2006AJ....131..640D


Query : 2006AJ....131..640D

2006AJ....131..640D - Astron. J., 131, 640-647 (2006/January-0)

Cool customers in the stellar graveyard. III. Limits to substellar objects around nearby white dwarfs using the Canada-France-Hawaii telescope.

DEBES J.H., GE J. and FTACLAS C.

Abstract (from CDS):

Result. from a ground-based high-contrast imaging survey of 13 nearby white dwarfs for substellar objects are presented. We place strict upper limits on the type of substellar objects present, ruling out the presence of anything larger than ∼14MJ for eight of the white dwarfs at separations >19 AU and corresponding to primordial separations of ∼3-6 AU assuming adiabatic mass loss without tidal interactions. With these results we place the first upper limit on the number of intermediate-mass stars with brown dwarfs at separations >13 AU. We combine these results with previous work to place upper limits on the number of massive Jovian (>10MJ) planets in orbit around white dwarfs whose progenitors spanned a mass range of 1-7 M.

Abstract Copyright:

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

Nomenclature: Table 3: DGF N (Nos 1-7). Fig.2: DGF WD 2341+321 CN (Nos C1-C2). Fig.5 DGF WD 0208+395 CN (Nos C1-C2).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 22

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Number of rows : 22
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 DSW 1 G 02 11 20.5 +39 55 14           ~ 2 0
2 EGGR 168 WD* 02 11 20.8420869594 +39 55 21.516404474   14.80 14.50 14.4   DAZ6.9 107 0
3 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1059 0
4 EGGR 250 WD* 09 15 56.0774298887 +53 25 23.857612513   14.09   14.1   DCP7 139 0
5 DGF 2 ? 10 57 34.63 -07 31 13.8           ~ 1 0
6 DGF 1 ? 10 57 34.75 -07 31 22.8           ~ 1 0
7 LAWD 34 WD* 10 57 35.1341950895 -07 31 23.176779615 14.078 14.626 14.338 14.132 13.921 DC 77 0
8 DGF 3 ? 10 57 35.15 -07 31 11.5           ~ 1 0
9 DGF 4 ? 11 24 12.82 +21 21 23.9           ~ 1 0
10 Ross 627 WD* 11 24 12.9710801226 +21 21 35.569805995       14.28   DA6.8 113 0
11 V* EG UMa WD* 12 15 44.0979312096 +52 31 01.289011692   13.0 13.230 13.149   DA+dM 107 1
12 Wolf 489 WD* 13 36 31.8521839520 +03 40 45.942173346   15.66   14.48   DC9 112 0
13 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 193 0
14 EGGR 258 WD* 16 34 21.5518633862 +57 10 08.868180953   15.49   14.9   DQ8 117 0
15 PG 1633+434 WD* 16 35 01.4291783063 +43 17 36.347179696   15.26   14.5   DAZ7.6 73 0
16 LAWD 79 WD* 19 56 29.2263375910 -01 02 32.671070269   13.89 13.56 13.73   DA6.4 133 0
17 DGF 5 ? 21 42 40.97 +20 59 49.5           ~ 1 0
18 EGGR 148 WD* 21 42 41.0063054408 +20 59 58.123903616   13.40   12.9   DQ6 113 0
19 DGF 6 ? 21 42 41.71 +20 59 46.9           ~ 1 0
20 EGGR 155 WD* 22 49 05.5507896558 +22 36 31.991540832   14.55   13.8   DA4.7 97 0
21 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.17   13.0   DA4.1 470 0
22 LAWD 93 WD* 23 43 50.7212145360 +32 32 46.728318300   13.06 12.94 13.12   DA3.8 141 0

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2023.02.05-12:21:21

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