emergence of the first generations of galaxies at cosmic dawn.
Article
Astronomy & Astrophysics
J. M. Diego et al.
Summary: The first data from the JWST on El Gordo cluster confirm 23 known multiply lensed image families and identify 8 new members. Based on these families, a lens model is derived and used to identify 37 additional families, including 28 entirely new systems. The geometric redshifts determined from the model agree well with spectroscopic or photometric redshifts available for comparison.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Mauro Stefanon et al.
Summary: We present the deepest constraints yet on the median rest-UV+optical spectral energy distribution (SED) of z ~ 10 galaxies. The SED analysis indicates that these galaxies have very young stellar populations, with most stars forming within the last ~160 Myr. The presence of a nebular continuum in these galaxies remains uncertain due to large uncertainties in the SED analysis.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Jorge A. Zavala et al.
Summary: Lyman-break galaxy (LBG) candidates at z greater than or similar to 10 have been identified in James Webb Space Telescope (JWST)/NIRCam observations. However, we have found that dust-enshrouded star-forming galaxies at lower redshifts may mimic the near-infrared colors of z > 10 LBGs, potentially contaminating LBG candidate samples.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
N. Leethochawalit et al.
Summary: This study presents the first determination of galaxy properties at 7 < z < 9 based on broadband imaging data from the James Webb Space Telescope/NIRCam. Thirteen galaxies with high signal-to-noise ratio were identified using dropout and photometric redshift selection. The physical properties of these galaxies, including their mass and age, were characterized using a Bayesian spectral energy distribution fitting method. The results demonstrate the potential of JWST in unveiling unprecedented details of galaxy formation in the early universe.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Haojing Yan et al.
Summary: On July 13, 2022, NASA released the initial set of science-grade data obtained by the long-awaited James Webb Space Telescope (JWST) Early Release Observations (ERO), which marks the beginning of a new era in astronomy. The JWST allows the study of the early universe beyond the redshift boundary of z approximately 11 imposed by the Hubble Space Telescope (HST). By using JWST's NIRCam, scientists were able to identify 87 candidate objects at high redshifts, z > 11, which is unexpected and requires further investigation.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Ryan Endsley et al.
Summary: Using CEERS JWST/NIRCam data, 116 UV-faint galaxies at z ~ 6.5–8 were characterized and found to mainly consist of young, low-mass stellar populations without extremely high stellar masses. The galaxies have higher specific star formation rates (sSFRs), implying high ionizing efficiency, but there is no significant increase in [O III] + H beta equivalent widths as the UV luminosity decreases, indicating low metallicities or possible photon escape fractions and bursty star formation histories. Additionally, a subset of very dusty galaxies at ~0.5L(UV)* was identified.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Pablo G. Perez-Gonzalez et al.
Summary: This study presents the ultraviolet luminosity function and the cosmic star formation rate density at 8 < z < 13, derived from deep NIRCam observations. By selecting and comparing 44 galaxy candidates, it is found that the increase in star formation rate density is slower than predicted by models, with a peak around 350 Myr after the Big Bang. These results are important for understanding the evolution of high-redshift galaxies and early galaxy formation in the universe.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
R. Kannan et al.
Summary: The THESAN project introduces large volume simulations that model the intergalactic medium during reionization and the characteristics of galaxies responsible for it. They find that different reionization models result in varied bubble size distributions, which can be observed through 21 cm radio signals.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Yuichi Harikane et al.
Summary: We present two bright galaxy candidates at z similar to 12-13 identified in our H-dropout Lyman break selection. Our results indicate little evolution in the abundance of bright galaxies from z similar to 4 to 13.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Sandro Tacchella et al.
Summary: We conducted a detailed stellar population analysis of 11 bright galaxies at z = 9-11 and used a flexible Bayesian spectral energy distribution (SED) fitting code to study their chemical enrichment and growth of stellar mass. Our results show the impact of different priors on the analysis and how well we can break degeneracies between various parameters using only UV to optical wavelength data. The correlation between dust attenuation, stellar ages, metallicity, and emission lines was explored using this approach.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Steven L. Finkelstein et al.
