2002A&A...382..164S

Query : 2002A&A...382..164S

2002A&A...382..164S - Astronomy and Astrophysics, volume 382, 164-173 (2002/1-4)

Equilibrium abundances in hot DA white dwarfs as derived from self-consistent diffusion models I. Analysis of spectroscopic EUVE data.

SCHUH S.L., DREIZLER S. and WOLFF B.

Abstract (from CDS):

We present the first analysis of an EUV selected sample of hot DA white dwarfs using a new type of atmospheric models. These models take into account the interplay between gravitational settling and radiative acceleration to predict the chemical stratification from an equilibrium between the two forces while self-consistently solving for the atmospheric structure. In contrast to atmospheric models with the assumption of chemical homogeneity, the number of free parameters in the new models is reduced to the effective temperature and surface gravity alone. The overall good reproduction of observed EUV spectra reveals that these models are able to describe the physical conditions in hot DA white dwarf atmospheres correctly. A comparison with previous analyses highlights the improvements as well as the limits of our new models.

Abstract Copyright: ∼

Journal keyword(s): white dwarfs - stars: fundamental parameters - stars: abundances - stars: atmospheres - diffusion

Simbad objects: 26

Full paper

View the references in ADS

Number of rows : 26

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	GD 2	WD*	00 07 32.2596160176	+33 17 27.605949792	12.321	13.482	13.791	13.940	14.119	DA1.0	98	0
2	MCT 0027-6341	WD*	00 29 56.7251246112	-63 24 58.003740036		15.010	15.307	15.536		DA.8	46	0
3	GD 984	WD*	01 34 24.0732015168	-16 07 08.095946556		13.6	13.98	14.3		DA1+dM	70	0
4	V* FS Cet	WD*	02 35 07.5939240480	+03 43 56.816311296	11.027	12.209	12.412	12.325	11.968	DA1+dM	366	0
5	MCT 0455-2812	WD*	04 57 13.3208333976	-28 07 52.750783812	12.44	13.65	13.92	14.23		DA.8	113	0
6	BD+52 913	WD*	05 05 30.6180977592	+52 49 51.919301604	10.25	11.44	11.69	11.93	12.108	DA.8	1070	0
7	RX J0623.2-3741	WD*	06 23 12.6177525552	-37 41 28.043049264		11.88	12.42	12.6		DA.8	104	0
8	RX J0632.9-0506	WD*	06 32 57.7842858456	-05 05 49.360648668		15.7	15.537	16.0		DA1.1	30	0
9	RX J0715.3-7025	WD*	07 15 16.5785943888	-70 25 05.616247620		13.97	14.178	14.12		DA1	52	0
10	RX J0841.0+0320	WD*	08 41 03.4311724896	+03 20 57.719634324			14.48			DA1.3	32	0
11	SBSS 1029+537	WD*	10 32 09.9865348944	+53 29 35.373072660		14.095	14.453	14.831		DA1.1	86	0
12	LB 1919	WD*	10 59 16.4293648440	+51 24 43.125083064		15.5	16.8			DA.7	56	0
13	PG 1057+719	WD*	11 00 34.2431647104	+71 38 02.920054596		14.95	14.68	15.23		DA1.2	72	0
14	PG 1123+189	CV*	11 26 19.095480	+18 39 16.56900		13.94	14.10	14.31		~	64	0
15	PG 1234+482	WD*	12 36 45.1436139768	+47 55 22.218366900			14.38			DA.9	93	2
16	HZ 43A	WD*	13 16 21.8532409720	+29 05 55.411186877		12.52	12.66			DAwk	466	0
17	RX J1546.9-3646	WD*	15 46 58.2731268456	-36 46 42.579623496		15.7	15.81			DA1.1	32	0
18	RX J1629.0+7804	WD*	16 29 10.278576	+78 04 39.91620		12.74	12.95	13.03		DA1.2	85	0
19	EC 20048-6034	WD*	20 09 05.6036730480	-60 25 42.533556924	11.94	13.11	13.39	13.69		DA1.2	65	0
20	GD 394	WD*	21 12 44.0371201584	+50 06 17.887239540	11.70	12.85	13.09			DA1.3	177	1
21	EC 21529-5452	WD*	21 56 21.2576687736	-54 38 23.017341192	13.11	14.29	14.58			DA1	55	0
22	RX J2214.1-4918	WD*	22 14 11.9175658032	-49 19 27.216388524		11.28	11.57	11.7		DA.7	112	0
23	Lan 23	WD*	22 49 52.3672810920	+58 34 32.038383144	12.80	13.98	14.19	14.78		DA.9	42	0
24	GD 246	WD*	23 12 21.6158334024	+10 47 04.257295476	11.578	12.772	13.090	13.238	13.418	DA.9	211	0
25	EC 23216-5458	WD*	23 24 30.8622650808	-54 41 35.509543332		14.91	15.13	15.72		DA1.1	53	0
26	LB 1526	WD*	23 34 02.1941290399	-47 14 26.645931358		13.131	13.422	13.762		DA.9	75	0

To bookmark this query, right click on this link: simbad:objects in 2002A&A...382..164S and select 'bookmark this link' or equivalent in the popup menu