2004ApJ...600..404B


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST22:51:40

2004ApJ...600..404B - Astrophys. J., 600, 404-408 (2004/January-1)

On the purity of the ZZ Ceti instability strip: discovery of more pulsating DA white dwarfs on the basis of optical spectroscopy.

BERGERON P., FONTAINE G., BILLERES M., BOUDREAULT S. and GREEN E.M.

Abstract (from CDS):

We report the discovery of two new ZZ Ceti pulsators, LP 133-144 and HE 1258+0123, selected on the basis of model atmosphere fits to optical spectroscopic data. The atmospheric parameters for LP 133-144 (Teff=11,800±200 K and logg=7.87±0.05) and for HE 1258+0123 (Teff=11,410±200 K and logg=8.04±0.05) place them within the empirical boundaries of the ZZ Ceti instability strip. This brings the number of known ZZ Ceti stars to a total of 36, a quarter of which have now been discovered using the spectroscopic approach for estimating their atmospheric parameters. This method has had a 100% success rate so far in predicting the variability of candidate ZZ Ceti stars. We have also analyzed additional spectra of known nonvariable white dwarfs in the vicinity of the ZZ Ceti instability strip. Our study further strengthens the idea that ZZ Ceti stars occupy a pure region in the logg-Teffplane, a region where no nonvariable stars are found. This result supports the thesis that ZZ Ceti pulsators represent a phase through which all DA stars must evolve.

Abstract Copyright:

Journal keyword(s): Stars: Fundamental Parameters - Stars: Individual: Alphanumeric: HE 1258+0123 - stars: individual (LP 133-144) - Stars: Oscillations - Stars: White Dwarfs

Simbad objects: 40

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Number of rows : 40

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 WG 5 WD* 01 06 53.7115659144 -46 08 53.674327800   15.59 15.39 15.66   DA4.4 54 0
2 V* ZZ Cet WD* 01 36 13.6155835488 -11 20 32.631811638   14.328 14.16 14.4   DA4.0 264 0
3 GD 1400 WD* 01 47 21.8246239967 -21 56 51.387203270   15.38 15.15 15.42   DA4.1 71 0
4 V* AQ Tri WD* 02 49 27.5749282105 +32 51 12.433137478     15.8     DA4.2 28 0
5 V* VY Hor WD* 03 43 29.0337379468 -45 49 04.233992041   15.16 14.91 15.28   DA4.3 58 0
6 HL Tau 76 WD* 04 18 56.6380318051 +27 17 48.312463115   15.40       DA4.3 132 0
7 EGGR 34 WD* 04 20 17.2474215789 +36 16 27.266461718   15.79   15.5   DA4.4 65 0
8 V* BR Cam WD* 04 59 27.2436978084 +55 25 21.054241072   15.98   16.1   DA4.3 60 0
9 HS 0507+0434B WD* 05 10 13.5216587720 +04 38 55.134907779   15.52 15.31 15.63   DA2.3 55 0
10 GD 66 WD* 05 20 38.3165475543 +30 48 23.923341864   15.78 15.56     DA4.1 69 1
11 V* AF Pic WD* 05 33 06.7849289666 -56 03 53.376356475 15.42 16.40 16.28     DA4.3 24 0
12 KUV 08368+4026 WD* 08 40 07.7134182521 +40 15 03.726958573   15.84 15.64 15.95   DA4.1 29 0
13 V* VW Lyn WD* 09 01 48.6581784777 +36 07 07.755538143   14.92   14.2   DA4.1 73 0
14 V* RY LMi WD* 09 24 15.2484202569 +35 16 51.400826911   15.72   15.99   DA4 252 0
15 PG 1022+050 WD* 10 24 59.8259661630 +04 46 10.498562889   14.37 14.20 14.2   DA3.5 48 0
16 GD 133 WD* 11 19 12.3989572558 +02 20 33.046829334   14.76 14.57 14.8   DA4.0 78 0
17 V* IZ UMa WD* 11 39 41.4109194194 +42 05 18.427748207     16.56     DA4.1 33 0
18 V* BT Cam WD* 12 01 44.5741979494 +80 04 59.696437232   15.9   16.2   DA4.3 42 0
19 LP 734-74 WD* 12 06 56.2916485636 -13 53 53.042045072   15.72 15.53 15.6   DA4.4 27 0
20 WG 22 WD* 12 38 49.7813250074 -49 48 00.218655097   14.14 13.96     DA4.2 211 0
21 PG 1258+012 HS* 13 00 59.2055058036 +00 57 11.770689604   16.6   16.7   sdOHe 21 0
22 HE 1258+0123 WD* 13 01 10.5152611639 +01 07 39.931497593   16.5 16.26 16.5   DA4.3 33 0
23 Ton 1559 WD* 13 09 57.6765586750 +35 09 47.189084620   15.51   15.2   DA4.4 124 0
24 PG 1349+552 WD* 13 51 20.2511095296 +54 57 42.594177324   15.51       DA4.1 34 0
25 V* DU Dra WD* 13 52 11.0033581771 +65 24 57.125938501   15.7   15.3   DA4.1 64 0
26 EC 14012-1446 WD* 14 03 57.1692363452 -15 01 10.576645001   15.86 15.67 15.89   DA4.1 47 0
27 GD 165 WD* 14 24 39.1494933037 +09 17 14.161331419   14.46 14.32 14.6 14.91 DA4.1 153 0
28 V* MY Aps WD* 14 33 07.6357496582 -81 20 14.126849475   13.49 13.35 13.65   DA4.1 126 0
29 V* KX Dra WD* 15 41 44.8893438012 +64 53 52.977577388   15.7       DA4.2 38 1
30 Ross 808 WD* 16 01 23.1868249632 +36 48 34.290277580   14.53   14.7   DA4.4 103 0
31 V* DN Dra WD* 16 48 25.6321433630 +59 03 22.663406299   12.34 12.17 12.44   DA4.0 200 0
32 BPM 24754 WD* 17 19 01.0244830816 -54 46 16.958192007       15.81 15.48 DA4.5 27 1
33 EGGR 127 WD* 18 57 30.1771893705 +33 57 25.775068391   14.81   14.8   DA4.1 73 0
34 V* PY Vul WD* 19 37 13.7502254298 +27 43 18.736648968   13.14   12.7   DA4.0 119 0
35 V* PT Vul WD* 19 52 27.8765609250 +25 09 29.176771316   15.13   15.1   DA4.2 65 0
36 GD 244 WD* 22 56 46.1531005640 +12 52 50.310130607   16.0   15.6   DA4.2 41 1
37 PG 2303+243 WD* 23 06 17.6911157741 +24 32 07.677770960   15.4   15.2   DA4.3 46 0
38 V* ZZ Psc WD* 23 28 47.6364608228 +05 14 54.234982405   13.17   13.0   DA4.1 448 0
39 EGGR 405 WD* 23 49 53.4642382756 +13 06 12.923130183   15.9   16.3   DA4.4 43 0
40 V* HW Aqr WD* 23 51 22.0903868280 -24 08 17.326639274   15.52   15.1   DA4.2 36 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-22:51:40

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