1999MNRAS.307..122M

Query : 1999MNRAS.307..122M

1999MNRAS.307..122M - Mon. Not. R. Astron. Soc., 307, 122-130 (1999/July-3)

The fraction of double degenerates among DA white dwarfs.

MAXTED P.F.L. and MARSH T.R.

Abstract (from CDS):

We present the results of a radial velocity survey designed to measure the fraction of double degenerates among DA white dwarfs. The narrow core of the Hα line was observed twice or more for 46 white dwarfs yielding radial velocities accurate to a few km.s–1. This makes our survey the most sensitive to the detection of double degenerates undertaken to date. We found no new double degenerates in our sample, though Hα emission from distant companions is seen in two systems. Two stars known to be double degenerates prior to our observations are included in the analysis. We find a 95per cent probability that the fraction of double degenerates among DA white dwarfs lies in the range [0.017, 0.19].

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): techniques: radial velocities - binaries: spectroscopic - stars: evolution - stars: rotation - supernovae: general - white dwarfs

Simbad objects: 59

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Number of rows : 59
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 LAWD 96 WD* 00 02 10.7241976499 -43 09 55.390578662   13.12 13.05     DAP5.8 134 0
2 WG 2 WD* 00 50 03.6496829856 -52 08 15.516264516 13.354 14.157 14.206 14.31 14.428 DA2.7 92 0
3 EGGR 7 WD* 01 03 49.9225512196 +05 04 30.568726390   14.295 13.972 14.030   DA5.9 102 0
4 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 191 0
5 GD 420 WD* 01 41 21.6192956088 +77 09 00.728192232   14.91   15.0   DA3.0 52 1
6 LP 941-91 WD* 02 28 27.2036713152 -32 42 33.795450828   13.72 13.84 14.12   DA2.1 24 0
7 Feige 22 WD* 02 30 16.6275391056 +05 15 50.696500968 11.939 12.746 12.798 12.901 13.004 DA2.5 141 0
8 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 299 0
9 WG 15 WD* 09 58 54.9418463856 -66 53 10.179562092   14.40 14.60     DA1.8 65 0
10 PG 1022+050 WD* 10 24 59.8281525960 +04 46 10.445657952   14.37 14.20 14.2   DA3.5 60 0
11 Ton 1323 WD* 11 04 32.5723321080 +36 10 48.873021996   14.76 14.49     DA3.7 75 0
12 PG 1149+058 WD* 11 51 54.2067404280 +05 28 39.584467236   15.14   15.07   DA4.4 52 0
13 Feige 55 WD* 12 04 38.5359546168 +60 32 08.086967232 11.974 13.224 13.568 13.717 13.896 DAO.9 84 0
14 PG 1204+451 WD* 12 06 47.5416434280 +44 49 54.411391920   14.61 14.37 13.9   DA2.1 40 0
15 PG 1210+141 WD* 12 12 33.8813053392 +13 46 24.901146300   14.38 14.71 14.9   DA1.6 28 1
16 EC 12336-1625 WD* 12 36 13.9039170288 -16 41 52.431956592   15.03 15.10 15.43   DA2.0 26 0
17 PG 1241-010 WD* 12 44 28.5731497128 -01 18 57.854663568   13.86 14.00 14.3   DA2.1 63 0
18 EC 13109-3035 WD* 13 13 41.5798021560 -30 51 33.708703536   14.43 14.92 14.5   DA2.4 32 0
19 LP 737-47 WD* 13 16 43.5975861665 -15 35 58.381299824   14.86 14.86 14.89 14.97 DA3.2 35 0
20 EGGR 188 WD* 13 19 13.7224549014 +45 05 09.802760414   14.16   14.3   DA3.6 65 0
21 BD-07 3632 WD* 13 30 13.6370112733 -08 34 29.468140653 11.803 12.398 12.340 12.39 12.436 DA3.5 203 0
22 LAWD 53 WD* 13 51 22.6873041720 -27 33 57.820912668   15.05 15.00 15.37 15.13 DA5.0 44 0
