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Related papers: MESA Isochrones and Stellar Tracks (MIST) III. The…

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We present a set of full evolutionary sequences for white dwarfs with hydrogen-deficient atmospheres. We take into account the evolutionary history of the progenitor stars, all the relevant energy sources involved in the cooling, element…

Helium-core white dwarfs (He WDs) formed through common envelope (CE) evolution offer valuable insight into binary interaction channels and compact remnant formation. Their cooling rates critically impact both detectability and age…

Solar and Stellar Astrophysics · Physics 2025-07-23 Leandro G. Althaus , Leila M. Calcaferro , Alejandro H. Córsico , Warren R. Brown

White dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other…

Solar and Stellar Astrophysics · Physics 2023-02-22 L. L. Amorim , S. O. Kepler , Baybars Külebi , S. Jordan , A. D. Romero

We present a study of the white dwarf (WD) cooling sequence of the globular cluster 47 Tucanae (47 Tuc or NGC 104) using deep infrared observations with the James Webb Space Telescope (JWST). By combining these data with ultra-deep optical…

Solar and Stellar Astrophysics · Physics 2025-06-27 M. Salaris , M. Scalco , L. R. Bedin , S. Cassisi

White dwarfs are excellent forensic tools for studying end-of-life issues surrounding low- and intermediate-mass stars, and the old, solar-metallicity open star cluster Messier 67 is a proven laboratory for the study of stellar evolution…

Solar and Stellar Astrophysics · Physics 2018-11-02 Kurtis A. Williams , Paul A. Canton , A. Bellini , Michael Bolte , Kate H. R. Rubin , Alexandros Gianninas , Mukremin Kilic

The ACS Survey of Galactic Globular Clusters, an HST Treasury Project, will deliver high quality, homogeneous photometry of 65 globular clusters. This paper introduces a new collection of stellar evolution tracks and isochrones suitable for…

Astrophysics · Physics 2010-11-05 A. Dotter , B. Chaboyer , D. Jevremovic , E. Baron , J. W. Ferguson , A. Sarajedini , J. Anderson

Dozens of white dwarfs with anomalous metal polluted atmospheres (DZ WDs) are known to host dust and gas discs. The line profiles of the Ca II triplet emitted by the gas discs show significant asymmetry. Several minor planets have been…

Earth and Planetary Astrophysics · Physics 2024-12-04 Viktória Fröhlich , Zsolt Regály

We report on the identification of 22 new cool DO-type white dwarfs (WD) detected in Data Release 10 (DR10) of the Sloan Digital Sky Survey (SDSS). Among them, we found one more member of the so-called hot-wind DO WDs, which show ultrahigh…

Solar and Stellar Astrophysics · Physics 2014-12-10 N. Reindl , T. Rauch , K. Werner , S. O. Kepler , B. T. Gänsicke , N. P. Gentile Fusillo

We examine the properties of white dwarfs (WDs) accreting hydrogen-rich matter in and near the stable burning regime of accretion rates as modeled by time-dependent calculations done with Modules for Experiments in Stellar Astrophysics…

Solar and Stellar Astrophysics · Physics 2015-06-17 William M. Wolf , Lars Bildsten , Jared Brooks , Bill Paxton

Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluster center were observed and sizeable WD populations were…

Cooling ages of white dwarfs are routinely determined by mapping effective temperatures and masses to ages using evolutionary models. Typically, the reported uncertainties on cooling ages only consider the error propagation of the…

Solar and Stellar Astrophysics · Physics 2025-03-12 Praneet Pathak , Simon Blouin , Falk Herwig

A recent analysis of the 100 pc white dwarf sample in the SDSS footprint demonstrated for the first time the existence of a well defined ultracool -- or IR-faint -- white dwarf sequence in the Hertzsprung-Russell diagram. Here we take…

Solar and Stellar Astrophysics · Physics 2022-08-03 P. Bergeron , Mukremin Kilic , Simon Blouin , A. Bédard , S. K. Leggett , Warren R. Brown

We provide a fine and homogeneous grid of evolutionary sequences for He-core white dwarfs with masses 0.15-0.45 Msun, including the mass range for ELM white dwarfs (<0.20Msun). The grid is appropriate for mass and age determination, and to…

Solar and Stellar Astrophysics · Physics 2015-06-16 Leandro G. Althaus , Marcelo M. Miller Bertolami , Alejandro H. Córsico

White dwarfs correspond to the final stages of stellar evolution of solar-type stars. In these objects, production of energy by nuclear burning has ended which means that a white dwarf simply cools down over the course of the next billion…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. P. Faria , M. J. P. F. G. Monteiro

A white dwarf (WD) captured into a high-eccentricity orbit around a massive black hole (MBH) may undergo many pericenter passages before tidal disruption. During these passages, the tidal potential of the MBH excites internal oscillations…

High Energy Astrophysical Phenomena · Physics 2016-12-22 Michelle Vick , Dong Lai , Jim Fuller

Pulsation modes have recently been observed in a handful of white dwarf (WD) primaries of cataclysmic variables, allowing an interesting new probe into the structure of accreting WD's. We briefly discuss the seismology of these objects, how…

Astrophysics · Physics 2007-05-23 Phil Arras , Dean Townsley , Lars Bildsten

Reliable modeling of the atmospheres of cool white dwarfs is crucial for understanding the atmospheric evolution of these stars and for accurate white dwarfs cosmochronology. Over the last decade {\it ab initio} modeling entered many…

Solar and Stellar Astrophysics · Physics 2015-05-20 Piotr M. Kowalski

We present the results of a deep Hubble Space Telescope (HST) exposure of the nearby globular cluster NGC6397, focussing attention on the cluster's white dwarf cooling sequence. This sequence is shown to extend over 5 magnitudes in depth,…

Recent Monte Carlo plasma simulations to study in crystallizing carbon-oxygen (CO) white dwarfs (WDs) the phase separation of Ne22 (the most abundant metal after carbon and oxygen) have shown that, under the right conditions, a distillation…

Solar and Stellar Astrophysics · Physics 2024-06-05 Maurizio Salaris , Simon Blouin , Santi Cassisi , Luigi R. Bedin

White dwarfs (WDs) offer unrealized potential in solving two problems in astrophysics: stellar age accuracy and precision. WD cooling ages can be inferred from surface temperatures and radii, which can be constrained with precision by high…