2005A&A...442..629K

Query : 2005A&A...442..629K

2005A&A...442..629K - Astronomy and Astrophysics, volume 442629-634 (2005/11-1)

Discovery of fourteen new ZZ Cetis with SOAR.

KEPLER S.O., CASTANHEIRA B.G., SARAIVA M.F.O., NITTA A., KLEINMAN S.J., MULLALLY F., WINGET D.E. and EISENSTEIN D.J.

Abstract (from CDS):

We report the discovery of fourteen new ZZ Cetis with the 4.1m Southern Astrophysical Research telescope, at Cerro Pachon, in Chile. The candidates were selected from the SDSS (Sloan Digital Sky Survey) DA white dwarf stars with Teff obtained from the optical spectra fit, inside the ZZ Ceti instability strip. Considering these stars are multi-periodic pulsators and the pulsations propagate to the nucleus of the star, they carry information on the structure of the star and evolution of the progenitors. The ZZ Cetis discovered till 2003 are mainly within 100pc from the Sun, and probe only the solar vicinity. The recently discovered ones, and those reported here, may sample a distinct population as they were selected mainly perpendicular to the galactic disk and cover a distance up to ∼400pc.

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Journal keyword(s): stars: white dwarf - stars: variables: general - stars: oscillations

Simbad objects: 15

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Number of rows : 15
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 J082518.9+032928 WD* 08 25 18.8663287080 +03 29 27.850688016           DA 18 0
2 SDSS J084314.05+043131.6 WD* 08 43 14.0620675560 +04 31 31.739349792           DA 20 0
3 EQ J0851+0605 Pu* 08 51 +06.1           ~ 3 0
4 SDSS J091113.00+031127.0 WD* 09 11 13.0035936744 +03 11 27.026979360           DB 16 0
5 EQ J0917+0926 Pu* 09 17 +09.4           ~ 3 0
6 SDSS J110559.96+011749.4 Pu* 11 05 59.9676074328 +01 17 49.498867248   17.9   17.2   ~ 3 0
7 SDSS J121606.32+092345.1 Pu* 12 16 06.3238294680 +09 23 45.159757800   18.9   18.1   ~ 5 0
8 2QZ J121830.6+004216 WD* 12 18 30.6802912680 +00 42 16.095221352   18.0   18.6   DA 20 0
9 USNO-B1.0 0872-00319414 Pu* 12 22 00.2262061704 -02 42 51.540745644   20.4   19.4   ~ 4 0
10 HE 1258+0123 WD* 13 01 10.5155376720 +01 07 39.926449092   16.5 16.26 16.5   DA4.3 47 0
11 GALEX J131007.8-015956 WD* 13 10 07.8741580728 -01 59 55.885426944   17.7   17.8   DA 19 0
12 2QZ J133714.4+010443 WD* 13 37 14.4456558144 +01 04 43.899337056   18.0   18.3   DA4 26 0
13 EQ J1408+0445 Pu* 14 08 +04.7           ~ 3 0
14 GALEX J143249.1+014616 WD* 14 32 49.1040448968 +01 46 15.566117448           DA 21 0
15 GALEX J150207.0-000147 WD* 15 02 07.0175851632 -00 01 47.227926432           DA3.5 23 0

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