2004ApJ...600..404B

Query : 2004ApJ...600..404B

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

goto Full paper

goto View the references in ADS

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 - 2026 		#notes
1 L 292-41 WD* 01 06 53.7114590688 -46 08 53.673765720   15.59 15.39 15.66   DA4.4 63 0
2 V* ZZ Cet WD* 01 36 13.6153974672 -11 20 32.632874601   14.328 14.16 14.4   DA4.0 307 0
3 GD 1400 WD* 01 47 21.8246176800 -21 56 51.386849088   15.38 15.15 15.42   DA4.1 101 0
4 V* AQ Tri WD* 02 49 27.5745572088 +32 51 12.431334636     15.8     DA4.2 39 0
5 V* VY Hor WD* 03 43 29.0336408736 -45 49 04.233811368   15.16 14.91 15.28   DA4.3 69 0
6 HL Tau 76 WD* 04 18 56.6378191680 +27 17 48.314513652   15.40       DA4.3 154 0
7 EGGR 34 WD* 04 20 17.2470258432 +36 16 27.266860200   15.79   15.5   DA4.4 76 0
8 V* BR Cam WD* 04 59 27.2435598163 +55 25 21.057303220   15.98   16.1   DA4.3 70 0
9 HS 0507+0434B WD* 05 10 13.5215260416 +04 38 55.135549140   15.52 15.31 15.63   DA2.3 77 0
10 GD 66 WD* 05 20 38.3165748936 +30 48 23.922603900   15.78 15.56     DA4.1 81 1
11 V* AF Pic WD* 05 33 06.7848149784 -56 03 53.377123392 15.42 16.40 16.28     DA4.3 35 0
12 KUV 08368+4026 WD* 08 40 07.7135286864 +40 15 03.726378396   15.84 15.64 15.95   DA4.1 41 0
13 V* VW Lyn WD* 09 01 48.6581163552 +36 07 07.757288184   14.92   14.2   DA4.1 86 0
14 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
15 PG 1022+050 WD* 10 24 59.8281525960 +04 46 10.445657952   14.37 14.20 14.2   DA3.5 60 0
16 GD 133 WD* 11 19 12.3988618680 +02 20 33.045927216   14.734 14.617 14.855   DA4.0 107 0
17 V* IZ UMa WD* 11 39 41.4106847280 +42 05 18.429389196     16.56     DA4.1 44 0
18 V* BT Cam WD* 12 01 44.5758064464 +80 04 59.697402168   15.9   16.2   DA4.3 50 0
19 LP 734-74 WD* 12 06 56.2914581818 -13 53 53.037650505   15.72 15.53 15.6   DA4.4 37 0
20 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
21 PG 1258+012 HS* 13 00 59.2051279416 +00 57 11.766735576   16.6   16.7   sdOHe 31 0
22 HE 1258+0123 WD* 13 01 10.5155376720 +01 07 39.926449092   16.5 16.26 16.5   DA4.3 47 0
23 Ton 1559 WD* 13 09 57.6766028952 +35 09 47.187935136   15.51   15.2   DA4.4 138 0
24 PG 1349+552 WD* 13 51 20.2509674304 +54 57 42.595932708   15.51       DA4.1 49 0
25 V* DU Dra WD* 13 52 11.0036780664 +65 24 57.126049128   15.7   15.3   DA4.1 75 0
26 EC 14012-1446 WD* 14 03 57.1692959280 -15 01 10.577565696   15.86 15.67 15.89   DA4.1 63 0
27 GD 165 WD* 14 24 39.1495824408 +09 17 14.160753960   14.46 14.32 14.6 14.91 DA4.1 176 0
28 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 152 0
29 V* KX Dra WD* 15 41 44.8895982744 +64 53 52.977685920   15.562 15.523 15.658   DA4.2 60 1
30 Ross 808 WD* 16 01 23.1868739817 +36 48 34.288643534   14.53   14.7   DA4.4 117 0
31 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0
32 BPM 24754 WD* 17 19 01.0244255304 -54 46 16.960940940       15.81 15.48 DA4.5 36 1
33 EGGR 127 WD* 18 57 30.1772042847 +33 57 25.775771950   14.81   14.8   DA4.1 83 0
34 V* PY Vul WD* 19 37 13.7502269447 +27 43 18.733503670   13.14   12.7   DA4.0 138 0
35 V* PT Vul WD* 19 52 27.8765406336 +25 09 29.175649632   15.13   15.1   DA4.2 74 0
36 GD 244 WD* 22 56 46.1531007720 +12 52 50.311741512   16.0   15.6   DA4.2 55 1
37 PG 2303+243 WD* 23 06 17.6909597616 +24 32 07.677555468   15.4   15.2   DA4.3 60 0
38 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
39 EGGR 405 WD* 23 49 53.4642375816 +13 06 12.922792560   15.9   16.3   DA4.4 55 0
40 V* HW Aqr WD* 23 51 22.0904044560 -24 08 17.326740768   15.52   15.1   DA4.2 48 0

To bookmark this query, right click on this link: simbad:objects in 2004ApJ...600..404B and select 'bookmark this link' or equivalent in the popup menu