Summary: This study presents the results from a new search for candidate galaxies at redshift 8.5-11, discovered during the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS). By using photometric-redshift selection and detailed vetting procedures, the researchers identified 11 candidate galaxies, three of which are reported here for the first time. The study sheds light on the star formation activity and galaxy evolution during this epoch.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
P. Dayal et al.
Summary: This article presents the inclusion of metal and dust enrichment into a semi-analytic model of galaxy formation to explain the dust content of 13 LBGs detected at z similar or equal to 7. The study finds that the dust mass in galaxies is influenced by Type II supernova dust production, astration, shock destruction, and ejection in outflows, while grain growth plays a minor role. The model predicts a dust-to-stellar mass ratio and a UV-to-total star formation rate relation that align with observations. However, there are two systems that show significantly higher dust-to-stellar mass ratios, suggesting alternative solutions are needed.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Stephen M. Wilkins et al.
Summary: JWST is expected to expand the redshift frontier to z > 10 and is predicted to discover hundreds of galaxies in its first year alone, surpassing the current known number. Using simulations, the physical and observational properties of these high-redshift galaxies accessible to JWST have been predicted. While there are large observational uncertainties, the predictions are broadly consistent with current observational constraints on the luminosity function and UV continuum slope.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
R. J. Bouwens et al.
Summary: The Reionization Era Bright Emission Line Survey (REBELS) is an ALMA Large Program that aims to identify and characterize luminous star-forming galaxies in the z > 6.5 universe. By scanning 40 UV-selected galaxies, REBELS has discovered bright emission lines and dust-continuum emission. These findings triple the number of known bright ISM-cooling lines at z > 6.5 and demonstrate ALMA's efficiency as a redshift machine.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
N. Laporte et al.
Summary: This study focuses on the investigation of galaxy protoclusters at z>=6 using data from the James Webb Space Telescope. A protocluster with significant mass and several similar galaxies were identified. The findings provide valuable insights into the process of cosmic reionisation.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Marco Castellano et al.
Summary: In this study, we present the results of a search for galaxy candidates with redshifts around z=9-15 using deep seven-band NIRCam imaging from the GLASS-JWST Early Release Science Program. We identified several candidates using different versions of the Lyman-break technique and obtained their photometric redshifts. These candidates include two bright galaxies with redshifts greater than z=10, which is unexpected given the survey volume.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Massimo Pascale et al.
Summary: The first deep field images from the James Webb Space Telescope (JWST) reveal new lensed images at uncharted infrared wavelengths, with unprecedented depth and resolution. These images provide opportunities for detailed research on the redshift, chemical abundances, and gas dynamics of distant galaxies. The study also found an Einstein cross candidate and evidence of past dynamical disturbances.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Michael W. W. Topping et al.
Summary: This paper presents a search for reionization-era galaxies with very blue UV colors using JWST/NIRCam imaging. The discovered galaxies exhibit low metallicity and significant ionizing photon escape, suggesting that low-metallicity stellar populations may be common in dwarf galaxies at z > 7.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Rohan P. Naidu et al.
Summary: Researchers have used JWST/NIRCam to search for bright galaxies in the last unexplored epoch of the universe (around a few hundred million years ago with z > 10). They have identified two candidate galaxies, which show spectral features suggesting they may have formed stars with a mass of around 10^9 solar masses in approximately 300-400 million years. These findings challenge previous predictions of the number density of such bright sources at high redshifts.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
N. J. Adams et al.
Summary: We conducted an analysis of the James Webb Space Telescope's SMACS 0723 field to search for ultra-high-redshift galaxies. We found four previously unidentified candidate galaxies, with one object at z = 11.5 and another possibly being a pair of galaxies. Most of the candidate galaxies showed evidence of color breaks and emission lines related to gas. These galaxies were exceptionally small in size and had relatively low masses. These candidates will be important targets for future observations to better understand their physical nature.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Aswin P. Vijayan et al.
