405 citations · 4.9k across the 99 of their papers we have counts for
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Axions and the white dwarf luminosity function
J. Isern, S. Catalan, E. Garcia-Berro +1
The evolution of white dwarfs can be described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, t…
Axions and the cooling of white dwarf stars
J. Isern, E. Garcia-Berro, S. Torres +1
White dwarfs are the end-product of the lifes of intermediate- and low-mass stars and their evolution is described as a simple cooling process. Recently, it has been possible to de…
The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution
S. Catalan, J. Isern, E. Garcia-Berro +1
The initial-final mass relationship connects the mass of a white dwarf with the mass of its progenitor in the main-sequence. Although this function is of fundamental importance to…
The contribution of red dwarfs and white dwarfs to the halo dark matter
S. Torres, J. Camacho, J. Isern +1
The nature of the several microlensing events observed by the MACHO team towards the LMC still remains controversial. Low-mass substellar objects and stars with masses larger than…
Gravitational settling of 22Ne and white dwarf evolution
E. García--Berro, L. G. Althaus, A. H. Córsico +1
We study the effects of the sedimentation of the trace element 22Ne in the cooling of white dwarfs. In contrast with previous studies, which adopted a simplified treatment of the e…
WD0433+270: an old Hyades stream member or an Fe-core white dwarf?
S. Catalan, I. Ribas, J. Isern +1
G39-27/289 is a common proper motion pair formed by a white dwarf (WD0433+270) and a main-sequence star (BD+26 730) that apparently has been classified as a member of the Hyades op…
The initial-final mass relationship from white dwarfs in common proper motion pairs
S. Catalan, J. Isern, E. Garcia-Berro +3
The initial-final mass relationship of white dwarfs, which is poorly constrained, is of paramount importance for different aspects in modern astrophysics. From an observational per…
The contribution of Oxygen-Neon white dwarfs to the MACHO content of the Galactic Halo
J. Camacho, S. Torres, J. Isern +2
The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. White dwarfs have been proposed to explain these results and, hence…
The white dwarf luminosity function --II. The effect of the measurement errors and other biases
S. Torres, E. Garcia-Berro, J. Isern
Only the 1/V_max method has been employed so far for observationally determining the white dwarf luminosity function, whereas for other kind of luminosity functions several other m…
Evidence for a merger of binary white dwarfs: the case of GD 362
E. Garcia-Berro, P. Loren-Aguilar, A. G. Pedemonte +4
GD 362 is a massive white dwarf with a spectrum suggesting a H-rich atmosphere which also shows very high abundances of Ca, Mg, Fe and other metals. However, for pure H-atmospheres…
The late stages of the evolution of intermediate-mass primordial stars: the effects of overshooting
Pilar Gil-Pons, Jordi Gutierrez, Enrique Garcia-Berro
We compute and analyze the evolution of primordial stars of masses at the ZAMS between 5 M_sun and 10 M_sun, with and without overshooting. Our main goals are to determine the natu…
The white dwarf luminosity function. I. Statistical errors and alternatives
E. M. Geijo, S. Torres, J. Isern +1
Over the years, several methods have been proposed to compute galaxy luminosity functions, from the most simple ones -counting sample objects inside a given volume- to very sophist…
Simulating Gaia performances on white dwarfs
S. Torres, E. Garcia-Berro, J. Isern +1
One of the most promising space missions of ESA is the astrometric satellite Gaia, which will provide very precise astrometry and multicolour photometry, for all 1.3 billion object…
Optimization of time data codification and transmission schemes: Application to Gaia
Jordi Portell, Enrique Garcia-Berro, Xavier Luri
Gaia is an ambitious space observatory devoted to obtain the largest and most precise astrometric catalogue of astronomical objects from our Galaxy and beyond. On-board processing…
The Payload Data Handling and Telemetry Systems of Gaia
Jordi Portell, Xavier Luri, Enrique Garcia-Berro +1
The Payload Data Handling System (PDHS) of Gaia is a technological challenge, since it will have to process a huge amount of data with limited resources. Its main tasks include the…
Limit-cycle behavior in one-zone convective models
A. Munteanu, G. Bono, J. Jose +2
We present the results of a detailed set of one-zone models that account for the coupling between pulsation and convection following the original prescriptions of Stellingwerf (198…
The gravitational collapse of ONe electron-degenerate cores and white dwarfs: the role of Mg and C revisited
J. L. Gutierrez, R. Canal, E. Garcia-Berro
The final stages of the evolution of electron--degenerate ONe cores, resulting from carbon burning in ``heavy weight'' intermediate--mass stars ($8 M_{\sun}\la M \la 11 M_{\sun}$)…
The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection
L. G. Althaus, A. M. Serenelli, J. A. Panei +3
This paper is designed to explore the formation and evolution of hydrogen-deficient post-AGB white dwarfs. To this end, we compute the complete evolution of an initially 2.7 M_sun…
Carbon burning in intermediate mass primordial stars
P. Gil-Pons, T. Suda, M. Y. Fujimoto +1
The evolution of a zero metallicity 9 M_s star is computed, analyzed and compared with that of a solar metallicity star of identical ZAMS mass. Our computations range from the main…
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores
A. H. Corsico, E. Garcia-Berro, L. G. Althaus +1
We explore the adiabatic pulsational properties of massive white dwarf stars with hydrogen-rich envelopes and oxygen/neon and carbon/oxygen cores. To this end, we compute the cooli…
New evolutionary models for massive ZZ Ceti stars. II. The effects of crystallization on their pulsational properties
A. H. Corsico, L. G. Althaus, M. H. Montgomery +2
We present in this work new pulsational calculations for improved carbon-oxygen DA white dwarf models suitable for the study of massive ZZ Ceti stars. The background models employe…
Monte Carlo simulations of the halo white dwarf population
E. Garcia-Berro, S. Torres, J. Isern +1
The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. Whereas white dwarfs have been proposed to explain these results an…
Time variation of G and αwithin models with extra dimensions
P. Loren-Aguilar, E. Garcia-Berro, J. Isern +1
We derive the formulae for the time variation of the gravitational "constant" G and of the fine structure "constant" αin various models with extra dimensions and analyze their cons…
The Impact of the Chemical Stratification of White Dwarfs on the Classification of Classical Novae
Jordi Jose, Margarita Hernanz, Enrique Garcia-Berro +2
We analyse the impact of the initial abundances of the underlying white dwarf core on the nucleosynthesis accompanying classical nova outbursts, in the framework of hydrodynamic mo…