2009ApJ...690..560N

Query : 2009ApJ...690..560N

2009ApJ...690..560N - Astrophys. J., 690, 560-565 (2009/January-1)

New pulsating DB white dwarf stars from the Sloan Digital Sky Survey.

NITTA A., KLEINMAN S.J., KRZESINSKI J., KEPLER S.O., METCALFE T.S., MUKADAM A.S., MULLALLY F., NATHER R.E., SULLIVAN D.J., THOMPSON S.E. and WINGET D.E.

Abstract (from CDS):

We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities, a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators' light curves and power spectra.

Abstract Copyright: ∼

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

Simbad objects: 32

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Number of rows : 32
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 PB 5823 WD* 00 15 29.7456358704 +01 05 21.390970776   19       DB 18 0
2 EGGR 409 WD* 01 14 37.6538960064 +10 41 04.757053956   15.27 15.41 15.69   DB2.5 75 0
3 SDSS J031609.12-062556.8 WD* 03 16 09.1236119040 -06 25 56.865710820           DB 9 0
4 SDSS J034153.03-054905.9 WD* 03 41 53.0311364472 -05 49 05.832821604           DB 17 0
5 GALEX J081904.1+354256 WD* 08 19 04.1899934352 +35 42 55.884670236           DB 16 0
6 GALEX J085202.4+213036 WD* 08 52 02.4524306568 +21 30 36.535383108           DB 15 0
7 GALEX J085950.3-000340 WD* 08 59 50.2946744856 -00 03 39.669653088           DB 7 0
8 GALEX J090409.0+012741 WD* 09 04 09.0356566056 +01 27 41.012665128           DB 16 0
9 GALEX J090456.0+525029 WD* 09 04 56.1257331768 +52 50 29.837691600           DB 17 0
10 GALEX J092200.9+000833 WD* 09 22 00.9771635832 +00 08 34.397665728           DB 15 0
11 GALEX J094749.4+015502 WD* 09 47 49.4044707048 +01 55 01.935977016           DB 10 0
12 SDSS J095256.69+015407.7 WD* 09 52 56.6848210104 +01 54 07.726463856           DB 18 0
13 US 1093 WD* 09 54 55.1316491568 +44 03 30.402243144   18.1       DB 16 0
14 GALEX J095649.6+010812 WD* 09 56 49.5410096064 +01 08 12.458966928           DB 7 0
15 V* SW LMi WD* 09 57 49.4086247376 +33 59 23.691674976   17       DB 61 0
16 GALEX J101131.9+050729 WD* 10 11 31.8773729112 +05 07 29.342855640           DB 9 0
17 GALEX J101502.9+464835 WD* 10 15 02.9581148184 +46 48 35.273551572           DB 12 0
18 GALEX J104318.4+415412 WD* 10 43 18.4512012984 +41 54 12.580982604           DB 14 0
19 SDSS J105929.60+554039.2 WD* 10 59 29.6056864176 +55 40 39.261678816           DB 17 0
20 SDSS J122241.28-003614.4 WD* 12 22 41.2720938648 -00 36 14.377981536           DB3 16 0
21 GALEX J122314.2+435009 WD* 12 23 14.2562549592 +43 50 09.190090680           DB 14 0
22 2QZ J125759.0-021314 WD* 12 57 59.0350714248 -02 13 13.369372896           DB 14 0
23 GALEX J130516.5+405640 WD* 13 05 16.5165560232 +40 56 40.789829400           DB 18 0
24 SDSS J130742.43+622956.8 WD* 13 07 42.4428359928 +62 29 56.851563876           DB 15 0
25 GALEX J131148.5+053847 WD* 13 11 48.4954409232 +05 38 47.653112436           DB 16 0
26 GALEX J133215.8+640656 WD* 13 32 15.9422737656 +64 06 56.222538768           DB 16 0
27 2QZ J135610.3-002231 WD* 13 56 10.3142960664 -00 22 30.654647652           DB3 13 0
28 2QZ J140814.6+003838 WD* 14 08 14.6329508928 +00 38 39.021022896   19.27       DB2 17 0
29 GALEX J141258.2+045602 WD* 14 12 58.1751177408 +04 56 02.245773048           DB 18 0
30 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 364 0
31 GALEX J231324.2-001636 WD* 23 13 24.2443590024 -00 16 36.990509412           DB 9 0
32 GALEX J235322.1+002654 WD* 23 53 22.1609404008 +00 26 53.867798484           DB 8 0

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