Publications (92)
The age and colors of massive white dwarf stars
L. G. Althaus, E. GarcÃa-Berro, J. Isern +2
We present evolutionary calculations and colors for massive white dwarfs with oxygen-neon cores for masses between 1.06 and 1.28 Mo. The evolutionary stages computed cover the lumi…
IAXO - The International Axion Observatory
J. K. Vogel, F. T. Avignone, G. Cantatore +61
The International Axion Observatory (IAXO) is a next generation axion helioscope aiming at a sensitivity to the axion-photon coupling of a few 10^{-12} GeV^{-1}, i.e. 1-1.5 orders…
The role of gravitational supernovae on the galactic evolution of the LiBeB isotopes
C. Abia, J. Isern, U. Lisenfeld
The observed Be and B relationships with metallicity clearly support the idea that both elements have a primary origin and that are produced by the same class of objects. Spallatio…
On the ^7 Li and ^7 Be synthesis in novae
M. Hernanz, J. Jose, A. Coc +1
The production of ^7 Li and ^7 Be during the explosive hydrogen-burning that occurs in nova explosions is computed by means of a hydrodynamic code able to treat both the accretion…
LOFT: the Large Observatory For X-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +245
The LOFT mission concept is one of four candidates selected by ESA for the M3 launch opportunity as Medium Size missions of the Cosmic Vision programme. The launch window is curren…
Nucleosynthesis during the Merger of White Dwarfs and the Origin of R Coronae Borealis Stars
R. Longland, P. Lorén-Aguilar, J. José +3
Many hydrogen deficient stars are characterised by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that th…
The e-ASTROGAM gamma-ray space observatory for the multimessenger astronomy of the 2030s
V. Tatischeff, A. De Angelis, M. Tavani +74
e-ASTROGAM is a concept for a breakthrough observatory space mission carrying a gamma-ray telescope dedicated to the study of the non-thermal Universe in the photon energy range fr…
On the White Dwarf distances to Galactic Globular Clusters
M. Salaris, S. Cassisi, E. Garcia-Berro +2
We analyze in detail various possible sources of systematic errors on the distances of globular clusters derived by fitting a local template DA white dwarf sequence to the cluster…
SN 2011fu: A type IIb Supernova with a luminous double-peaked light curve
A. Morales-Garoffolo, N. Elias-Rosa, M. Bersten +17
We present optical and near infrared observations of the type IIb supernova (SN) 2011fu from a few days to d after explosion. The SN presents a double-peaked light curve…
Observation of SN2011fe with INTEGRAL. I. Pre--maximum phase
J. Isern, P. Jean, E. Bravo +19
SN2011fe was detected by the Palomar Transient Factory on August 24th 2011 in M101 a few hours after the explosion. From the early optical spectra it was immediately realized that…
Gamma-ray emission of classical novae and its detectability by INTEGRAL
M. Hernanz, J. Gomez-Gomar, J. Jose +2
A lot of information concerning the mechanism of nova explosions will be extracted from the possible future observations with INTEGRAL. In order to be prepared for this task, we ar…
Gravitational settling of 22Ne and white dwarf evolution
E. GarcÃa--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…
Science with e-ASTROGAM (A space mission for MeV-GeV gamma-ray astrophysics)
A. De Angelis, V. Tatischeff, I. A. Grenier +248
e-ASTROGAM (enhanced ASTROGAM) is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated t…
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…
Monte Carlo simulations of the disk white dwarf population
E. Garcia-Berro, S. Torres, J. Isern +1
In order to understand the dynamical and chemical evolution of our Galaxy it is of fundamental importance to study the local neighborhood. White dwarf stars are ideal candidates to…
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…
SNhunt151: an explosive event inside a dense cocoon
N. Elias-Rosa, S. Benetti, E. Cappellaro +20
SNhunt151 was initially classified as a supernova (SN) impostor (nonterminal outburst of a massive star). It exhibited a slow increase in luminosity, lasting about 450 d, followed…
Gamma-ray emission from novae related to positron annihilation: constraints on its observability posed by new experimental nuclear data
M. Hernanz, J. Jose, A. Coc +2
