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239 papers · 1 filter
Revisiting the Galactic age-metallicity relation from wide white dwarf-main-sequence binaries
Alberto Rebassa-Mansergas, Iset Tejero-Gómez, Roberto Raddi
The age-metallicity relation (AMR) is a fundamental observational constraint for understanding the chemical evolution of the Galaxy. As reliable cosmochronometers, white dwarfs in…
Extreme mass loss during common envelope evolution: the origin of the double low-mass white dwarf system J2102--4145
Leandro G. Althaus, Alejandro H. Corsico, Monica Zorotovic +3
Eclipsing close double white dwarf (WD) systems provide a unique opportunity to directly constrain hydrogen-envelope retention and test common-envelope (CE) evolution in low-mass s…
Constraints on White Dwarf Hydrogen Layer Masses Using Gravitational Redshifts
Stefan M. Arseneau, J. J. Hermes, Maria E. Camisassa +2
The hydrogen envelope is the outermost layer of a DA white dwarf; it makes up the entirety of the stellar photosphere, and yet its typical extent is difficult to model theoreticall…
On the Importance of the Convective Urca Process in 3D Simulations of a Simmering White Dwarf
Ferran Poca-Amorós, Brendan Boyd, Dean M. Townsley +1
Type Ia supernovae are bright thermonuclear explosions that are important to numerous areas of astronomy. However, the origins of these events are poorly understood. One proposed s…
Gaia white dwarfs with infrared excess I. The 100 pc catalogue
R. Murillo-Ojeda, F. M. Jiménez-Esteban, A. Rebassa-Mansergas +1
The presence of infrared excess flux observed in white dwarfs (WDs) is related to the existence of debris disks or substellar companions. These systems provide important clues in t…
Magnetohydrodynamic instabilities in stellar radiative regions. I. Linear study of shear-driven instabilities
V. Durepaire, L. Petitdemange, K. Belkacem +4
This paper is the first in a series investigating magnetohydrodynamic instabilities that may contribute to angular-momentum transport and magnetic-field evolution in stellar radiat…