1997A&A...325.1055V

Query : 1997A&A...325.1055V

1997A&A...325.1055V - Astronomy and Astrophysics, volume 3251055-1062 (1997/9-3)

White dwarfs observed by the HIPPARCOS satellite.

VAUCLAIR G., SCHMIDT H., KOESTER D. and ALLARD N.

Abstract (from CDS):

The HIPPARCOS satellite has measured trigonometric parallaxes for 20 white dwarfs. With the exception of one each of the spectral types DZ, DC, DB, DQ, the majority are of spectral type DA. We compare the parallaxes with the most recent ground-based determinations. From a spectroscopic analysis of new optical observations we determine atmospheric parameters Teff and logg. From the angular diameters and the parallaxes radii are obtained, and masses are calculated from these radii and the spectroscopic logg. These data are used to test the theoretical mass-radius relation. On the other hand, assuming this relation, including finite temperature evolutionary effects, we can derive radii and masses from the effective temperatures and parallaxes. From these we calculate surface gravities, which can be compared to the results of the spectroscopic analysis.

Abstract Copyright: ∼

Journal keyword(s): stars: distances - stars: fundamental parameters - stars: white dwarfs

Simbad objects: 19

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Number of rows : 19
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 279 WD* 01 52 02.9620032216 +47 00 06.651152568 11.906 12.519 12.463 12.519 12.586 DA3.6 109 0
3 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
4 V* FS Cet CV* 02 35 07.5939240480 +03 43 56.816311296 11.027 12.209 12.412 12.325 11.968 DA1+dM 379 0
5 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 299 0
6 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
7 LAWD 23 WD* 06 47 37.9897150309 +37 30 57.066665144   11.97 12.07 12.26   DA2.3 182 0
8 GD 294 HS* 07 17 36.2651664120 +58 24 20.505079188   12.06 12.02 12.30   sdB 49 0
9 GD 140 WD* 11 37 05.1041466528 +29 47 58.288741080 11.47 12.42 12.45 12.73 12.714 DA2.2 257 0
10 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
11 HZ 43A WD* 13 16 21.8532409720 +29 05 55.411186877   12.52 12.66     DAwk 477 0
12 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
13 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
14 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
15 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0
16 HD 340611 WD* 20 34 21.8847019255 +25 03 49.750446346 10.687 11.471 11.546 11.648 11.728 DA2.4 329 0
17 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
18 EGGR 378 WD* 21 18 56.2636115928 +54 12 41.243943888 11.76     12.9   DA3.4 111 1
19 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

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