Classical novae emit gamma-ray radiation at 511 keV and below, with a cut-off at around (20-30) keV, related to positron annihilation and its Comptonization in the expanding envelo…
Smoothed Particle Hydrodynamics simulations of white dwarf collisions and close encounters
P. Lorén-Aguilar, J. Isern, E. GarcÃa-Berro
The collision of two white dwarfs is a quite frequent event in dense stellar systems, like globular clusters and galactic nuclei. In this paper we present the results of a set of s…
The Physics of crystallizing white dwarfs
J. Isern, R. Mochkovitch, E. GarcÃa--Berro +1
White dwarfs can be used as galactic chronometers and, therefore, provide important information about galactic evolution if good theoretical models of their cooling are available.…
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…
White Dwarf Collisions, a promising scenario to account for meteoritic anomalies
J. Isern, E. Bravo
It is commonly accepted that collisions between white dwarfs (WD) are rare events that only occur in the dense interior of globular clusters or in the dense outskirts around the ce…
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 con…
Insights on the physics of SNIa obtained from their gamma-ray emission
J. Isern, E. Bravo, P. Jean +1
Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a carbon/oxygen white dwarf in a close binary system. Their optical light curve is powered by the…
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…
High-resolution Smoothed Particle Hydrodynamics simulations of the merger of binary white dwarfs
P. Lorén-Aguilar, J. Isern, E. GarcÃa-Berro
We present the results of a set of high-resolution simulations of the merging process of two white dwarfs. In order to do so, we use an up-to-date Smoothed Particle Hydrodynamics c…
Gamma-Ray emission from SN2014J near maximum optical light
J. Isern, P. Jean, E. Bravo +17
The optical light curve of Type Ia supernovae (SNIa) is powered by thermalized gamma-rays produced by the decay of 56Ni and 56Co, the main radioactive isotopes synthesized by the t…
SN 2019vxm: A luminous and long-lived Type IIn supernova with early flash-ionisation features
Y. -Z. Cai, A. Pastorello, T. J. Moriya +38
We present the photometric and spectroscopic analysis of the luminous and long-lasting Type IIn supernova (SN) 2019vxm. The SN reaches a peak V-band absolute magnitude of MV = -20.…
SN 2022ngb: A faint, slowly evolving Type IIb supernova with a low-mass envelope
J. -W. Zhao, S. Benetti, Y. -Z. Cai +35
An extensive photometric and spectroscopic follow-up campaign of the Type IIb SN 2022ngb is presented in the article. Through detailed modeling of this dataset, we aim to constrain…
Gaia16apd -- a link between fast-and slowly-declining type I superluminous supernovae
T. Kangas, N. Blagorodnova, S. Mattila +18
We present ultraviolet, optical and infrared photometry and optical spectroscopy of the type Ic superluminous supernova (SLSN) Gaia16apd (= SN 2016eay), covering its evolution from…
The cooling of CO white dwarfs: influence of the internal chemical distribution
M. Salaris, I. Dominguez, E. Garcia-Berro +3
In this paper we compute detailed evolutionary models providing chemical profiles for white dwarfs having progenitors in the mass range from 1.0 to $7 M_{\sun}$ and we examine the…
The Kr85 s-process Branching and the Mass of Carbon Stars
C. Abia, M. Busso, R. Gallino +3
We present new spectroscopic observations for a sample of C(N)-type red giants. These objects belong to the class of Asymptotic Giant Branch stars, experiencing thermal instabiliti…
Type Ia supernovae and the DD scenario
J. Isern, E. GarcÃa-Berro, P. Lorén-Aguilar
Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a white dwarf in a close binary system. Two possible scenarios, not necessarily incompatible, hav…
Double degenerate mergers as progenitors of high-field magnetic white dwarfs
E. GarcÃa-Berro, P. Lorén-Aguilar, G. Aznar-Siguán +6
High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mechanism that produces t…
White paper: Gaia and the end states of stellar evolution
M. A Barstow, S. L. Casewell, S. Catalan +18
This is the product of a Gaia GREAT workshop on "Gaia and the end states of stellar evolution" held at the University of Leicester in April 2011.
