2021ApJ...914...61K

Query : 2021ApJ...914...61K

2021ApJ...914...61K - Astrophys. J., 914, 61-61 (2021/June-2)

Discovery of beryllium in white dwarfs polluted by planetesimal accretion.

KLEIN B.L., DOYLE A.E., ZUCKERMAN B., DUFOUR P., BLOUIN S., MELIS C., WEINBERGER A.J. and YOUNG E.D.

Abstract (from CDS):

The element beryllium is detected for the first time in white dwarf stars. This discovery in the spectra of two helium-atmosphere white dwarfs was made possible only because of the remarkable overabundance of Be relative to all other elements, heavier than He, observed in these stars. The measured Be abundances, relative to chondritic, are by far the largest ever seen in any astronomical object. We anticipate that the Be in these accreted planetary bodies was produced by spallation of one or more of O, C, and N in a region of high fluence of particles of MeV or greater energy.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): White dwarf stars - Abundance ratios - Overabundances - High resolution spectroscopy - Stellar spectral lines - Stellar accretion - Planetesimals - Extrasolar rocky planets

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 Wolf 28 WD* 00 49 09.8983373329 +05 23 18.993828947 12.984 12.92 12.374 12.106 11.854 DZ7.5 266 0
2 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.479 15.384     DBZ4 187 0
3 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
4 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
5 GD 61 WD* 04 38 39.3740627256 +41 09 32.353957332 13.801 14.767 14.879 14.932 14.970 DBAZ3 112 0
6 HE 0446-2531 WD* 04 49 01.4020207176 -25 26 36.268538172   16.9   16.5   DBAZ 26 0
7 GALEX J073842.6+183509 WD* 07 38 42.5662133112 +18 35 09.713206464           DBZ 67 0
8 LAWD 25 WD* 07 40 20.7886676070 -17 24 49.156867583   13.36 13.061 12.886 12.70 DZQA6 218 0
9 Ton 345 WD* 08 45 39.1819378488 +22 57 28.251061956   15.2 16.07     DB 89 0
10 LP 614-59 WD* 12 14 56.3828498044 -02 34 02.838235659   17.7 17.85     DZP 49 0
11 PG 1225-079 WD* 12 27 47.3585913504 -08 14 37.972720428   14.86 14.74 15.15   DZA4 85 0
12 SBSS 1240+527 WD* 12 42 31.0898339136 +52 26 26.609640108   18.2   18.2   DABZ 38 0
13 G 165-7 WD* 13 30 59.4185829051 +30 29 53.651822645   16.73 16.04 15.74 15.60 DZ7 84 0
14 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
15 G 200-39 WD* 14 27 36.1747969268 +53 48 28.004467199   14.86 14.99 15.35   DBAZ4 109 0
16 G 200-40 PM* 14 27 37.0734317399 +53 47 49.061841477   13.19 11.90 11.509   sdM 30 0
17 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 220 0
18 PSO J251.0712-04.8300 WD* 16 44 17.0173964976 -04 49 47.713115460           DZ 9 0
19 LP 276-33 WD* 16 54 45.6926039157 +38 29 36.628370427   17.1 15.86 16.5   DZA 63 0
20 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 200 0
21 GD 378 WD* 18 23 37.0114872120 +41 04 02.107466472 13.246 14.208 14.288 14.324 14.379 DBAZ4 84 0
22 GALEX J193156.8+011745 WD* 19 31 56.9316163968 +01 17 44.107104876     14.20     DAZ 79 1
23 G 241-6 WD* 22 23 33.1053008448 +68 37 24.282156972   15.7 15.65 15.7   DB 52 0
24 GALEX J233917.0-042425 WD* 23 39 17.0285016648 -04 24 24.665073228   16.0   16.2   DBAZ: 20 0

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