Results 1 to 10 of about 1,451,350 (296)

A Deficit of Massive White Dwarfs in Gaia Astrometric Binaries

The Astrophysical Journal Letters
The third data release of Gaia introduced a large catalog of astrometric binaries, out of which about 3200 are likely main-sequence stars with a white dwarf (WD) companion.
Na’ama Hallakoun, Sahar Shahaf, Tsevi Mazeh, Silvia Toonen, Sagi Ben-Ami   +4 more
doaj   +1 more source

Constraints on the Evolution of an Overluminous Blue Supergiant from its Parent Open Cluster, vdBH 245

The Astrophysical Journal
In this paper, we constrain the properties of an overluminous blue supergiant star (BSG) in the open cluster vdBH 245. We confirm the cluster membership of a sample of early-to-mid B-type stars using their proper motions, parallaxes, and radial ...
Alexandre Legault, Nicole St-Louis, André-Nicolas Chené, Fabrice Martins, Anthony Hervé, Leigh C. Smith, Karla Peña Ramírez, Sebastian Ramírez Alegría, Kaimi Kahihikolo   +8 more
doaj   +1 more source

Angular Momentum Loss during Stable Mass Transfer onto a Compact Object: The Effect of Mass Loss via Accretion Disk Winds

The Astrophysical Journal
We use an analytic framework to calculate the evolution of binary orbits under a physically motivated model that accounts for angular momentum loss associated with winds from an accretion disk around the compact-objected accretor.
Monica Gallegos-Garcia, Jonatan Jacquemin-Ide, Vicky Kalogera   +2 more
doaj   +1 more source

Effects of dark matter on the spontaneous scalarization in neutron stars

European Physical Journal C: Particles and Fields
Dark matter, an important portion of compact objects, can influence different phenomena in neutron stars. The spontaneous scalarization in the scalar-tensor gravity has been proposed for neutron stars.
Fahimeh Rahimi, Zeinab Rezaei
doaj   +1 more source

Effect of Neutron Star Jets on Common Envelope Evolution

The Astrophysical Journal
The common envelope (CE) phase is a key stage in binary star evolution that is still not very well understood. Once engulfed by the giant star, the binary companion may accrete envelope material.
Deepanshu Gurjar, Luke Chamandy, Eric G. Blackman, Yangyuxin Zou, Baowei Liu, Jason Nordhaus   +5 more
doaj   +1 more source

CHARA Array Observations of the Evolved Components in Symbiotic Star Systems

The Astrophysical Journal
The nature of the mechanisms that drive mass transfer in symbiotic stars remains an area of active research in stellar astronomy. Constraining the role that both stellar winds and Roche-lobe overflow play in this process is crucial to improving our ...
Thomas Martin Gaudin, Ryan Norris, Magdalena Otulakowska-Hypka, Rachael M. Roettenbacher, Nirupam Roy, Yesenia Beltran, Cameron Caruso, Cody Gustafson, Mason Earick, Andrew Kotowski, Rebecca Proni, Jacob Sandusky, Fabien Baron, Michelle J. Creech-Eakman, John D. Monnier, Stefan Kraus, Narsireddy Anugu, Jean-Baptiste Le Bouquin, Sorabh Chhabra, Isabelle Codron, Claire Davies, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Cyprien Lanthermann, Benjamin R. Setterholm, Christopher D. Farrington, Olli Majoinen, Norm Vargas, Douglas R. Gies, Theo ten Brummelaar, Gail H. Schaefer   +32 more
doaj   +1 more source

Rethinking Thorne–Żytkow Object Formation: The Fate of X-Ray Binary LMC X-4 and Implications for Ultra-long Gamma-Ray Bursts

The Astrophysical Journal
We present a start-to-end simulation aimed at studying the long-term fate of high-mass X-ray binaries and whether a Thorne–Żytkow object (TŻO) might ultimately be assembled.
Tenley Hutchinson-Smith, Rosa Wallace Everson, Angela A. Twum, Aldo Batta, Ricardo Yarza, Jamie A. P. Law-Smith, Alejandro Vigna-Gómez, Enrico Ramirez-Ruiz   +7 more
doaj   +1 more source

Hierarchical Black Hole Mergers in Nuclear Star Clusters: A Combined Dynamical-secular Channel for GW231123-like Events

The Astrophysical Journal
The recent binary black hole (BH) merger GW231123, with both components likely in the high-mass gap and with high spins, challenges standard BH binary formation models.
Bin Liu, Dieran Wang, Dong Lai
doaj   +1 more source

Resolving Black Hole Family Issues among the Massive Ancestors of Very High-spin Gravitational-wave Events like GW231123

The Astrophysical Journal Letters
The latest detection of GW231123, a black hole (BH) merger with exceptionally large component masses and high spins, has been suggested as a smoking gun for hierarchical formation. In this scenario, a first generation of BHs form from collapsing stars in
Jakob Stegmann, Aleksandra Olejak, Selma E. de Mink   +2 more
doaj   +1 more source

Runaway OB Stars in the Small Magellanic Cloud. III. Updated Kinematics and Insights into Dynamical versus Supernova Ejections

The Astrophysical Journal
We use the kinematics of field OB stars to estimate the frequencies of runaway stars generated by the dynamical ejection scenario (DES), the binary supernova scenario (BSS), and the combined two-step mechanism.
Grant D. Phillips, M. S. Oey, Maria Cuevas, Norberto Castro, Rishi Kothari   +4 more
doaj   +1 more source