Related references
Note: Only part of the references are listed.
Article
Astronomy & Astrophysics
R. Andrae et al.
Summary: GSP-Phot is a part of the third Gaia data release, which provides a homogeneous catalogue of stellar parameters for billions of stars based on parameters such as magnitude, spectra, and parallax. The data release includes results for 471 million sources, including effective temperature, surface gravity, metallicity, absolute magnitude, radius, distance, and extinction for each star. GSP-Phot uses a Bayesian forward-modelling approach to simultaneously fit the spectra, parallax, and apparent magnitude of the stars.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. Vallenari et al.
Summary: The third data release of the Gaia mission includes a wide range of new data products, such as an expanded radial velocity survey and extensive astrophysical characterisation. This release provides unprecedented quantity, quality, and variety of source astrophysical data, including spectrophotometry, radial velocities, variables, and astrophysical parameters. It will greatly enhance the potential of Gaia's astrometric, photometric, and radial velocity surveys.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Duncan Farrah et al.
Summary: Observations have found black holes of varying masses throughout cosmic history, but the Kerr black hole solution is incomplete. Black hole models with realistic behavior predict that black holes can increase in mass with the expansion of the universe, independently of accretion or mergers. By studying supermassive black holes in elliptical galaxies, evidence is found for cosmologically coupled mass growth among these black holes, suggesting that black holes contribute as vacuum energy to the cosmological energy density.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Carl L. Rodriguez
Summary: Globular clusters are ancient stellar populations that harbor some of the oldest known stellar-mass black holes. Recent observations suggest a cosmological coupling between black holes and the expanding universe, providing a mechanism for their growth over cosmic time and possibly explaining the origin of dark energy. This paper shows that the mass functions of black hole candidates in NGC 3201 constrain the cosmologically coupled growth of black holes, highlighting their role as laboratories for studying astrophysical black hole evolution.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Kareem El-Badry et al.
Summary: We have discovered a bright and nearby Sun-like star orbiting a dark object. The system has been identified as a black hole candidate through astrometric orbital analysis from the Gaia mission. The modeling of radial velocities and astrometry provides constraints on the companion mass, and the spectroscopic orbit sets a minimum companion mass. This discovery suggests the existence of a sizable population of dormant black holes in binaries.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Kareem El-Badry et al.
Summary: We report spectroscopic and photometric follow-up of a dormant black hole candidate from Gaia DR3, which consists of a red giant and a dark companion. The orbital period is much longer than any previously studied black hole binary, and the radial velocity follow-up supports the Gaia solution. UV imaging and high-resolution optical spectra rule out luminous companions that could explain the orbit. The system's Galactocentric orbit is typical of the thin disc, and X-ray and radio observations near periastron suggest a lower net accretion rate at the horizon. Gaia BH2 is the second-nearest known black hole after Gaia BH1, and their wide orbits may hint at a bimodal intrinsic period distribution for wide black hole binaries.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Duncan Farrah et al.
Summary: By constructing three samples of elliptical galaxies at different redshifts and using a Bayesian analysis framework, this study finds evidence for translational offsets in both stellar mass and supermassive black hole (SMBH) mass. The offsets in SMBH mass between different redshifts are larger, and the magnitude and redshift evolution of the offset cannot be explained solely by selection and measurement biases. Therefore, there may be a physical mechanism that preferentially grows SMBHs in elliptical galaxies at lower redshifts or the biases are both underestimated and dependent on redshift.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Christine Ye et al.
Summary: Gravitational-wave detections of merging neutron star-black hole systems provide insights into the mass distributions of astrophysical neutron stars and black holes. The study focuses on the maximum neutron star mass, minimum black hole mass, and possible mass gap between them. Rapidly spinning neutron stars may have larger maximum masses compared to nonspinning ones. The research suggests the existence of a mass gap and the minimum mass of a black hole. Future observations could further constrain the maximum nonspinning neutron star mass and determine the relationship between neutron star spin and maximum mass solely from gravitational-wave data. To avoid bias, the spins and masses of rapidly rotating neutron stars need to be modeled simultaneously.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Kevin S. Croker et al.
Summary: In this study, a single-parameter route is proposed for reproducing higher mass objects observed in the LIGO-Virgo mass distribution, using only the isolated-binary stellar evolution channel. The research also explores the possibility of solutions with cosmological boundary conditions and how observational signatures can confirm or invalidate their astrophysical relevance.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Multidisciplinary Sciences
James C. A. Miller-Jones et al.
Summary: The evolution of massive stars is influenced by mass lost to stellar winds, which ultimately impact the masses of stellar remnants, such as black holes. A study using radio astrometry to refine the distance to the black hole x-ray binary Cygnus X-1 found the black hole mass to be 21.2 solar masses, higher than previous measurements. Formation of such high-mass black holes in high-metallicity systems within the Milky Way constraints wind mass loss from massive stars.
Article
Astronomy & Astrophysics
S. E. Woosley et al.
Summary: The study examines the factors affecting the theoretical estimates for the boundaries of the mass gap between black holes and supernovae, including nuclear reaction rates, evolution in detached binaries, rotation, and hyper-Eddington accretion after black hole birth. Current uncertainties in reaction rates may allow the lower boundary of the mass gap to rise to 64 solar masses, while rapid rotation and super-Eddington accretion could further increase this lower limit.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Feige Wang et al.
Summary: The discovery of the distant quasar J0313-1806 challenges theoretical models of supermassive black hole growth, with a mass similar to 670 million years after the big bang. The complex structure of this quasar suggests the presence of a massive supermassive black hole and a star-forming galaxy, providing insights into the formation and evolution of the earliest massive galaxies.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
N. Aghanim et al.
ASTRONOMY & ASTROPHYSICS
(2020)
Article
Astronomy & Astrophysics
Giada Pastorelli et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
K. S. Croker et al.
ASTROPHYSICAL JOURNAL
(2019)
Article
Multidisciplinary Sciences
Adrian Cho
Article
Astronomy & Astrophysics
Conrad Chan et al.
ASTROPHYSICAL JOURNAL LETTERS
(2018)
Article
Astronomy & Astrophysics
Luciano Rezzolla et al.
ASTROPHYSICAL JOURNAL LETTERS
(2018)
Article
Astronomy & Astrophysics
Yang Chen et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Jing Tang et al.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2014)
Article
Astronomy & Astrophysics
Will M. Farr et al.
ASTROPHYSICAL JOURNAL
(2011)
Article
Astronomy & Astrophysics
Feryal Oezel et al.
ASTROPHYSICAL JOURNAL
(2010)
Review
Astronomy & Astrophysics
Valerio Faraoni et al.