J/A+A/557/A19   Mass and age of extreme low-mass white dwarfs   (Althaus+, 2013)
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New evolutionary sequences for extremely low-mass white dwarfs: Homogeneous mass
and age determinations and asteroseismic prospects.
    Althaus L.G., Miller Bertolami M.M., Corsico A.H.
   <Astron. Astrophys. 557, A19 (2013)>
   =2013A&A...557A..19A
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ADC_Keywords: Stars, white dwarf ; Models, evolutionary ; Stars, masses ;
              Stars, ages ; Effective temperatures
Keywords: white dwarfs - binaries: general - stars: evolution -
          stars: oscillations - stars: interiors

Abstract:
    The number of detected extremely low mass (ELM) white dwarf stars has
    increased drastically in recent year thanks to the results of many
    surveys. In addition, some of these stars have been found to exhibit
    pulsations, making them potential targets for asteroseismology.

    We provide a fine and homogeneous grid of evolutionary sequences for
    helium (He) core white dwarfs for the whole range of their expected
    masses (0.15<~M_*_/M_{sun}_<~0.45), including the mass range for ELM
    white dwarfs (M_*_/M_{sun}_<~0.20). The grid is appropriate for mass
    and age determination of these stars, as well as to study their
    adiatabic pulsational properties.

    White dwarf sequences have been computed by performing full
    evolutionary calculations that consider the main energy sources and
    processes of chemical abundance changes during white dwarf evolution.

Description:
    In file elm.dat are data presented in the middle and lower panels of
    Fig. 5 and 6.

File Summary:
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 FileName   Lrecl  Records   Explanations
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ReadMe         80        .   This file
elm.dat       133     4183   Interpolated M(logTeff, logg) relation
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See also:
      III/235   : Spectroscopically Identified White Dwarfs (McCook+, 2008)
 J/ApJ/730/67   : Radial velocities of low-mass white dwarfs (Brown+, 2011)
 J/ApJ/731/17   : Variability of low-mass stars in SDSS Stripe 82 (Becker+ 2011)
 J/ApJ/723/1072 : The ELM survey. I. Low-mass white dwarfs (Brown+, 2010)

Byte-by-byte Description of file: table2.dat
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   Bytes Format  Units    Label     Explanations
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   1- 18 F18.16  [K]      logTe     [3.85,4.79] Log of effective temperature
  20- 37 F18.16  [cm/s2]  logg      [3,7.7] Surface gravity
  39- 58 F20.17  Msun     Mass      [0.1/0.6]?=-1 Mass fit
  60- 83 E24.18  Msun   e_Mass      ?=-1 Mass fit error
  85-108 E24.18  Myr      Age       ?=-1 Age fit
 110-133 E24.18  Myr    e_Age       ?=-1 Age fit error
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Acknowledgements:
   Leandro G. Althaus, althaus( at )fcaglp.unlp.edu.ar,
                               Universidad Nacional de La Plata

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(End)                                     Emmanuelle Perret [CDS]    16-Jul-2013
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3.8500000000000001|3.0000000000000000| 0.24458909000000001|3.78770000000000018E-003|      34.946352740000002|      8.2766551100000001