Axion cooling of white dwarfs
J. Isern, S. Catalan, E. Garcia--Berro +2
The evolution of white dwarfs is a simple gravothermal process. This process can be tested in two ways, through the luminosity function of these stars and through the secular varia…
The gravitational wave radiation of pulsating white dwarfs revisited: the case of BPM 37093 and PG 1159-035
E. Garcia-Berro, P. Loren-Aguilar, A. H. Corsico +3
We compute the emission of gravitational radiation from pulsating white dwarfs. This is done by using an up-to-date stellar evolutionary code coupled with a state-of-the-art pulsat…
Revisiting the luminosity function of single halo white dwarfs
R. Cojocaru, S. Torres, L. G. Althaus +2
White dwarfs are the fossils left by the evolution of low-and intermediate-mass stars, and have very long evolutionary timescales. This allows us to use them to explore the propert…
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 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…
Possibility of the detection of classical novae with the shield of the INTEGRAL-spectrometer SPI
P. Jean, J. Gomez-Gomar, M. Hernanz +7
The shield of the INTEGRAL spectrometer provides a large detection area with a wide field-of-view. Calculations have been performed to check whether the temporal analysis of the co…
Constraining the axion mass through the asteroseismology of the ZZ Ceti star G117-B15A
A. H. Córsico, L. G. Althaus, A. D. Romero +3
We perform an asteroseismological study on the DAV star G117-B15A on the basis of a modern set of fully evolutionary DA white dwarf models that have consistent chemical profiles at…
On the Evolution of Cosmological Type Ia Supernovae and the Gravitational Constant
E. Garcia-Berro, E. Gaztanaga, J. Isern +2
There are at least three ways in which a varying gravitational constant could affect the interpretation of the recent high-redhisft Type Ia supernovae results. If the local val…
Axions and White Dwarfs
J. Isern, S. Catalan, E. Garcia-Berro +2
White dwarfs are almost completely degenerate objects that cannot obtain energy from the thermonuclear sources and their evolution is just a gravothermal process of cooling. The si…
Type Ia supernovae from chemically segregated white dwarfs
E. Bravo, J. Isern, L. Piersanti
Type Ia supernovae are the outcome of the explosion of a carbon-oxygen white dwarf in a close binary system. They are thought to be the main contributors to the galactic nucleosynt…
Cobalt-56 gamma-ray emission lines from the type Ia supernova 2014J
E. Churazov, R. Sunyaev, J. Isern +8
A type Ia supernova is thought to be a thermonuclear explosion of either a single carbon-oxygen white dwarf or of a pair of merging white dwarfs. The explosion fuses a large amount…
Gamma-rays from SNIa
J. Isern, E. Bravo, P. Jean
Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a carbon/oxygen white dwarf in a close binary system. Their optical light curve is powered by the…
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…
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…
Predictions of gamma-ray emission from classical novae and their detectability by CGRO
M. Hernanz, J. Gomez-Gomar, J. Jose +1
An implicit hydrodynamic code following the explosion of classical novae, from the accretion phase up to the final ejection of the envelope, has been coupled to a MonteCarlo code a…
Gamma--ray emission from individual classical novae
J. Gómez-Gomar, M. Hernanz, J. José +1
Classical novae are important producers of radioactive nuclei, such as be7, n13, f18, na22 and al26. The disintegration of these nuclei produces positrons (except for be7) that thr…
The variation of the gravitational constant inferred from the Hubble diagram of Type Ia supernovae
E. Garcia-Berro, Yu. A. Kubyshin, P. Loren-Aguilar +1
We consider a cosmological model with a variable gravitational constant, G, based on a scalar-tensor theory. Using the recent observational data for the Hubble diagram of type Ia s…
EuCAPT White Paper: Opportunities and Challenges for Theoretical Astroparticle Physics in the Next Decade
R. Alves Batista, M. A. Amin, G. Barenboim +134
Astroparticle physics is undergoing a profound transformation, due to a series of extraordinary new results, such as the discovery of high-energy cosmic neutrinos with IceCube, the…
All-Sky-ASTROGAM: The MeV Gamma-Ray Companion to Multimessenger Astronomy
V. Tatischeff, A. De Angelis, M. Tavani +33
All-Sky-ASTROGAM is a gamma-ray observatory operating in a broad energy range, 100 keV to a few hundred MeV, recently proposed as the "Fast" (F) mission of the European Space Agenc…
Mass-radius relations for massive white dwarf stars
L. G. Althaus, E. GarcÃa--Berro, J. Isern +1
