2006ApJ...653..613J

Query : 2006ApJ...653..613J

2006ApJ...653..613J - Astrophys. J., 653, 613-620 (2006/December-2)

Carbon deficiency in externally polluted white dwarfs: evidence for accretion of asteroids.

JURA M.

Abstract (from CDS):

Existing determinations show that n(C)/n(Fe) is more than a factor of 10 below solar in the atmospheres of three white dwarfs that appear to be externally polluted. These results are not easily explained if the stars have accreted interstellar matter, and we reinterpret these measurements as evidence that these stars have accreted asteroids with a chondritic composition.

Abstract Copyright: ∼

Journal keyword(s): Stars: Planetary Systems - Stars: White Dwarfs

Simbad objects: 9

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Number of rows : 9
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 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.479 15.384     DBZ4 187 0
2 GD 56 WD* 04 11 02.1686667960 -03 58 22.586865708   15.64 15.50 15.1   DA3.3 92 0
3 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 220 0
4 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 200 0
5 NGC 6633 47 * 18 26 32.2712411664 +06 23 08.952117000   11.380 10.933 10.832   A9 39 0
6 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
7 LAWD 91 WD* 22 19 48.3089909755 -65 29 17.484537097 13.98 14.66 14.53     DZ5 61 0
8 HS 2253+8023 WD* 22 54 35.7124764456 +80 39 53.794385208   16.02 16.11     DBAZ3.4 47 0
9 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0

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