1J/A+A/557/A19   Mass and age of extreme low-mass white dwarfs   (Althaus+, 2013)
2================================================================================
3New evolutionary sequences for extremely low-mass white dwarfs: Homogeneous mass
4and age determinations and asteroseismic prospects.
5    Althaus L.G., Miller Bertolami M.M., Corsico A.H.
6   <Astron. Astrophys. 557, A19 (2013)>
7   =2013A&A...557A..19A
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9ADC_Keywords: Stars, white dwarf ; Models, evolutionary ; Stars, masses ;
10              Stars, ages ; Effective temperatures
11Keywords: white dwarfs - binaries: general - stars: evolution -
12          stars: oscillations - stars: interiors
13
14Abstract:
15    The number of detected extremely low mass (ELM) white dwarf stars has
16    increased drastically in recent year thanks to the results of many
17    surveys. In addition, some of these stars have been found to exhibit
18    pulsations, making them potential targets for asteroseismology.
19
20    We provide a fine and homogeneous grid of evolutionary sequences for
21    helium (He) core white dwarfs for the whole range of their expected
22    masses (0.15<~M_*_/M_{sun}_<~0.45), including the mass range for ELM
23    white dwarfs (M_*_/M_{sun}_<~0.20). The grid is appropriate for mass
24    and age determination of these stars, as well as to study their
25    adiatabic pulsational properties.
26
27    White dwarf sequences have been computed by performing full
28    evolutionary calculations that consider the main energy sources and
29    processes of chemical abundance changes during white dwarf evolution.
30
31Description:
32    In file elm.dat are data presented in the middle and lower panels of
33    Fig. 5 and 6.
34
35File Summary:
36--------------------------------------------------------------------------------
37 FileName   Lrecl  Records   Explanations
38--------------------------------------------------------------------------------
39ReadMe         80        .   This file
40elm.dat       133     4183   Interpolated M(logTeff, logg) relation
41--------------------------------------------------------------------------------
42
43See also:
44      III/235   : Spectroscopically Identified White Dwarfs (McCook+, 2008)
45 J/ApJ/730/67   : Radial velocities of low-mass white dwarfs (Brown+, 2011)
46 J/ApJ/731/17   : Variability of low-mass stars in SDSS Stripe 82 (Becker+ 2011)
47 J/ApJ/723/1072 : The ELM survey. I. Low-mass white dwarfs (Brown+, 2010)
48
49Byte-by-byte Description of file: table2.dat
50--------------------------------------------------------------------------------
51   Bytes Format  Units    Label     Explanations
52--------------------------------------------------------------------------------
53   1- 18 F18.16  [K]      logTe     [3.85,4.79] Log of effective temperature
54  20- 37 F18.16  [cm/s2]  logg      [3,7.7] Surface gravity
55  39- 58 F20.17  Msun     Mass      [0.1/0.6]?=-1 Mass fit
56  60- 83 E24.18  Msun   e_Mass      ?=-1 Mass fit error
57  85-108 E24.18  Myr      Age       ?=-1 Age fit
58 110-133 E24.18  Myr    e_Age       ?=-1 Age fit error
59--------------------------------------------------------------------------------
60
61Acknowledgements:
62   Leandro G. Althaus, althaus( at )fcaglp.unlp.edu.ar,
63                               Universidad Nacional de La Plata
64
65================================================================================
66(End)                                     Emmanuelle Perret [CDS]    16-Jul-2013
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683.8500000000000001|3.0000000000000000| 0.24458909000000001|3.78770000000000018E-003|      34.946352740000002|      8.2766551100000001
69