2007ApJ...663.1285J

Query : 2007ApJ...663.1285J

2007ApJ...663.1285J - Astrophys. J., 663, 1285-1290 (2007/July-2)

Externally polluted white dwarfs with dust disks.

JURA M., FARIHI J. and ZUCKERMAN B.

Abstract (from CDS):

We report Spitzer Space Telescope photometry of 11 externally polluted white dwarfs. Of the nine stars for which we have IRAC photometry, we find that GD 40, GD 133, and PG 1015+161 each has an infrared excess that can be understood as arising from a flat, opaque, dusty disk. GD 56 also has an infrared excess characteristic of circumstellar dust, but a flat-disk model cannot reproduce the data unless there are grains as warm as 1700 K and perhaps not even then. Our data support the previous suggestion that the metals in the atmosphere of GD 40 are the result of accretion of a tidally disrupted asteroid with a chondritic composition.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - Minor Planets, Asteroids - Stars: White Dwarfs

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 EGGR 168 WD* 02 11 20.8420869594 +39 55 21.516404474   14.80 14.50 14.4   DAZ6.9 121 0
2 EGGR 565 WD* 02 46 30.8013110459 -02 27 23.461070842   16.34 15.38   15.09 DA7.4 72 0
3 EGGR 473 WD* 02 48 36.4291217434 +54 23 22.464606271   16.25   15.1   DAZ9 73 0
4 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.479 15.384     DBZ4 187 0
5 GD 56 WD* 04 11 02.1686667960 -03 58 22.586865708   15.64 15.50 15.1   DA3.3 92 0
6 PG 1015+161 WD* 10 18 03.8273436048 +15 51 58.566029940   15.596 15.607 16.000   DA2.5 92 0
7 GD 133 WD* 11 19 12.3988618680 +02 20 33.045927216   14.734 14.617 14.855   DA4.0 107 0
8 Ruiz 439-80 WD* 11 27 09.2523446398 -29 40 11.199558503   15.02 15.02 14.8   DA5.3 54 1
9 EC 11507-1519 WD* 11 53 15.2581290960 -15 36 36.506488428   16.16 16.00 15.9   DA4.0 61 0
10 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 73 0
11 LP 734-74 WD* 12 06 56.2914581818 -13 53 53.037650505   15.72 15.53 15.6   DA4.4 37 0
12 HE 1225+0038 WD* 12 28 07.7276728272 +00 22 19.623383832   15.2   15.1   DAZ 37 1
13 GALEX J122859.9+104032 WD* 12 28 59.9341604496 +10 40 33.045988944           DAZe: 152 0
14 EGGR 94 WD* 12 59 46.6567450670 +27 34 04.137867253   15.68   15.0   DAZ5.9 80 0
15 HE 1315-1105 WD* 13 17 47.2436645472 -11 21 06.028259904   15.8   15.6   DAZ 31 0
16 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 234 0
17 EGGR 298 WD* 14 58 06.4884482642 +29 37 29.515263565   15.86   15.3   DA6.8 99 0
18 PG 1457-086 WD* 14 59 52.9901145672 -08 49 29.645894676   15.68 15.77 15.8   DA2.3 51 0
19 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 200 0
20 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 96 0
21 LAWD 89 WD* 21 47 37.2893176824 -07 44 12.210487188 13.752 14.77 14.83 14.96 14.889 DB0 71 0
22 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 213 0
23 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
24 PG 2354+159 WD* 23 56 34.7462697000 +16 15 40.257339876   15.78   16.15   DBZ 30 0

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