2002A&A...389..896K

Query : 2002A&A...389..896K

2002A&A...389..896K - Astronomy and Astrophysics, volume 389896-903 (2002/7-3)

The ZZ Ceti red edge.

KANAAN A., KEPLER S.O. and WINGET D.E.

Abstract (from CDS):

With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11000K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11000K have been carried out using time-series photoelectric photometry, not differential photometry, insensitive for small amplitude periodicities of 15 min and longer. In our survey we constantly monitor the sky brightness as well as one or more comparison stars through the same color filter, reducing the adverse effects of differential extinction and sky fluctuations, obtaining true differential photometry.

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - stars: white dwarfs

Simbad objects: 19

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Number of rows : 19
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 511 WD* 00 35 17.5123470013 -17 18 51.571586248   15.17 14.9 14.7   DA5.1 54 1
2 LAWD 5 WD* 00 35 35.8382124422 +01 53 08.626899670   15.76 15.52 15.6   DA4.6 69 0
3 EGGR 7 WD* 01 03 49.9225512196 +05 04 30.568726390   14.295 13.972 14.030   DA5.9 102 0
4 V* ZZ Cet WD* 01 36 13.6153974672 -11 20 32.632874601   14.328 14.16 14.4   DA4.0 307 0
5 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 191 0
6 EGGR 58 WD* 08 20 01.3406920039 +38 34 35.521476253   16.94   16.4   DA6.5 64 0
7 EGGR 64 WD* 09 16 40.7559432984 +43 59 41.590579092   15.56   15.3   DA5.8 73 0
8 EGGR 69 WD* 09 57 48.3483199086 +24 32 55.543566200   15.34 15.09 14.4   DA5.8 72 0
9 PG 1119+386 WD* 11 22 38.1317397504 +38 18 26.457755904   16.03       DA3.0 31 0
10 LAWD 38 WD* 11 50 20.1723452944 +25 18 32.765299925   15.78   15.4   DA5 66 0
11 EGGR 92 WD* 12 47 14.7133704150 +14 42 30.875986658   16.08   15.9   DA4.6 66 0
12 GD 176 WD* 15 10 29.0412183168 -10 45 19.415579328   15.65 15.42 15.2   DA4.9 39 0
13 GD 348 WD* 15 37 44.4366919464 +65 01 48.746398008   14.83   14.6   DA5.1 45 0
14 GD 189 WD* 15 42 14.2129199328 -03 41 31.297062912   15.45 15.20 15.0   DA5.0 40 0
15 EGGR 197 WD* 16 57 09.8599362431 +21 26 48.659961060   14.32   14.1   DA5.4 97 0
16 EGGR 200 WD* 18 42 57.7479820102 -11 08 53.183098481       14.46 14.01 DA4.9 45 0
17 EGGR 128 WD* 18 59 49.2015115920 +11 58 40.273201272   15.72   15.3   DA5.0 41 0
18 EGGR 582 WD* 21 38 46.1923801224 +23 09 21.491234532   15.39   14.6   DA4.9 58 0
19 EGGR 155 WD* 22 49 05.5507896558 +22 36 31.991540832   14.55   13.8   DA4.7 111 0

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