J/A+A/549/A102 White dwarf cooling sequences (Bono+, 2013)
On the white dwarf cooling sequence with extremely large telescopes.
Bono G., Salaris M., Gilmozzi R.
<Astron. Astrophys. 549, A102 (2013)>
=2013A&A...549A.102B 2013A&A...549A.102B
ADC_Keywords: Stars, white dwarf ; Models, evolutionary ; Magnitudes, absolute
Keywords: stars: evolution - white dwarfs - stars: distances - stars: imaging -
globular clusters: general
Abstract:
We present new diagnostics of white dwarf (WD) cooling sequences and
luminosity functions (LFs) in the near-infrared (NIR) bands that will
exploit the sensitivity and resolution of future extremely large
telescopes. The collision-induced absorption (CIA) of molecular
hydrogen causes a clearly defined blue turn-off along the WD (WDBTO)
cooling sequences and a bright secondary maximum in the WD LFs. These
features are independent of age over a broad age range and are
minimally affected by metal abundance. This means that the NIR
magnitudes of the WDBTO are very promising distance indicators.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
iso.dat 104 15114 White Dwarf isochrones
lf.dat 24 1167 Luminosity functions
files/* . 37 Individual files + readme
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Byte-by-byte Description of file (# are comments): iso.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- Z Initial metallicity, Z (0.0003, 0.008, 0.02=Sun)
8- 9 I2 Gyr t Age (isochrone value: 7,8,9,10,12,14)
13- 22 F10.8 Msun Mini Initial mass
24- 32 F9.7 Msun Mwd White dwarf mass
35- 40 F6.4 [K] log(Te) Decimal logarithm of the effective temperature
42- 48 F7.4 [Lsun] log(L) Decimal logarithm of the luminosity
50- 55 F6.3 mag UMAG Johnson system U-band absolute magnitude
57- 62 F6.3 mag BMAG Johnson system B-band absolute magnitude
64- 69 F6.3 mag VMAG Johnson system V-band absolute magnitude
71- 76 F6.3 mag RMAG Johnson system R-band absolute magnitude
78- 83 F6.3 mag IMAG Johnson system I-band absolute magnitude
85- 90 F6.3 mag JMAG Johnson system J-band absolute magnitude
92- 97 F6.3 mag HMAG Johnson system H-band absolute magnitude
99-104 F6.3 mag KMAG Johnson system K-band absolute magnitude
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Byte-by-byte Description of file (# are comments): lf.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- Z Initial metallicity, Z (0.0003, 0.008, 0.02=Sun)
8- 9 I2 Gyr t Age (isochrone value: 7,8,9,10,12,14)
11- 15 F5.2 mag KMAG Johnson system K-band absolute magnitude
18- 24 F7.4 [-] logN log of number of stars per magnitude interval
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History:
* 14-Jan-2013: from Giuseppe Bono, bono(at)roma2.infn.it
* 18-Jun-2013: corrected values of metallicity (are 3x10-4, 0.008, 0.02)
(End) Patricia Vannier [CDS] 14-Jan-2013