CDS

2006A&A...450..331C

Query : 2006A&A...450..331C

2006A&A...450..331C - Astronomy and Astrophysics, volume 450, 331-337 (2006/4-4)

Analysis of IUE spectra of helium-rich white dwarf stars.

CASTANHEIRA B.G., KEPLER S.O., HANDLER G. and KOESTER D.

Abstract (from CDS):

We studied the class of DB white dwarf stars, using re-calibrated UV spectra for thirty four DBs obtained with the IUE satellite. By comparing the observed energy distributions with model atmospheres, we simultaneously determine spectroscopic distances (d), effective temperature (Teff), and surface gravities (logg). Using parallax measurements and previous determinations of Teff and logg from optical spectra, we can study whether the atmospheres of eleven DB stars are consistent with pure He or have a small amount of H contamination. We also report on our observations of seventeen stars with Teff close to the DB instability strip through time series photometry and found them to be non variable within our detection limits.

Abstract Copyright: ∼

Journal keyword(s): stars: white dwarfs - stars: variables: general - stars: oscillations - ultraviolet: stars

Simbad objects: 46

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Number of rows : 46
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 EGGR 508 WD* 00 03 31.6265277744 -16 43 58.413431892   14.68 14.58 14.90   DB4 40 0
2 GD 408 WD* 00 05 06.8206130400 +73 13 09.383025900   14.27   14.4   DB4 74 0
3 Feige 4 WD* 00 20 01.8062210904 +13 52 47.960214096   15.10 15.22     DB3 62 0
4 EGGR 513 WD* 01 03 24.5382532656 -06 32 10.895411436   13.92 13.91     DB3 48 0
5 EGGR 409 WD* 01 14 37.6538960064 +10 41 04.757053956   15.27 15.41 15.69   DB2.5 69 0
6 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.51 15.56     DBZ4 162 0
7 WG 7 WD* 03 09 47.9177537304 -56 23 49.411222764   13.99 14.14 14.42   DB 54 0
8 HE 0417-5357 WD* 04 19 09.9054838776 -53 50 45.306984984 14.15 15.17 15.26     DB 35 0
9 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1071 0
10 WG 8 WD* 06 16 14.2567729529 -59 12 27.405103079   14.00 14.09     DB3+ 61 0
11 Ton 10 WD* 08 43 59.3692454472 +26 02 56.593240584   14.68 14.78     DB3 37 0
12 LAWD 29 WD* 08 47 29.4298183296 -18 59 49.751256732 14.607 15.564 15.682 15.782 15.901 DB3 58 0
13 EGGR 904 WD* 08 56 18.9476777928 +16 11 03.744751560   15.544 15.595 15.885   DB2 53 1
14 PG 0948+013 WD* 09 51 02.2292039424 +01 04 32.565491112   15.89 15.75 16.30 15.77 DB2 39 0
15 PG 0949+094 WD* 09 52 07.8890800776 +09 09 53.402252796   16.01       DB3 15 0
16 GD 303 WD* 10 14 37.0860166680 +56 48 32.692906188   15.5       DBZ4 49 0
17 PG 1026-057 WD* 10 29 02.0470437120 -05 54 27.791348328   16.4 16.94 16.32   DB3 11 0
18 V* DT Leo WD* 11 18 22.6936756944 +15 33 34.535147256   16.90   16.88   DB2 51 0
19 PG 1134+073 WD* 11 36 54.1996134336 +07 03 37.099508292   17.1   17.0   DB3 16 0
20 PG 1149-133 WD* 11 51 50.5965873432 -13 37 15.781935108   16.09       DB2 25 0
21 PG 1311+129 WD* 13 13 51.2698819320 +12 40 09.563476332   16.21 16.26     DBA 30 0
22 PG 1326-037 WD* 13 29 16.3937781024 -03 58 51.729824064     15.7     DB2 24 0
23 PG 1332+163 WD* 13 34 39.6364682160 +15 59 48.572063952   15.98       DBA 17 0
24 GD 325 WD* 13 36 01.8224904648 +48 28 46.249072104   13.91 13.98 14.42   DB4 67 0
25 PG 1336+124 WD* 13 39 13.5352591080 +12 08 31.227183960   14.41   14.6   DB3+ 33 0
26 V* EM UMa WD* 13 53 09.9687043752 +48 40 21.171407268   16.5   17.0   DB2 100 0
27 PG 1411+219 WD* 14 13 29.8346506368 +21 37 39.883898712   14.4 14.38 14.58   DB4 22 0
28 PG 1415+234 WD* 14 17 55.3673617656 +23 11 36.712935564   16.5 16.8     DB3 20 0
29 G 200-39 WD* 14 27 36.1747969268 +53 48 28.004467199   14.86 14.99 15.35   DBAZ4 91 0
30 PG 1444-096 WD* 14 47 36.9901901064 -09 50 06.668834316   14.94 14.92 15.55   DB3 19 0
31 PG 1445+153 WD* 14 48 14.3731494768 +15 04 49.731182436   15.55 15.6     DB 33 0
32 EGGR 393 WD* 14 56 31.8399389096 +81 56 52.708407887   15.0   14.8   DB4 39 0
33 L 151-81 ** 14 58 11.714 -63 17 33.39   15.8   16.2   DB3+DA4 17 0
34 2MASS J14581310-6317340 NIR 14 58 13.1085140832 -63 17 34.032741504   19.8 18.2     ~ 1 0
35 V* CW Boo WD* 14 58 32.6381816376 +10 08 18.108688128   15.89       DBA 56 0
36 GD 190 WD* 15 44 19.4543884752 +18 06 43.775072424 13.537 14.556 14.677 14.767 14.849 DB2 86 0
37 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 343 0
38 PG 1654+160 WD* 16 56 57.4672879608 +15 56 27.791267532           DB2 53 0
39 L 7-44 WD* 17 32 54.9438114864 -87 10 02.554841424   14.64 14.70 15.04   DB 21 0
40 GD 378 WD* 18 23 37.0114872120 +41 04 02.107466472 13.246 14.208 14.288 14.324 14.379 DBAZ4 71 0
41 L 1573-31 WD* 19 42 13.0000736808 +37 31 56.596843236   14.42   14.5   DB1 49 1
42 L 279-25 WD* 20 38 16.8483476640 -53 04 25.343852520 13.32 14.27 14.36     DB 33 0
43 LAWD 87 WD* 21 32 16.2327040616 +00 15 14.399267982 13.717 14.634 14.674 14.675 14.676 DB4 180 1
44 LAWD 92 WD* 22 27 20.9516950200 -34 11 14.067803616   14.5   14.81 14.50 DB3 38 0
45 EGGR 907 WD* 22 36 41.9752381392 +06 40 17.431231692   16.06 16.17 16.14   DB2 20 0
46 PG 2354+159 WD* 23 56 34.7462697000 +16 15 40.257339876   15.78   16.15   DBZ 24 0

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2023.06.09-23:58:31

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