2000BaltA...9..125K

Query : 2000BaltA...9..125K

2000BaltA...9..125K - Baltic Astronomy, 9, 125-132 (2000/January-0)

The ML1/alpha = 2 instability strip of ZZ Ceti stars.

KEPLER S.O., DA COSTA A.F.M., GIOVANNINI O. and KOESTER D.

Abstract (from CDS):

We are obtaining high signal-to-noise optical spectra and time-series photometry of all known DA white dwarfs around the ZZ Ceti instability strip to derive their atmospheric parameters and masses. In this work we report the fundamental parameters for 13 DA stars using ML1/α=2 model atmospheres and analyze the ZZ Ceti instability strip with a sample of 92 DA white dwarfs. This sample has an average mass of 0.59 ±0.02 M☉ with a dispersion of 0.15 M☉. Our study shows that the limits of the ZZ Ceti instability strip depend on the effective temperature and mass of the star.

Abstract Copyright: ∼

Journal keyword(s): stars: fundamental parameters, white dwarfs, variables

CDS comments: Id. EC incomplete format, not in SIMBAD

Simbad objects: 28

goto View the references in ADS

Number of rows : 28
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 EGGR 559 WD* 00 12 32.1555153048 -05 33 31.868162064           DA4.8 18 0
2 G 158-39 ** 00 12 32.17872 -05 33 32.0616   15.9   15.4   ~ 11 0
3 G 269-93 WD* 01 05 53.5364544744 -27 36 56.450601216   15.43 15.42 15.49   DA3.6 35 0
4 L 292-41 WD* 01 06 53.7114590688 -46 08 53.673765720   15.59 15.39 15.66   DA4.4 63 0
5 GD 685 WD* 01 09 33.1581074544 -19 01 17.559336144   16.252 16.166 16.1   DA3.3 41 0
6 LB 3209 WD* 01 26 34.7876649576 -65 46 30.065798964   11.79 11.54     DA4 16 0
7 V* ZZ Cet WD* 01 36 13.6153974672 -11 20 32.632874601   14.328 14.16 14.4   DA4.0 307 0
8 GD 1394 WD* 01 44 36.2779880952 -30 11 22.369890732   15.5       DA3.5 21 0
9 GD 47 WD* 03 41 54.4340780856 -03 22 39.460102392   15.35 15.20 15.1   DA3.9 46 0
10 V* VY Hor WD* 03 43 29.0336408736 -45 49 04.233811368   15.16 14.91 15.28   DA4.3 69 0
11 HZ 4 WD* 03 55 21.9881513952 +09 47 18.135008592 13.917 14.592 14.506 14.58 14.642 DA3.4 220 0
12 HZ 10 WD* 04 10 10.3228142856 +18 02 23.805371472   14.29 14.14 14.60   DA3.5 72 0
13 HL Tau 76 WD* 04 18 56.6378191680 +27 17 48.314513652   15.40       DA4.3 154 0
14 V* AF Pic WD* 05 33 06.7848149784 -56 03 53.377123392 15.42 16.40 16.28     DA4.3 35 0
15 EC 06220-8010 WD* 06 18 13.0786558128 -80 11 55.219502885 14.35 14.96 14.74   14.87 DA 17 0
16 L 32-11 WD* 06 22 52.7423643288 -75 40 41.706450840   15.64 15.52     DA 20 0
17 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
18 L 64-27 WD* 09 55 22.8860821488 -71 18 08.368345152   13.60 13.48 13.71 13.64 DA3.4 38 0
19 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
20 GD 165 WD* 14 24 39.1495824408 +09 17 14.160753960   14.46 14.32 14.6 14.91 DA4.1 176 0
21 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 152 0
22 Ross 808 WD* 16 01 23.1868739817 +36 48 34.288643534   14.53   14.7   DA4.4 117 0
23 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0
24 BPM 24754 WD* 17 19 01.0244255304 -54 46 16.960940940       15.81 15.48 DA4.5 36 1
25 V* PT Vul WD* 19 52 27.8765406336 +25 09 29.175649632   15.13   15.1   DA4.2 74 0
26 WD 2302-773 WD* 23 05 44.9 -77 01 48           DA3.7 3 0
27 PG 2303+243 WD* 23 06 17.6909597616 +24 32 07.677555468   15.4   15.2   DA4.3 60 0
28 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0

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