2007A&A...465..249A


Query : 2007A&A...465..249A

2007A&A...465..249A - Astronomy and Astrophysics, volume 465, 249-255 (2007/4-1)

The age and colors of massive white dwarf stars.

ALTHAUS L.G., GARCIA-BERRO E., ISERN J., CORSICO A.H. and ROHRMANN R.D.

Abstract (from CDS):

We present evolutionary calculations and colors for massive white dwarfs with oxygen-neon cores for masses between 1.06 and 1.28M. The evolutionary stages computed cover the luminosity range from log(L/L)≃0.5 down to -5.2. Our cooling sequences are based on evolutionary calculations that take into account the chemical composition expected from massive white dwarf progenitors that burned carbon in partially degenerate conditions. The use of detailed non-gray model atmospheres provides us with accurate outer boundary conditions for our evolving models at low effective temperatures. We examine the cooling age, colors and magnitudes of our sequences. We find that massive white dwarfs are characterized by very short ages to such an extent that they reach the turn-off in their colors and become blue at ages well below 10Gyr. Extensive tabulations for massive white dwarfs, accessible from our web site, are also presented.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: white dwarfs - stars: interiors

VizieR on-line data: <Available at CDS (J/A+A/465/249): table1.dat>

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 PG 0136+251 WD* 01 38 52.9776840264 +25 23 22.640581464   15.83       DA1.2 84 0
2 Wolf 82 WD* 01 46 41.3127315600 +21 54 48.381282072   15.30   15.1   DA5.4 45 0
3 V* CL Oct WD* 03 17 15.8468594712 -85 32 25.558244556   13.78 13.66 15.19   DAP 164 1
4 LB 9802 WD* 03 17 19.1282833488 -85 32 31.288377552   13.78 13.66 14.43   DA 132 1
5 GD 50 WD* 03 48 50.1859724280 -00 58 32.290187664 12.596 13.787 14.063 14.210 14.388 DA1.2 260 1
6 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3094 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17552 0
8 EGGR 484 WD* 06 47 22.1508576098 +02 31 08.914947169   16.00   15.7   DA7.0 52 0
9 L 886-6 WD* 07 01 54.8387102144 -06 27 46.230821653   16.2 15.42     DA7.6 45 0
10 PG 0928+085 WD* 09 31 08.6584151568 +08 19 31.912603680   16.22       DA1.7 15 0
11 PG 1058-129 WD* 11 01 12.2408647608 -13 14 42.227355444   15.11 14.93 14.8   DA2.0 29 0
12 PG 1237-029 WD* 12 40 09.5527995480 -03 10 14.173232880   16.04 15.90 15.7   DA4.9 41 0
13 PG 1533-057 WD* 15 36 34.9216754616 -05 52 40.016244216   15.32 15.2     DAP3 40 0
14 EGGR 117 WD* 16 11 25.6063713071 +13 22 17.937724651   15.33   15.2   DA5.4 77 0
15 PG 1658+441 WD* 16 59 48.4241073768 +44 01 04.038522204   14.3 14.6     DAP1.6 143 0
16 PB 8040 WD* 23 52 31.9204033479 -02 53 11.748295660   17.1 16.99 17.1   DA4.7 41 0

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