1998A&A...338..612K

Query : 1998A&A...338..612K

1998A&A...338..612K - Astronomy and Astrophysics, volume 338, 612-622 (1998/10-2)

Search for rotation in white dwarfs.

KOESTER D., DREIZLER S., WEIDEMANN V. and ALLARD N.F.

Abstract (from CDS):

We report high-resolution spectroscopic observations of the NLTE Hα core in 28 DA white dwarfs. From a comparison with theoretically broadened NLTE models projected rotation velocities can be determined. The majority of objects are found to be compatible with zero or very small rotation with typical upper limits for vsini of 15km/s, corresponding to periods of hours or longer. The implications for the loss of angular momentum during the evolution of the progenitors is discussed. Three new magnetic white dwarfs are detected with very small tangential fields in the range of 30 to 50kG. In two more magnetic objects known before we found field strengths significantly larger than the mean longitudinal fields determined from the circular polarization. Very puzzling is the result for three ZZ Ceti stars in the sample, which all seem to have projected rotational velocities between 30 and 45km/s, in conflict with asteroseismological results.

Abstract Copyright: ∼

Journal keyword(s): stars: white dwarfs - stars: rotation - stars: magnetic fields

CDS comments: Table 3 : WD 1137+321 misprint for 1143+321

Simbad objects: 55

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Number of rows : 55
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LAWD 96 WD* 00 02 10.7241976499 -43 09 55.390578662   13.12 13.05     DAP5.8 113 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 87 0
3 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 180 0
4 LAWD 11 WD* 02 08 47.2188825133 +25 14 09.966604316   13.18   13.1   DA2.4 65 0
5 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 265 0
6 LAWD 14 WD* 03 28 48.7986016948 -27 19 00.096684530   14.0 13.56     DA5.4 77 1
7 HZ 4 WD* 03 55 21.9881513952 +09 47 18.135008592 13.917 14.592 14.506 14.58 14.642 DA3.4 203 0
8 G 8-8 WD* 04 04 34.1281892448 +25 08 51.685256904   13.92   14.1   DA3.9 88 0
9 EGGR 29 WD* 04 09 28.9040081904 +17 07 54.395653512 14.66 15.378 15.323 15.408 15.515 DA3.2 120 0
10 * omi02 Eri B WD* 04 15 21.7957181469 -07 39 29.203986789 9.147 9.83 9.53     DA2.9 336 0
11 LAWD 18 WD* 04 23 55.6973490528 +16 21 15.122076192   14.33 14.27 14.79   DA2.5 109 0
12 LAWD 19 WD* 04 28 39.4103640216 +16 58 12.094977036   13.96 14.03 14.51   DA2.0 120 0
13 HZ 7 WD* 04 33 44.9627622456 +12 42 40.357601928   14.15 14.24 14.49   DA2.3 124 0
14 HZ 14 WD* 04 41 01.7398379640 +10 59 40.001283528   13.68 13.86     DA1.8 121 0
15 LAWD 23 WD* 06 47 37.9897150309 +37 30 57.066665144   11.97 12.07 12.26   DA2.3 165 0
16 LP 207-7 WD* 07 29 29.5281053352 +39 10 12.092739492   16.00 15.82     DA3.8 25 0
17 LB 5893 WD* 08 39 36.4894448736 +19 30 43.660631664 16.70 17.57 17.63   18.00 DA2.5 43 0
18 EGGR 61 WD* 08 40 28.0935005160 +19 43 34.488958224   17.6 17.66 17.7   DA 58 0
19 LAWD 32 WD* 09 46 39.0735844152 +43 54 52.233579756   13.39   13.8   DA3.8 103 0
