2013MNRAS.430...50C

Query : 2013MNRAS.430...50C

2013MNRAS.430...50C - Mon. Not. R. Astron. Soc., 430, 50-59 (2013/March-3)

Discovery of five new massive pulsating white dwarf stars.

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

Abstract (from CDS):

Using the SOuthern Astrophysical Research telescope (SOAR) Optical Imager at the SOAR 4.1 m telescope, we report on the discovery of five new massive pulsating white dwarf stars. Our results represent an increase of about 20 per cent in the number of massive pulsators. We have detected both short and long periods, low and high amplitude pulsation modes, covering the whole range of the ZZ Ceti instability strip.

In this paper, we present a first seismological study of the new massive pulsators based on the few frequencies detected. Our analysis indicates that these stars have masses higher than average, in agreement with the spectroscopic determinations. In addition, we study for the first time the ensemble properties of the pulsating white dwarf stars with masses above 0.8 M☉. We found a bimodal distribution of the main pulsation period with the effective temperature for the massive DAVs, which indicates mode selection mechanisms.


Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): white dwarfs

CDS comments: In table 4 : WD J0855+0653 is a misprint for WD J0855+0635, WD J0940+0050 is a misprint for WD J0940+0052.

Simbad objects: 26

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Number of rows : 26
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 5668 WD* 00 00 06.7573727688 -00 46 53.875361208   18.3   18.5   DA 19 0
2 GALEX J004855.2+152149 WD* 00 48 55.1704598016 +15 21 48.710910384   17.8   18.2   DA 20 0
3 GALEX J011100.6+001807 WD* 01 11 00.6333109704 +00 18 07.059676176   18.85       DA 31 0
4 SDSS J030325.22-080834.9 WD* 03 03 25.2245582520 -08 08 34.848742704           DA 24 0
5 SDSS J034939.34+103649.9 WD* 03 49 39.3508055352 +10 36 49.961661156           DA 16 0
6 GALEX J082546.9+411859 WD* 08 25 46.9981396440 +41 18 59.995876104   18.2   18.4   DA 20 0
7 GALEX J085507.2+063541 WD* 08 55 07.2955397760 +06 35 41.142016284   16.7   17.5   DA 20 0
8 LSPM J0925+0509 WD* 09 25 11.6311589040 +05 09 32.598340200   15.5   14.9   DA 30 0
9 GALEX J094000.2+005206 WD* 09 40 00.2608241352 +00 52 07.167595008           DA 17 0
10 SDSS J120054.54-025107.0 WD* 12 00 54.5490079200 -02 51 07.017004908           DA 17 0
11 SDSS J121606.32+092345.1 Pu* 12 16 06.3238294680 +09 23 45.159757800   18.9   18.1   ~ 5 0
12 USNO-B1.0 0872-00319414 Pu* 12 22 00.2262061704 -02 42 51.540745644   20.4   19.4   ~ 4 0
13 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
14 GALEX J125710.5+012423 WD* 12 57 10.5041680224 +01 24 22.974150132   18.38 18.69     DA 21 0
15 2QZ J132350.3+010304 WD* 13 23 50.2716690504 +01 03 04.181394384           DA3 23 0
16 2QZ J133714.4+010443 WD* 13 37 14.4456558144 +01 04 43.899337056   18.0   18.3   DA4 26 0
17 GALEX J161218.1+083028 WD* 16 12 18.0751139616 +08 30 28.324213992           DA 19 0
18 SDSS J164115.61+352140.6 WD* 16 41 15.6141187296 +35 21 40.631466996   18.76 19.11     DA 15 0
19 GALEX J165020.5+301021 WD* 16 50 20.5233302256 +30 10 21.166516020   17.4   17.6   DA 20 0
20 SDSS J171113.02+654158.4 WD* 17 11 12.9964161864 +65 41 58.280220204           DA 29 0
21 GALEX J212808.4-000749 WD* 21 28 08.4877379040 -00 07 50.909832876   17.67 18.03     DA 21 0
22 GALEX J215905.5+132256 WD* 21 59 05.5320915624 +13 22 55.863479460           DA 19 0
23 GALEX J220830.0+065448 WD* 22 08 30.0266853984 +06 54 48.629233512   17.4   18.0   DA 17 0
24 GALEX J220915.8-091942 WD* 22 09 15.8427360840 -09 19 42.468071016   17.8   18.1   DA 17 0
25 PB 5113 WD* 22 14 58.3726018632 -00 25 11.899431804   18       DA 23 0
26 GALEX J235040.8-005429 WD* 23 50 40.7298561264 -00 54 30.912096492           DA 26 0

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