2013ApJ...779...58R

Query : 2013ApJ...779...58R

2013ApJ...779...58R - Astrophys. J., 779, 58 (2013/December-2)

Asteroseismological study of massive ZZ Ceti stars with fully evolutionary models.

ROMERO A.D., KEPLER S.O., CORSICO A.H., ALTHAUS L.G. and FRAGA L.

Abstract (from CDS):

We present the first asteroseismological study for 42 massive ZZ Ceti stars based on a large set of fully evolutionary carbon-oxygen core DA white dwarf models characterized by a detailed and consistent chemical inner profile for the core and the envelope. Our sample comprises all of the ZZ Ceti stars with spectroscopic stellar masses between 0.72 and 1.05 M☉known to date. The asteroseismological analysis of a set of 42 stars enables study of the ensemble properties of the massive, pulsating white dwarf stars with carbon-oxygen cores, in particular the thickness of the hydrogen envelope and the stellar mass. A significant fraction of stars in our sample have stellar mass that is high enough to crystallize at the effective temperatures of the ZZ Ceti instability strip, which enables us to study the effects of crystallization on the pulsation properties of these stars. Our results show that the phase diagram presented in Horowitz et al. seems to be a good representation of the crystallization process inside white dwarf stars, in agreement with the results from white dwarf luminosity function in globular clusters.

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Journal keyword(s): stars: evolution - stars: ZZ Ceti stars - stars: interiors - stars: oscillations - white dwarfs

Simbad objects: 45

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Number of rows : 45
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 LP 586-51 WD* 01 02 07.2052289536 -00 32 59.563928849   18.31 18.19     DA 32 0
4 L 292-41 WD* 01 06 53.7114590688 -46 08 53.673765720   15.59 15.39 15.66   DA4.4 63 0
5 GALEX J011100.6+001807 WD* 01 11 00.6333109704 +00 18 07.059676176   18.85       DA 31 0
6 EQ J0249-0100 Pu* 02 49 -01.0           ~ 4 0
7 SDSS J030325.22-080834.9 WD* 03 03 25.2245582520 -08 08 34.848742704           DA 24 0
8 SDSS J034939.34+103649.9 WD* 03 49 39.3508055352 +10 36 49.961661156           DA 16 0
9 V* AF Pic WD* 05 33 06.7848149784 -56 03 53.377123392 15.42 16.40 16.28     DA4.3 35 0
10 GALEX J082518.9+032928 WD* 08 25 18.8663287080 +03 29 27.850688016           DA 18 0
11 GALEX J082546.9+411859 WD* 08 25 46.9981396440 +41 18 59.995876104   18.2   18.4   DA 20 0
12 SDSS J084314.05+043131.6 WD* 08 43 14.0620675560 +04 31 31.739349792           DA 20 0
13 GALEX J085507.2+063541 WD* 08 55 07.2955397760 +06 35 41.142016284   16.7   17.5   DA 20 0
14 GALEX J092329.8+012020 WD* 09 23 29.8153028496 +01 20 20.046482016   17.9   18.1   DA 19 0
15 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
16 LSPM J0925+0509 WD* 09 25 11.6311589040 +05 09 32.598340200   15.5   14.9   DA 30 0
17 GALEX J093944.8+560940 WD* 09 39 44.9039678448 +56 09 40.233891924   18.3   18.4   DA 22 0
18 GALEX J094000.2+005206 WD* 09 40 00.2608241352 +00 52 07.167595008           DA 17 0
19 GALEX J110525.7-161328 WD* 11 05 25.6783326408 -16 13 27.952204512           DA 15 0
20 SDSS J120054.54-025107.0 WD* 12 00 54.5490079200 -02 51 07.017004908           DA 17 0
21 SDSS J121606.32+092345.1 Pu* 12 16 06.3238294680 +09 23 45.159757800   18.9   18.1   ~ 5 0
22 2QZ J121830.6+004216 WD* 12 18 30.6802912680 +00 42 16.095221352   18.0   18.6   DA 20 0
23 GALEX J122229.5-024332 WD* 12 22 29.5744699752 -02 43 32.613932568           DA 22 0
24 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
25 GALEX J125710.5+012423 WD* 12 57 10.5041680224 +01 24 22.974150132   18.38 18.69     DA 21 0
26 2QZ J132350.3+010304 WD* 13 23 50.2716690504 +01 03 04.181394384           DA3 23 0
27 2QZ J133714.4+010443 WD* 13 37 14.4456558144 +01 04 43.899337056   18.0   18.3   DA4 26 0
28 V* MY Aps WD* 14 33 07.6366196272 -81 20 14.128475593   13.49 13.35 13.65   DA4.1 152 0
29 GALEX J161218.1+083028 WD* 16 12 18.0751139616 +08 30 28.324213992           DA 19 0
30 SDSS J164115.61+352140.6 WD* 16 41 15.6141187296 +35 21 40.631466996   18.76 19.11     DA 15 0
31 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 364 0
32 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 228 0
33 GALEX J165020.5+301021 WD* 16 50 20.5233302256 +30 10 21.166516020   17.4   17.6   DA 20 0
34 GD 518 WD* 16 59 15.3799290528 +66 10 32.657977416   16.5   17.4   DA4.2 46 0
35 SDSS J171113.02+654158.4 WD* 17 11 12.9964161864 +65 41 58.280220204           DA 29 0
36 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
37 EGGR 127 WD* 18 57 30.1772042847 +33 57 25.775771950   14.81   14.8   DA4.1 83 0
38 SDSS J191643.83+393849.7 WD* 19 16 43.8197701440 +39 38 49.362598824 17.362 17.60 17.72 17.93 17.72 DA 29 0
39 GALEX J212808.4-000749 WD* 21 28 08.4877379040 -00 07 50.909832876   17.67 18.03     DA 21 0
40 GALEX J215905.5+132256 WD* 21 59 05.5320915624 +13 22 55.863479460           DA 19 0
41 GALEX J220830.0+065448 WD* 22 08 30.0266853984 +06 54 48.629233512   17.4   18.0   DA 17 0
42 GALEX J220915.8-091942 WD* 22 09 15.8427360840 -09 19 42.468071016   17.8   18.1   DA 17 0
43 PB 5113 WD* 22 14 58.3726018632 -00 25 11.899431804   18       DA 23 0
44 GALEX J231934.6+515317 WD* 23 19 34.5144779016 +51 53 16.483043940           DA 9 0
45 GALEX J235040.8-005429 WD* 23 50 40.7298561264 -00 54 30.912096492           DA 26 0

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