20 EGGR 75 WD* 11 07 42.7744201512 +59 58 29.657444232   13.78   13.7   DA2.7 62 0
21 EGGR 76 WD* 11 07 59.9504280373 -05 09 26.034289695 12.397 13.093 13.057 13.141 13.215 DA3 157 0
22 GD 140 WD* 11 37 05.1041466528 +29 47 58.288741080 11.47 12.42 12.45 12.73 12.714 DA2.2 237 0
23 EGGR 185 WD* 11 45 56.6703793780 +31 49 30.692869763   13.66 13.60 14.0   DA3.1 76 1
24 HZ 43A WD* 13 16 21.8532409720 +29 05 55.411186877   12.52 12.66     DAwk 467 0
25 BD-07 3632 WD* 13 30 13.6370112733 -08 34 29.468140653 11.803 12.398 12.340 12.39 12.436 DA3.5 190 0
26 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 217 0
27 PG 1350-090 WD* 13 53 15.5345099352 -09 16 33.374583634   14.81 14.60     DAP5.3 45 1
28 GD 165 WD* 14 24 39.1495824408 +09 17 14.160753960   14.46 14.32 14.6 14.91 DA4.1 162 0
29 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 139 0
30 GD 185 WD* 15 34 05.9995795608 -02 27 08.259662988   14.03 14.03 13.9   DA2.6 61 0
31 HD 140901B WD* 15 47 30.0209908033 -37 55 08.460010675   13.10 12.80 13.53 12.34 DA4.8 94 0
32 EGGR 118 WD* 16 17 55.2411185208 -15 35 52.154367684 12.086 13.215 13.425 13.558 13.714 DA1.7 97 0
33 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 484 0
34 WG 32 WD* 17 02 56.3376554088 -53 14 36.566115900   13.57 13.48 13.73 13.60 DA3.2 45 0
35 Wolf 672 A WD* 17 18 35.1636500684 +01 56 53.203775107       14.63   DA3.7 85 0
36 EGGR 175 WD* 17 45 54.5585495280 -13 17 55.390233660   14.38 14.22     DA3.9 45 0
37 EGGR 177 WD* 18 30 39.4327226184 -10 36 59.931584028   15.41 15.28 15.82   DA3.6 37 0
38 EGGR 200 WD* 18 42 57.7479820102 -11 08 53.183098481       14.46 14.01 DA4.9 39 0
39 G 142-B2B WD* 19 13 38.6751658464 +13 36 27.362642868 13.52     14.47   DA3.6 52 0
40 GD 219 WD* 19 21 40.4179321464 +14 40 41.404467612   13.07 13.01 13.3   DA3.3 79 0
41 EGGR 134 WD* 19 45 31.7610812568 +16 27 38.769146676   13.96   14.4   DA2.5 57 0
42 LAWD 79 WD* 19 56 29.2263375910 -01 02 32.671070269   13.89 13.56 13.73   DA6.4 138 0
43 LAWD 80 WD* 20 10 17.5214260072 -21 46 45.798289597   14.60 14.58 14.5   DA5.0 53 0
44 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 250 0
45 L 210-114 WD* 20 18 54.6880579032 -57 21 32.761860984 12.56 13.58 13.73 13.9   DA1.8 64 0
46 HD 340611 WD* 20 34 21.8847019255 +25 03 49.750446346 10.687 11.471 11.546 11.648 11.728 DA2.4 312 0
47 EGGR 141 WD* 20 42 34.7517579705 -20 04 35.932296319 11.511 12.315 12.396 12.488 12.602 DA2.5 106 0
48 EGGR 140 WD* 20 44 21.4586818392 -68 05 21.357505752 12.58 13.35 13.30 13.8   DA3.0 64 0
49 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 106 0
50 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 80 0
51 Ross 198 WD* 21 26 25.4551562735 +55 13 32.384210533 14.19 14.88 14.75 15.0 14.8 DA3.6 60 0
52 G 263-3 WD* 21 26 57.6561357825 +73 38 44.668257289 12.15 12.80 12.83 13.30   DA3.1 105 0
53 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 195 0
54 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.17   13.0   DA4.1 485 0
55 Ton S 102 HS* 23 31 49.9502075568 -28 52 52.997322000   13.65 13.86 14.26   sdB 32 0

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