2002ApJ...580..429M

Query : 2002ApJ...580..429M

2002ApJ...580..429M - Astrophys. J., 580, 429-433 (2002/November-3)

A new ZZ Ceti white dwarf pulsator: G30-20.

MUKADAM A.S., KEPLER S.O., WINGET D.E. and BERGERON P.

Abstract (from CDS):

We report the discovery of a new hydrogen atmosphere variable white dwarf (DAV; ZZ Ceti), G30-20, a high-amplitude, long-period pulsator. The Fourier transform of its light curve shows power around 1050-1125 s. We suspect the existence of multiple periodicities in this region, probably corresponding to different radial order (k) modes, but our observations are not long enough to resolve them. This discovery increases the number of known DAVs to 32. Our best fit to its optical spectrum gives Teff=11,070±180K and logg=7.95±0.06. This implies that G30-20 is the coolest known DAV.

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Journal keyword(s): Stars: Individual: Alphanumeric: G30-20 - Stars: Individual: Alphanumeric: WD 2347+128 - Stars: Oscillations - Stars: Variables: Other - Stars: White Dwarfs

Simbad objects: 10

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Number of rows : 10
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 V* VY Hor WD* 03 43 29.0336408736 -45 49 04.233811368   15.16 14.91 15.28   DA4.3 69 0
2 HL Tau 76 WD* 04 18 56.6378191680 +27 17 48.314513652   15.40       DA4.3 154 0
3 EGGR 34 WD* 04 20 17.2470258432 +36 16 27.266860200   15.79   15.5   DA4.4 76 0
4 GD 66 WD* 05 20 38.3165748936 +30 48 23.922603900   15.78 15.56     DA4.1 81 1
5 Ton 1559 WD* 13 09 57.6766028952 +35 09 47.187935136   15.51   15.2   DA4.4 138 0
6 V* DU Dra WD* 13 52 11.0036780664 +65 24 57.126049128   15.7   15.3   DA4.1 75 0
7 GD 165 WD* 14 24 39.1495824408 +09 17 14.160753960   14.46 14.32 14.6 14.91 DA4.1 176 0
8 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0
9 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
10 EGGR 405 WD* 23 49 53.4642375816 +13 06 12.922792560   15.9   16.3   DA4.4 55 0

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