23 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 152 0
24 GD 194 WD* 15 52 26.3787120096 +18 10 18.689282184   14.94   15.2   DA3.4 58 0
25 L 202-179 WD* 16 20 34.6137125184 -59 16 17.819262120   15.03 14.93 15.22   DA3.8 21 0
26 PG 1619+123 WD* 16 22 03.8614974768 +12 13 33.547640376   14.95   15.0   DA2.9 42 0
27 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
28 WG 32 WD* 17 02 56.3376554088 -53 14 36.566115900   13.57 13.48 13.73 13.60 DA3.2 50 0
29 Wolf 665 WD* 17 15 34.8628515360 +33 13 03.893898936   14.43   14.7   DA2.2 76 0
30 Wolf 672 A WD* 17 18 35.1636500684 +01 56 53.203775107       14.63   DA3.7 93 0
31 EGGR 175 WD* 17 45 54.5585495280 -13 17 55.390233660   14.38 14.22     DA3.9 52 0
32 Ross 137 WD* 18 27 13.0871903322 +04 03 46.788559039 13.383 13.981 13.889 13.928 13.958 DA3.5 86 0
33 EGGR 126 WD* 18 29 09.8621169216 -04 29 35.487640068   14.82 14.57 14.74   DA5.4 57 0
34 EGGR 177 WD* 18 30 39.4327226184 -10 36 59.931584028   15.41 15.28 15.82   DA3.6 42 0
35 EGGR 200 WD* 18 42 57.7479820102 -11 08 53.183098481       14.46 14.01 DA4.9 45 0
36 GD 215 WD* 18 43 25.7231549496 +04 20 22.832235600   15.06 14.92 14.2   DA5.6 55 0
37 Lan 18 WD* 18 47 39.0288030792 +01 57 35.449794216 11.68 12.73 12.94 13.1 12.3 DA1.7 81 0
38 BPS CS 22891-0122 WD* 19 18 44.8311223368 -59 46 33.866263128 13.59 14.34 14.39 14.4   DA2.4 32 0
39 GD 219 WD* 19 21 40.4179321464 +14 40 41.404467612   13.07 13.01 13.3   DA3.3 92 0
40 EGGR 134 WD* 19 45 31.7610812568 +16 27 38.769146676   13.96   14.4   DA2.5 62 0
41 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 267 0
42 L 210-114 WD* 20 18 54.6880579032 -57 21 32.761860984 12.56 13.58 13.73 13.9   DA1.8 71 0
43 GD 231 WD* 20 35 13.8112878072 +18 59 21.699648816   15.30 15.34 16.2   DA2.6 55 1
44 BPS CS 30314-0201 WD* 20 38 38.1470977656 -33 26 35.197342620 13.74 14.50 14.25 14.81   DA2.6 18 0
45 EGGR 141 WD* 20 42 34.7517579705 -20 04 35.932296319 11.511 12.315 12.396 12.488 12.602 DA2.5 119 0
46 EGGR 140 WD* 20 44 21.4586818392 -68 05 21.357505752 12.58 13.35 13.30 13.8   DA3.0 74 0
47 GD 232 WD* 21 01 16.4968254144 +18 20 55.295926836   15.01 15.00 15.5   DA2.8 38 0
48 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 125 0
49 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 96 0
50 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
51 EGGR 151 WD* 21 54 06.4513977984 -01 17 09.525582096   14.728 14.515 14.373 13.990 DA5.5 61 0
52 BPS CS 29493-0071 WD* 21 54 53.4012426504 -30 29 18.667362696   14.8 15.05 14.9   DA1.7 45 0
53 V* CD Oct WD* 22 04 20.8589166215 -75 13 26.063295918 14.63 15.22 15.01 14.7   DA5.7 54 0
54 RX J2214.1-4918 WD* 22 14 11.9175658032 -49 19 27.216388524   11.28 11.57 11.7   DA.7 123 0
55 MCT 2251-6326 WD* 22 55 10.5463956027 -63 10 31.037409223   14.063 14.105 14.315   DA2.5 21 0
56 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
57 GD 251 WD* 23 34 20.8686492840 +29 18 37.193293476 14.560 15.563 15.745 15.813 15.981 DA1.8 52 1
58 GD 1192 WD* 23 35 36.6203824200 -16 17 43.655450496   13.47 13.57 13.8   DA3.7 37 0
59 LAWD 94 WD* 23 54 01.0726392457 -33 16 31.078214643   14.6 13.56     DA5.7 63 0

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