2006A&A...453.1051K

C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:07:38

2006A&A...453.1051K - Astronomy and Astrophysics, volume 453, 1051-1057 (2006/7-3)

The accretion-diffusion scenario for metals in cool white dwarfs.

KOESTER D. and WILKEN D.

Abstract (from CDS):

We calculated diffusion timescales for Ca, Mg, Fe in hydrogen atmosphere white dwarfs with temperatures between 5000 and 25000K. With these timescales we determined accretion rates for a sample of 38 DAZ white dwarfs from the recent studies of Zuckerman et al. (2003ApJ...596..477Z) and Koester et al. (2005A&A...432.1025K). Assuming that the accretion rates can be calculated with the Bondi-Hoyle formula for hydrodynamic accretion, we obtained estimates for the interstellar matter density around the accreting objects. These densities are in good agreement with new data about the warm, partially ionized phase of the ISM in the solar neighborhood.

Abstract Copyright: ∼

Journal keyword(s): stars: white dwarfs - stars: abundances

CDS comments: Tables 1,3 : WD 0208+296 is a probable misprint for WD 0208+396.

Simbad objects: 41

Full paper

View the reference in ADS

Number of rows : 41

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2021	#notes
1	EGGR 511	WD*	00 35 17.5121261837	-17 18 51.573214772		15.17	14.9	14.7		DA5.1	42	1
2	HS 0047+1903	WD*	00 50 12.4544165064	+19 19 48.509321339		15.94	15.59	16.0		DAZ	12	0
3	Ton S 193	WD*	01 08 36.0346386218	-32 37 43.381351071		15.34	15.26	15.86		DAZ	25	0
4	EGGR 168	WD*	02 11 20.8420180006	+39 55 21.515685472		14.80	14.50	14.4		DAZ6.9	101	0
5	PG 0235+064	WD*	02 38 30.9279373499	+06 37 59.840264764		15.53	15.09			DA3.5	29	0
6	EGGR 565	WD*	02 46 30.8013439138	-02 27 23.459927248		16.34	15.38		15.09	DA7.4	58	0
7	EGGR 473	WD*	02 48 36.4289567406	+54 23 22.463731008		16.25		15.1		DAZ9	58	0
8	HS 0307+0746	WD*	03 10 09.1588235887	+07 57 32.076872124		17.1		16.6		DAZ	19	0
9	GD 56	WD*	04 11 02.1685298491	-03 58 22.586560976		15.64	15.50	15.1		DA3.3	69	0
10	NAME LIC	Cld	04 41	+31.						~	253	0
11	GD 290	WD*	05 47 56.3425295091	+57 59 22.477457044		16.0				DA5.1	33	0
12	Ton 953	WD*	08 49 09.4772044410	+34 29 47.733686377		15.99	15.72			DA6.6	50	0
13	PG 1015+161	WD*	10 18 03.8271425956	+15 51 58.565078247		15.70		15.2		DA2.5	65	0
14	EC 11023-1821	WD*	11 04 46.8829242759	-18 37 13.124225088		16.25	15.99	15.6		DA6.1	24	0
15	GD 133	WD*	11 19 12.3989572558	+02 20 33.046829334		14.76	14.57	14.8		DA4.0	78	0
16	Ruiz 439-80	WD*	11 27 09.2524670230	-29 40 11.198530827		15.02	15.02	14.8		DA5.3	39	1
17	EC 11507-1519	WD*	11 53 15.2581059987	-15 36 36.505821827		16.16	16.00	15.9		DA4.0	45	0
18	LP 852-7	WD*	12 05 26.6739742867	-23 33 12.140186272		13.04	12.90	12.66	12.52	DA5.7	44	0
19	LP 734-74	WD*	12 06 56.2916485636	-13 53 53.042045072		15.72	15.53	15.6		DA4.4	27	0
20	G 197-47	WD*	12 11 29.2733579667	+57 24 17.243305492		16.34		15.3		DA8.6	48	0
21	HE 1225+0038	WD*	12 28 07.7274384270	+00 22 19.624696701		15.2		15.1		DAZ	23	1
22	EGGR 94	WD*	12 59 46.6566571330	+27 34 04.140165462		15.68		15.0		DAZ5.9	62	0
23	HE 1315-1105	WD*	13 17 47.2437026737	-11 21 06.029306163		15.8		15.6		DAZ	20	0
24	LAWD 52	WD*	13 38 50.4780798626	+70 17 07.641423392	11.807	12.54	12.60	13.01	12.979	DA2.4	200	0
25	EGGR 360	WD*	13 47 24.3695836668	+10 21 38.011535761		15.49		14.8		DA7.1	87	0
26	PG 1407+425	WD*	14 09 45.2394502852	+42 16 00.654922169			14.98			DA5.0	36	0
27	EGGR 298	WD*	14 58 06.4884281478	+29 37 29.515415393		15.86		15.3		DA6.8	82	0
28	PG 1457-086	WD*	14 59 52.9904888426	-08 49 29.647009899		15.68	15.77	15.8		DA2.3	41	0
29	PG 1614+160	WD*	16 17 08.7453505426	+15 54 38.497737294		16.08		15.7		DA2.8	24	0
30	PG 1633+434	WD*	16 35 01.4290922778	+43 17 36.346161096		15.26		14.5		DAZ7.6	69	0
31	GD 362	WD*	17 31 34.3169169136	+37 05 20.709668210		16.3		16.4		DAZB	153	0
32	EGGR 176	WD*	18 24 04.5487043531	-13 08 42.294195385		16.02	15.60			DA7.8	23	0
33	EGGR 126	WD*	18 29 09.8621857317	-04 29 35.487964512		14.82	14.57	14.74		DA5.4	46	0
34	EGGR 580	WD*	19 00 17.2959756628	+39 22 35.250835923		16.7		15.6		DA5.3	29	0
35	LAWD 84	WD*	21 19 36.5324188585	-55 50 14.465612769	13.94	14.50	14.27	14.5		DA5.1	70	0
36	HS 2132+0941	WD*	21 34 50.8136203554	+09 55 20.256984796		15.7		15.4		DAZ	21	0
37	EGGR 150	WD*	21 52 25.3788480672	+02 23 19.576520492	11.942	12.732	12.743	12.839	12.938	DA2.8	168	0
38	PHL 5103	WD*	22 24 17.4346134332	-16 15 47.163935881		16.30	16.02	16.25	15.90	DAZ	25	0
39	HS 2229+2335	WD*	22 31 45.4682773516	+23 51 23.360462985		16.02	16.01	16.37		DAZ	19	0
40	V* ZZ Psc	WD*	23 28 47.6364608228	+05 14 54.234982405		13.17		13.0		DA4.1	446	0
41	NAME Local Bubble	ISM	~	~						~	718	0

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