47 citations · 137 across the 20 of their papers we have counts for
21 papers
Now you see me, now you don't: Deep, long-lived obscuration events of white dwarfs by dust and debris from disintegrating planetesimals
J. van Roestel, S. Bhattacharjee, J. A. Guidry +22
Transiting dust and debris around white dwarfs provide a direct view of planetary disruption. We report six previously non-variable white dwarfs that underwent single, deep obscura…
The scarcity of white dwarf-brown dwarf binaries in the solar neighbourhood: A population synthesis study
Alejandro Santos-García, Santiago Torres, Alberto Rebassa-Mansergas +3
White dwarf--brown dwarf (WD--BD) binaries are intrinsically rare systems that provide a unique opportunity to study binary evolution and the formation of substellar companions. De…
Influence of mass-transfer stability on the formation of post-common-envelope binaries
Yanxu Shi, Hongwei Ge, Zhenwei Li +9
Post-common-envelope binaries are the natural laboratories for constraining the physics of common envelope evolution, which is one of the most uncertain phases in binary stellar ev…
An Ultramassive White Dwarf with a Likely Oxygen-Neon Core
Stefan M. Arseneau, J. J. Hermes, Vedant Chandra +4
The core composition of ultramassive white dwarfs remains an open question in stellar evolution. The carbon content of white dwarf cores is critical to their role as progenitors of…
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…
New axion bounds derived from the 100-parsec Gaia DR3 white dwarf luminosity function
Martín L. Alberino, Marcelo M. Miller Bertolami, María E. Camisassa +2
The axion, a well-motivated hypothetical particle arising in extensions of the Standard Model, can be produced copiously within the hot, compact cores of white dwarf stars. The sha…
White Dwarf Binaries: Probes of Future Astrophysics
Anna F. Pala, Roberto Raddi, Alberto Rebassa-Mansergas +25
White dwarf binaries are fundamental astrophysical probes. They represent ideal laboratories to test the models of binary evolution, which also apply to the sources of gravitationa…
White Dwarfs in Wide Binary Systems as Reliable Age Calibrators
Alberto Rebassa-Mansergas, Roberto Raddi, Anna F. Pala +13
Deriving precise stellar ages is a challenging task. Consequently, age-dependent relations - such as the age-metallicity and age-velocity dispersion relations of the Milky Way, or…
The Galactic White Dwarf Population
Santiago Torres, Roberto Raddi, Alberto Rebassa-Mansergas +15
The ESA Gaia mission has revolutionized our understanding of the white dwarf population, delivering an unprecedented census of these nearby remnants and revealing previously unseen…
A magnitude-limited catalogue of unresolved white dwarf-main sequence binaries from Gaia DR3
Alberto Rebassa-Mansergas, Enrique Solano, Alex J. Brown +6
Binary stars containing a white dwarf and a main-sequence star, WDMS binaries, can be used to study a wide range of aspects of stellar astrophysics. We build a magnitude-limited sa…
Reconstructing post-common envelope white dwarf+main sequence binary histories through inverse population synthesis techniques
Santiago Torres, Marta Gili, Alberto Rebassa-Mansergas +3
The evolution of binary stellar systems involves a wide range of physical processes, many of which are not yet well understood. We aim to build a general-purpose algorithm based on…
A population synthesis study of the Gaia 100 pc unresolved white dwarf-main sequence binary population
Alejandro Santos-García, Santiago Torres, Alberto Rebassa-Mansergas +1
Binary stars consisting of a white dwarf and a main sequence star (WDMS) are valuable for studying key astrophysical questions. However, observational biases strongly affect the kn…
Testing the mass-radius relation of white dwarfs in common proper motion pairs I.Hydrogen-dominated atmospheres
Roberto Raddi, Alberto Rebassa-Mansergas, Santiago Torres +6
The main goal of this work was to measure the masses and radii of white dwarfs that belong to widely separated, common proper motion binaries with non-degenerate companions. These…
Main sequence dynamo magnetic fields emerging in the white dwarf phase
Maria Camisassa, J. R. Fuentes, Matthias R. Schreiber +4
Recent observations of volume-limited samples of magnetic white dwarfs (WD) have revealed a higher incidence of magnetism in older WDs. Specifically, these studies indicate that ma…
Kinematic origin of white dwarfs in the solar neighborhood
Ainhoa Zubiaur, Roberto Raddi, Santiago Torres
Thanks to the recent space-borne mission Gaia, there is a nearly complete sample of white dwarfs up to about 100 parsecs from the Sun, which may have very diverse origins. We aim t…
J0526+5934: a peculiar ultra-short period double white dwarf
Alberto Rebassa-Mansergas, Mark Hollands, Steven G. Parsons +6
Ultra-short period compact binaries are important sources of gravitational waves, which include e.g. the progenitors of type Ia supernovae or the progenitors of merger episodes tha…
Exsolution process in white dwarf stars
Maria Camisassa, Denis A. Baiko, Santiago Torres +1
White dwarf (WD) stars are considered cosmic laboratories to study the physics of dense plasma. Furthermore, the use of WD stars as cosmic clocks to date stellar populations and ma…
Main sequence companions to white dwarfs II: the age-activity-rotation relation from a sample of Gaia common proper motion pairs
A. Rebassa-Mansergas, J. Maldonado, R. Raddi +8
Magnetic activity and rotation are related to the age of low-mass main sequence stars. To further constrain these relations, we study a sample of 574 main sequence stars members of…
The unusual planetary nebula nucleus in the Galactic open cluster M37 and six further hot white dwarf candidates
Klaus Werner, Nicole Reindl, Roberto Raddi +6
Planetary nebulae in Galactic open star clusters are rare objects; only three are known to date. They are of particular interest because their distance can be determined with high…
Structure and evolution of ultra-massive white dwarfs in general relativity
L. G. Althaus, M. E. Camisassa, S. Torres +4
We present the first set of constant rest-mass ultra-massive oxygen/neon white dwarf cooling tracks with masses larger than 1.29 Msun which fully take into account the effects of g…
Random Forest identification of the thin disk, thick disk and halo Gaia-DR2 white dwarf population
S. Torres, C. Cantero, A. Rebassa-Mansergas +3
Gaia-DR2 has provided an unprecedented number of white dwarf candidates of our Galaxy. In particular, it is estimated that Gaia-DR2 has observed nearly 400,000 of these objects and…