We present detailed theoretical mass-radius relations for massive white dwarf stars with oxygen-neon cores. This work is motivated by recent observational evidence about the existe…
Simplified treatment of the radiative transfer problem in expanding envelopes
J. Gomez-Gomar, J. Isern
In this paper we study the application of a simplified method to solve the dynamic radiative transfer problem in expanding envelopes. The method, which requires a computational eff…
The e-ASTROGAM gamma-ray space mission
V. Tatischeff, M. Tavani, P. von Ballmoos +48
The e-ASTROGAM is a gamma-ray space mission to be proposed as the M5 Medium-size mission of the European Space Agency. It is dedicated to the observation of the Universe with unpre…
White dwarf mergers and the origin of R Coronae Borealis stars
P. Lorén-Aguilar, R. Longland, J. José +3
We present a nucleosynthesis study of the merger of a 0.4 solar masses helium white dwarf with a 0.8 solar masses carbon-oxygen white dwarf, coupling the thermodynamic history of S…
Conceptual Design of the International Axion Observatory (IAXO)
E. Armengaud, F. T. Avignone, M. Betz +85
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) origin…
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…
Supernovae 2016bdu and 2005gl, and their link with SN 2009ip-like transients: another piece of the puzzle
A. Pastorello, C. S. Kochanek, M. Fraser +52
Supernova (SN) 2016bdu is an unusual transient resembling SN 2009ip. SN 2009ip-like events are characterized by a long-lasting phase of erratic variability which ends with two lumi…
A large stellar evolution database for population synthesis studies: VI. White dwarf cooling sequences
M. Salaris, S. Cassisi, A. Pietrinferni +2
We present a new set of cooling models and isochrones for both H- and He-atmosphere white dwarfs, incorporating accurate boundary conditions from detailed model atmosphere calculat…
Further constraints on white dwarf galactic halos
R. Canal, J. Isern, P. Ruiz-Lapuente
The suggestion that roughly half the mass of the galactic halo might be in the form of white dwarfs, together with the limits on the infrared background light and on the initial me…
White dwarfs as physics laboratories: the case of axions
J. Isern, L. Althaus, S. Catalan +4
White dwarfs are almost completely degenerate objects that cannot obtain energy from thermonuclear sources, so their evolution is just a gravothermal cooling process. Recent improv…
Type Ia supernovae and the ^{12}C+^{12}C reaction rate
E. Bravo, L. Piersanti, I. DomÃnguez +3
The experimental determination of the cross-section of the ^{12}C+^{12}C reaction has never been made at astrophysically relevant energies (E<2 MeV). The profusion of resonances th…
SN 2016iog: A fast declining Type II-L supernova with an ultra-faint tail, persistently interacting with circumstellar material
Z. -H. Peng, S. Benetti, Y. -Z. Cai +26
We present optical photometric and spectroscopic observations of the rapidly declining Type IIL supernova (SN) 2016iog. SN 2016iog reached its peak 14 days after explosion,…
SN2017ckj: A linearly declining Type IIb supernova with a relatively massive hydrogen envelope
L. -H. Li, S. Benetti, Y. -Z. Cai +26
We present optical observations of the Type IIb supernova (SN) 2017ckj, covering approximately 180 days after the explosion. Its early-time multi-band light curves display no clear…
White dwarf cooling sequences and cosmochronology
J. Isern, A. Artigas, E. Garcia-Berro
The evolution of white dwarfs is a simple gravothermal process. This means that their luminosity function, i.e. the number of white dwarfs per unit bolometric magnitude and unit vo…
Synthesis of radioactive elements in novae and supernovae and their use as a diagnostic tool
J. Isern, M. Hernanz, E. Bravo +5
Novae and supernovae play a key role in many fields of Astrophysics and Cosmology. Despite their importance, an accurate description of which objects explode and why and how they e…
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…
Bounds on the possible evolution of the Gravitational Constant from Cosmological Type-Ia Supernovae
E. Gaztanaga, E. Garcia-Berro, J. Isern +2
Recent high-redshift Type Ia supernovae results can be used to set new bounds on a possible variation of the gravitational constant . If the local value of at the space-time…
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 Implications of the New Z=0 Stellar Models and Yields on the Early Metal Pollution of the Intergalactic Medium
C. Abia, I. Dominguez, O. Straniero +3
Motivated by the recent detection of metals in different components of the high redshift universe and by the abundance ratios measured in the extremely metal-poor stars of our Gala…
