2010MNRAS.405.2561C

Query : 2010MNRAS.405.2561C

2010MNRAS.405.2561C - Mon. Not. R. Astron. Soc., 405, 2561-2569 (2010/July-2)

New developments of the ZZ Ceti instability strip: the discovery of 11 new variables.

CASTANHEIRA B.G., KEPLER S.O., KLEINMAN S.J., NITTA A. and FRAGA L.

Abstract (from CDS):

Using the The SOuthern Astrophysical Research (SOAR) 4.1-m telescope, we report on the discovery of low amplitude pulsations for three stars previously reported as not-observed-to-vary (NOV) by Mukadam et al. and Mullally et al., which are inside the ZZ Ceti instability strip. With the two pulsators discovered by Castanheira et al., we have now found variability in a total of five stars previously reported as NOVs. We also report the variability of eight new pulsating stars, not previously observed, bringing the total number of known ZZ Ceti stars to 148. In addition, we lowered the detection limit for 10 NOVs located near the edges of the ZZ Ceti instability strip. Our results are consistent with a pure mass-dependent ZZ Ceti instability strip.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: variables: general - white dwarfs

Simbad objects: 23

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Number of rows : 23
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 GALEX J003719.1+003138 WD* 00 37 19.1230456440 +00 31 39.229788864   17.2   17.4   DA5 21 0
2 GALEX J004345.7+005549 WD* 00 43 45.8052250344 +00 55 50.122644204   18.0   18.7   DA 17 0
3 GALEX J005047.6-002316 WD* 00 50 47.6136522696 -00 23 16.896251616   18.0   18.4   DA 24 0
4 GD 842 WD* 01 22 34.6824285216 +00 30 26.030871324   17       DA 21 0
5 GALEX J012950.4-101841 WD* 01 29 50.4386457912 -10 18 42.055651620           DA 13 0
6 GD 18 WD* 01 52 59.1949721472 +01 00 18.095587740   17.0   18.6   DA 34 0
7 LB 181 WD* 02 57 09.0024386328 +00 46 27.946016688   17.8 17.85     DA 30 0
8 GALEX J030153.7+054020 WD* 03 01 53.7937958208 +05 40 20.031672720           DA 14 0
9 KUV 03205-0005 WD* 03 23 02.8512206040 +00 05 59.658202104     16.97     DA3.7 26 0
10 GALEX J033648.3-000633 WD* 03 36 48.3368718600 -00 06 34.305853932   17.4   18.1   DA 19 0
11 SDSS J034504.20-003613.5 WD* 03 45 04.2049369440 -00 36 13.565498616           DA 17 0
12 GALEX J082239.4+082437 WD* 08 22 39.4365976512 +08 24 36.948491640           DA 16 0
13 LSPM J0925+0509 WD* 09 25 11.6311589040 +05 09 32.598340200   15.5   14.9   DA 30 0
14 GALEX J095937.0+023828 WD* 09 59 36.9595371528 +02 38 28.522683528   18.311 18.461     DA 15 0
15 GALEX J110525.7-161328 WD* 11 05 25.6783326408 -16 13 27.952204512           DA 15 0
16 SDSS J113604.01-013658.2 WD* 11 36 04.0123445616 -01 36 58.140414180           DA 22 0
17 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
18 SDSS J133831.75-002328.0 WD* 13 38 31.7495135568 -00 23 27.996154224           DA4 25 0
19 GALEX J143249.1+014616 WD* 14 32 49.1040448968 +01 46 15.566117448           DA 21 0
20 GALEX J214723.7-001358 WD* 21 47 23.7281829696 -00 13 58.451492532   18.69 19.05     DA 12 0
21 GALEX J220915.8-091942 WD* 22 09 15.8427360840 -09 19 42.468071016   17.8   18.1   DA 17 0
22 PHL 5834 WD* 23 26 59.2301409840 -00 23 47.957598816   17.8       DA 27 0
23 PB 5503 WD* 23 41 41.6480397360 -01 09 17.189246916   17.6   18.3   DA 19 0

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