134 citations · 999 across the 46 of their papers we have counts for
46 papers
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…
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…
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…
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…
Multiperiodic pulsations of the unique DAQ white dwarf J0551+4135: insights into a merger remnant
Murat Uzundag, Mukremin Kilic, Francisco C. De Gerónimo +7
2MASS J05513444+4135297 (herafter J0551+4135) is the only pulsating DAQ white dwarf known with a carbon and hydrogen atmosphere. Its unusual atmospheric composition and kinematics…
Observing bright pulsating white dwarfs with PLATO: A new window into the late stages of stellar evolution
Murat Uzundag, Alejandro H. Corsico, Nicholas Jannsen +17
We present the scientific case for exploiting the capabilities of the PLATO mission to study bright pulsating white dwarfs across a wide spectral range, including hydrogen-deficien…
Circumstellar interaction in the extreme white dwarf merger remnant ZTF\,J1901+1458: A new class of white dwarf merger remnants with X-ray emission
Aayush Desai, Ilaria Caiazzo, Stephane Vennes +31
Double degenerate white dwarf (WD) mergers can exhibit extreme magnetic fields exceeding G and rapid rotation, but their spectral-energy distributions and high-energy emis…
Evolution of a Long-Lived Deep-Seated Main-Sequence Magnetic Field During White Dwarf Cooling
Matias Castro-Tapia, Maria Camisassa, Shu Zhang
We study the evolution of white dwarf (WD) magnetic fields that originate from core-convective dynamos during the main-sequence. Using stellar evolution and WD cooling models combi…
Magnetic White Dwarfs in the SDSS 100 pc Sample: Further Evidence of Two Formation Channels
Adam Moss, Mukremin Kilic, Pierre Bergeron +5
We conduct a model atmosphere analysis on all magnetic white dwarfs in the SDSS 100 pc sample. We have 163 magnetic targets in this sample, 87 of which are new discoveries, making…
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…
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…
White Dwarf Stars in the Big Data Era
Maria Camisassa
White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar e…
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…
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…
Assessing the Observability of Deep Meridional Flow Cells in the Solar Interior
J. R. Fuentes, Bradley W. Hindman, Junwei Zhao +6
Meridional circulation regulates the Sun's interior dynamics and magnetism. While it is well accepted that meridional flows are poleward at the Sun's surface, helioseismic observat…
White dwarf spectral type-temperature distribution from Gaia-DR3 and the Virtual Observatory
S. Torres, P. Cruz, R. Murillo-Ojeda +6
The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. We aim to classify the populatio…
General relativistic pulsations of ultra-massive ZZ Ceti stars
Alejandro H. Córsico, S. Reece Boston, Leandro G. Althaus +4
Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the {\it Gaia} space mission. These dense and compact stellar remna…
Carbon-oxygen ultra-massive white dwarfs in general relativity
Leandro G. Althaus, Alejandro H. Córsico, María E. Camisassa +4
We employ the La Plata stellar evolution code, LPCODE, to compute the first set of constant rest-mass carbon-oxygen ultra-massive white dwarf evolutionary sequences for masses high…
The Puzzling Structure of Solar Convection: Window into the Dynamo
Nicholas A. Featherstone, Kyle C. Augustson, Jonathan M. Aurnou +25
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might pl…
A hidden population of white dwarfs with atmospheric carbon traces in the Gaia bifurcation
Maria Camisassa, Santiago Torres, Mark Hollands +4
The ESA Gaia space mission has revealed a bifurcation of the white dwarf (WD) sequence on the color magnitude diagram in two branches: A and B. While the A branch consists mostly o…