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Query : 2006MNRAS.371..263L |
2006MNRAS.371..263L - Mon. Not. R. Astron. Soc., 371, 263-282 (2006/September-1)
The mass of helium in white dwarf stars and the formation and evolution of hydrogen-deficient post-AGB stars.
LAWLOR T.M. and MacDONALD J.
Abstract (from CDS):
We find that our predicted abundances for PG1159 stars agree within the error bars with the observed abundances, without the need of convective overshoot. We also find that nitrogen is produced during VLTPs but not in the other evolutionary paths to hydrogen-deficient objects. Hence, we propose this as the reason why nitrogen is observed in some PG1159 stars but not all. Our VLTP models also produce surface abundances close to those of the low-gravity hybrid PG1159 stars.
An inconsistency between asteroseismological and our evolutionary model determinations of helium layer mass remains.
Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS
Journal keyword(s): stars: AGB and post-AGB - stars: evolution - white dwarfs
Simbad objects: 13
Number of rows : 13 |
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 | GD 1088 | WD* | 01 32 39.347 | -19 21 40.38 | 15.51 | 15.77 | 15.77 | PG1159 | 47 | 0 | ||
2 | NAME LMC | G | 05 23 34.6 | -69 45 22 | 0.4 | ~ | 17428 | 0 | ||||
3 | PN A66 30 | PN | 08 46 53.4639874872 | +17 52 46.369394580 | 14.23 | 14.30 | 13.47 | [WC5] | 411 | 0 | ||
4 | SDSS J110215.45+024034.1 | HS* | 11 02 15.4576572936 | +02 40 34.333042044 | sdOHe | 19 | 0 | |||||
5 | PG 1144+005 | WD* | 11 46 35.2284791112 | +00 12 33.539992056 | 14.922 | 15.233 | PG1159 | 89 | 0 | |||
6 | V* GW Vir | WD* | 12 01 45.9731868264 | -03 45 40.628670300 | 14.87 | 15.04 | DOQZ1 | 490 | 0 | |||
7 | M 5 | GlC | 15 18 33.22 | +02 04 51.7 | 5.95 | ~ | 1977 | 0 | ||||
8 | GD 358 | WD* | 16 47 18.3925183824 | +32 28 32.862804384 | 12.511 | 13.530 | 13.653 | 13.752 | 13.852 | DB2 | 350 | 0 |
9 | V* V4334 Sgr | CV* | 17 52 32.69352 | -17 41 08.0160 | F2Ia | 372 | 0 | |||||
10 | PN A66 58 | PN | 19 18 20.476 | +01 46 59.62 | [WC4] | 315 | 0 | |||||
11 | Hen 1-5 | pA* | 20 11 56.0595568008 | +20 20 04.420944132 | 11.41 | 10.66 | 9.45 | G8/K0Iae | 507 | 0 | ||
12 | PN A66 78 | PN | 21 35 29.3816259120 | +31 41 45.449196108 | 13.04 | 13.25 | [WC5] | 326 | 0 | |||
13 | V* V409 And | WD* | 23 27 15.9353097240 | +40 01 23.429781408 | 14.1 | 15.41 | DO | 79 | 0 |
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