The white dwarf cooling sequence of NGC 6791: a unique tool for stellar evolution
E. GarcÃa-Berro, S. Torres, I. Renedo +5
NGC 6791 is a well-studied, metal-rich open cluster that is so close to us that can be imaged down to luminosities fainter than that of the termination of its white dwarf cooling s…
s-Process Nucleosynthesis in Carbon Stars
C. Abia, I. Dominguez, R. Gallino +6
We present the first detailed and homogeneous analysis of the s-element content in Galactic carbon stars of N-type. Abundances of Sr,Y, Zr (low-mass s-elements, or ls) and of Ba, L…
AT 2017be - a new member of the class of Intermediate-Luminosity Red Transients
Y-Z. Cai, A. Pastorello, M. Fraser +20
We report the results of our spectrophotometric monitoring campaign for AT~2017be in NGC~2537. Its lightcurve reveals a fast rise to an optical maximum, followed by a plateau lasti…
Gamma-rays from Type Ia supernova SN2014J
E. Churazov, R. Sunyaev, J. Isern +8
The whole set of INTEGRAL observations of type Ia supernova SN2014J, covering the period 19-162 days after the explosion has being analyzed. For spectral fitting the data are split…
On the origin of high-field magnetic white dwarfs
E. GarcÃa-Berro, S. Torres, P. Lorén-Aguilar +6
High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mechanism that produces t…
Axions and the pulsation periods of variable white dwarfs revisited
J. Isern, E. GarcÃa-Berro, L. G. Althaus +1
Axions are the natural consequence of the introduction of the Peccei-Quinn symmetry to solve the strong CP problem. All the efforts to detect such elusive particles have failed up…
The halo white dwarf population
J. Isern, E. Garcia-Berro, M. Hernanz +2
Halo white dwarfs can provide important information about the properties and evolution of the galactic halo. In this paper we compute, assuming a standard IMF and updated models of…
The ages of very cool hydrogen-rich white dwarfs
M. Salaris, E. Garcia-Berro, M. Hernanz +2
The evolution of white dwarfs is essentially a cooling process that depends primarily on the energy stored in their degenerate cores and on the transparency of their envelopes. In…
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…
The energetics of crystallizing white dwarfs revisited again
J. Isern, E. Garcia-Berro, M. Hernanz +1
The evolution of white dwarfs is a cooling process that depends on the energy stored in the core and on the way in which it is transferred through the envelope. In this paper we sh…
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…
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…
Unified 1-D Simulations of Gamma-Ray Line Emission from Type Ia Supernovae
P. A. Milne, A. L. Hungerford, C. L. Fryer +9
The light curves of Type Ia Supernovae (SN Ia) are powered by gamma-rays emitted by the decay of radioactive elements such as Ni and its decay products. These gamma-rays are…
The potential of the variable DA white dwarf G117-B15A as a tool for Fundamental Physics
A. H. Corsico, O. G. Benvenuto, L. G. Althaus +2
White dwarfs are well studied objects. The relative simplicity of their physics allows to obtain very detailed models which can be ultimately compared with their observed propertie…
Observations of SN2011fe with INTEGRAL
J. Isern, P. Jean, E. Bravo +19
SN2011fe was detected by the Palomar Transient Factory on August 24th 2011 in M101 few hours after the explosion. From the early spectra it was immediately realized that it was a T…
White dwarfs with hydrogen-deficient atmospheres and the dark matter content of the Galaxy
S. Torres, J. Camacho, J. Isern +1
The nature of the several microlensing events observed by the MACHO team towards the Large Magellanic Cloud (LMC) is still a subject of debate. Low-mass substellar objects and star…
Gravitational wave radiation from the coalescence of white dwarfs
P. Loren-Aguilar, J. Guerrero, J. Isern +2
We compute the emission of gravitational radiation from the merging of a close white dwarf binary system. This is done for a wide range of masses and compositions of the white dwar…
The impact of mergers in the mass distribution of white dwarfs
J. Isern, S. Catalan, E. Garcia-Berro +1
Recent surveys have allowed to derive the white dwarf mass distribution with reasonable accuracy. This distribution shows a noticeable degree of structure that it is often attribut…
The evolution of white dwarfs with a varying gravitational constant
L. G. Althaus, A. H. Corsico, S. Torres +3
Within the theoretical framework of some modern unification theories the constants of nature are functions of cosmological time. White dwarfs offer the possibility of testing a pos…