Summary: The study presents the photometric properties of galaxies in the FLARES simulations, revealing a larger number of intrinsically bright galaxies and exploring the impact of a simple model linking dust attenuation to the metal content of the interstellar medium. The predictions for the UV luminosity function are in agreement with observations at all redshifts, with the brightest galaxies forming in dense environments. Additionally, the study looks at the line luminosity and equivalent widths of prominent nebular emission lines, finding rough agreement with available observations, and examines the relative contribution of obscured and unobscured star formation at these redshifts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Anne Hutter et al.
Summary: ASTRAEUS is a new model of galaxy evolution and reionization that combines N-body simulation, semi-analytical galaxy evolution, and seminumerical reionization scheme, exploring the impact of different radiative feedback models on galaxy formation and evolution as well as ionized regions in the intergalactic medium.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Graziano Ucci et al.
Summary: Next-generation telescopes like JWST and NGRST will allow detailed study of the early Universe. Using the ASTRAEUS framework, this work estimated cosmic variance in UV LF and stellar mass function in JWST surveys, finding that different reionization scenarios have minimal impact on cosmic variance. The study demonstrates how JWST observations can distinguish between reionization feedback models and reveals characteristics of LBGs' environments during the EoR.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
R. J. Bouwens et al.
Summary: This study provides the most comprehensive determinations of the galaxy's rest-frame UV luminosity function (LF) at z similar to 2-9 using the Hubble Space Telescope. The results show a smooth evolution trend in the UV LF from z similar to 10 to z similar to 2, indicating variations in the faint-end slope, characteristic luminosity, and normalization of the LF. These trends can be explained by the evolution of the halo mass function and a simple constant star formation efficiency model.
ASTRONOMICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Rachana Bhatawdekar et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Astronomy & Astrophysics
Katherine E. Whitaker et al.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2019)
Article
Astronomy & Astrophysics
A. C. Carnall et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Yu Feng et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2016)
Article
Astronomy & Astrophysics
Piero Madau et al.
Annual Review of Astronomy and Astrophysics
(2014)
Article
Astronomy & Astrophysics
Pratika Dayal et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2014)
Article
Astronomy & Astrophysics
Richard S. Ellis et al.
ASTROPHYSICAL JOURNAL LETTERS
(2013)
Article
Astronomy & Astrophysics
Anton M. Koekemoer et al.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2013)
Article
Astronomy & Astrophysics
R. J. McLure et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2013)
Article
Astronomy & Astrophysics
Daniel Foreman-Mackey et al.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
(2013)
Article
Astronomy & Astrophysics
Norman A. Grogin et al.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2011)
Article
Astronomy & Astrophysics
Anton M. Koekemoer et al.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2011)
Article
Astronomy & Astrophysics
Stephen M. Wilkins et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2011)
Article
Multidisciplinary Sciences
R. J. Bouwens et al.
Article
Astronomy & Astrophysics
Chien Y. Peng et al.
ASTRONOMICAL JOURNAL
(2010)
Article
Astronomy & Astrophysics
Charlie Conroy et al.
ASTROPHYSICAL JOURNAL
(2010)
Article
Astronomy & Astrophysics
Simon P. Driver et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2010)
Article
Astronomy & Astrophysics
Gabriel B. Brammer et al.
ASTROPHYSICAL JOURNAL
(2008)
Article
Astronomy & Astrophysics
Violet A. Taylor-Mager et al.
ASTROPHYSICAL JOURNAL
(2007)
Article
Astronomy & Astrophysics
O. Ilbert et al.
ASTRONOMY & ASTROPHYSICS
(2006)
Review
Astronomy & Astrophysics
G Bruzual et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2003)
Review
Astronomy & Astrophysics
G Chabrier
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
(2003)
Article
Astronomy & Astrophysics
P Kroupa et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2002)
Article
Astronomy & Astrophysics
CY Peng et al.
ASTRONOMICAL JOURNAL
(2002)
Article
Astronomy & Astrophysics
D Calzetti et al.
ASTROPHYSICAL JOURNAL
(2000)
