1994A&A...291L...9K

Query : 1994A&A...291L...9K

1994A&A...291L...9K - Astronomy and Astrophysics, volume 291L9-12 (1994/11-1)

FOS observations of G117-B15A and the blue edge of the ZZ Ceti instability strip.

KOESTER D., ALLARD N.F. and VAUCLAIR G.

Abstract (from CDS):

From an analysis of FOS observations of G117-B15A, one of the hottest members of the ZZ Ceti class, we derive an effective temperature of 12250±125K. Since several other DA near the blue edge of the instability strip must have very similar temperatures according to their UV spectra, it is likely that the blue edge is lower than assumed until now. The spectrum can only be fitted, if we assume a relatively high convective efficiency, corresponding to a mixing-length parameter of about 2.

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - stars: white dwarfs - stars: individual: G117-B15A

Simbad objects: 5

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Number of rows : 5
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 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
2 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
3 GD 165 WD* 14 24 39.1495824408 +09 17 14.160753960   14.46 14.32 14.6 14.91 DA4.1 176 0
4 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 152 0
5 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0

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