J/MNRAS/480/1547 Full Evolutionary Sequences of Massive WDs (Lauffer+, 2018)
New full evolutionary sequences of H- and He-atmosphere massive
white dwarf stars using MESA.
Lauffer G.R., Romero A.D., Kepler S.O.
<Mon. Not. R. Astron. Soc. 480, 1547 (2018)>
=2018MNRAS.480.1547L 2018MNRAS.480.1547L (SIMBAD/NED BibCode)
ADC_Keywords: Models, atmosphere ; Stars, white dwarf
Keywords: methods: numerical - stars: evolution - stars: white dwarfs
Abstract:
We explore the evolution of hydrogen-rich and hydrogen-deficient white
dwarf stars with masses between 1.012 and 1.307M_☉, and initial
metallicity of Z=0.02. These sequences are the result of
main-sequence stars with masses between 8.8 and 11.8M_☉. The
simulations were performed with MESA (Modules for Experiments in
Stellar Astrophysics), starting at the zero-age main sequence, through
thermally pulsing and mass-loss phases, ending at the white dwarf
cooling sequence. We present reliable chemical profiles for the whole
mass range considered, covering the different expected central
compositions (i.e. C/O, O/Ne and Ne/O/Mg) and its dependence on the
stellar mass. In addition, we present detailed chemical profiles of
hybrid C/O-O/Ne core white dwarfs, found in the mass range between
1.024 and 1.15M_☉. We present the initial-to-final mass
relation, the mass-radius relation and cooling times considering the
effects of atmosphere and core composition.
Description:
Set of 16 .dat files with the cooling tracks for all evolutionary
sequences computed. Which .dat file is named as
Atmosphere_composition-Mass.dat. For example: H_atm-M1.0124.dat,
He_atm-M1.22.dat
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 16 List of evolutionary tracks sequences
tracks/* . 32 Individual tracks for H and He
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 F5.2 Msun MZAMS Values of initial mass at ZAMS
7- 11 F5.3 Msun MWD White dwarfs mass
13- 17 F5.3 --- mlogMH/MWD Hydrogen content for H-rich sequence
(-logMH/MWD)
19- 23 F5.3 --- mlogMHe/MWD Helium content for H-rich sequence
(-logMHe/MWD)
25- 41 A17 --- NameH Name of evolutionary tracks sequence with
H atmosphere in subdirectory tracks
43- 60 A18 --- NameHe Name of evolutionary tracks sequence with
He atmosphere in subdirectory tracks
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Byte-by-byte Description of file (#): tracks/*
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Bytes Format Units Label Explanations
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1- 18 F18.16 [K] logTeff Effective temperature in log scale
20- 42 F23.20 [Lsun] logL Luminosity in log scale
44- 61 F18.16 [cm/s2] logg Surface gravity in log scale
63- 81 F19.16 [Rsun] logR Radius in log scale
83-100 F18.16 Msun Mass Mass
102-123 E22.15 Gyr Age Cooling age
125-144 F20.18 Gyr AgeTot Total age
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Acknowledgements:
Gabriel Lauffer Ramos, gabriel.lauffer(at)ufrgs.br
(End) Gabriel Lauffer Ramos [UFRGS], Patricia Vannier [CDS] 24-Sep-2018