2005ApJ...631.1100G


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.09CEST07:14:38

2005ApJ...631.1100G - Astrophys. J., 631, 1100-1112 (2005/October-1)

Toward an empirical determination of the ZZ Ceti instability strip.

GIANNINAS A., BERGERON P. and FONTAINE G.

Abstract (from CDS):

We present atmospheric parameters for a large sample of DA white dwarfs that are known to be photometrically constant. For each star, we determine the effective temperature and surface gravity by comparing high signal-to-noise ratio optical spectra to the predictions of detailed model atmosphere calculations. We also report the successful prediction and detection of photometric variability in G232-38 based on similar Teffand logg determinations. The atmospheric parameters derived for this sample of constant stars, as well as those for the known sample of bright ZZ Ceti stars (now boosted to a total of 39), have been obtained in a highly homogeneous way. We combine them to study the empirical red and blue edges, as well as the purity of the ZZ Ceti instability strip. We find that the red edge is rather well constrained, whereas there exists a rather large range of possibilities for the slope of the blue edge. Furthermore, the ZZ Ceti instability strip that results from our analysis contains no nonvariable white dwarfs. Our sample of constant stars is part of a much broader spectroscopic survey of bright (V<17) DA white dwarfs, which we have recently undertaken. We also present here some preliminary results of this survey. Finally, we revisit the analysis by Mukadam et al. of the variable and nonvariable DA stars uncovered as part of the Sloan Digital Sky Survey. Their erroneous conclusion of an instability strip containing several nonvariable stars is traced back to the low signal-to-noise ratio spectroscopic observations used in that survey.

Abstract Copyright:

Journal keyword(s): stars: individual (G232-38) - Stars: Oscillations - Stars: White Dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/631/1100): table1.dat table2.dat refs.dat>

Simbad objects: 133

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Number of rows : 133

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 EGGR 509 WD* 00 07 34.8219598592 -16 05 31.611923339   16.0 16.29 16.0   DA3.4 19 0
2 EGGR 381 WD* 00 12 14.7450558223 +50 25 20.735643555   14.6   14.2   DA7.6 85 0
3 Wolf 1 WD* 00 13 39.1507527874 +00 19 24.583485677   15.55   15.4   DA5.2 67 0
4 BD+43 100B WD* 00 33 02.8476503225 +44 44 13.144561994   16.89   16.8   DA4.8 41 0
5 EGGR 511 WD* 00 35 17.5121261837 -17 18 51.573214772   15.17 14.9 14.7   DA5.1 42 1
6 LAWD 5 WD* 00 35 35.8380879443 +01 53 08.622736703   15.76 15.52 15.6   DA4.6 56 0
7 EGGR 561 WD* 00 40 22.8841523289 -00 21 30.066950162   15.29 15.1     DA3.2 33 0
8 EGGR 7 WD* 01 03 49.9233050217 +05 04 30.567630963   14.24   13.7   DA5.9 88 0
9 G 269-93 WD* 01 05 53.5363540214 -27 36 56.453682898   15.43 15.42 15.49   DA3.6 25 0
10 GD 275 WD* 01 18 54.1936244799 +52 27 13.719327410 15.33 15.88 15.68 15.654 15.710 DA4.6 23 0
11 V* ZZ Cet WD* 01 36 13.6155835488 -11 20 32.631811638   14.328 14.16 14.4   DA4.0 264 0
12 LAWD 10 WD* 01 37 59.3936600367 -04 59 44.670036387   13.20 12.83 12.8   DA+D1 169 0
13 Wolf 82 WD* 01 46 41.3126396368 +21 54 48.381923366   15.30   15.1   DA5.4 36 0
14 GD 279 WD* 01 52 02.9616166419 +47 00 06.655092203 11.906 12.519 12.463 12.519 12.586 DA3.6 86 0
15 EGGR 311 WD* 01 54 13.8875357295 +02 01 24.139587704   15.16   14.4   DA3.9 38 0
16 EGGR 168 WD* 02 11 20.8420180006 +39 55 21.515685472   14.80 14.50 14.4   DAZ6.9 101 0
17 GD 25 WD* 02 16 16.3517118401 +39 51 25.412429195   14.77   14.6   DA5.4 51 0
18 GD 31 WD* 02 34 07.7271286697 -05 11 39.329735337   14.45 14.24 14.3   DA2.9 59 0
19 KUV 02386+3322 WD* 02 41 36.4977019722 +33 34 44.884668967   16.31 15.9 15.90   DA3.6 9 0
20 PG 0243+155 WD* 02 46 24.0723876845 +15 45 02.286583706   15.49   16.6   DA2.9 15 0
21 LAWD 13 WD* 02 56 17.2206056121 -70 22 10.850183058 13.72 14.25 14.07 14.03 14.00 DA4.7 53 1
22 GD 426 WD* 03 06 16.6928623498 +62 22 22.446487291   15.17 14.95     DA4.5 24 0
23 V* CC Cet ** 03 10 54.9905206191 +09 49 25.677202027           DA2+dM 50 0
24 LAWD 14 WD* 03 28 48.7985358267 -27 19 00.094462182   14.0 13.56     DA5.4 69 1
25 EGGR 23 WD* 03 35 17.3296125846 +32 12 02.377264802   15.62   15.8   DA4.8 28 0
26 GD 47 WD* 03 41 54.4340332310 -03 22 39.461916184   15.35 15.20 15.1   DA3.9 36 0
27 EGGR 567 WD* 03 43 06.8598844649 +52 28 55.571906268   15.79 15.64 15.76   DA3.8 25 0
28 GD 52 WD* 03 51 59.9439829426 +34 07 28.225145397   15.30   15.4   DA3.4 47 0
29 HZ 4 WD* 03 55 21.9881493731 +09 47 18.134000893 13.917 14.592 14.506 14.58 14.642 DA3.4 178 0
30 G 8-8 WD* 04 04 34.1280174803 +25 08 51.682967467   13.92   14.1   DA3.9 82 0
31 EGGR 29 WD* 04 09 28.9036045636 +17 07 54.391379835 14.66 15.378 15.323 15.408 15.515 DA3.2 105 0
32 HZ 10 WD* 04 10 10.3225404876 +18 02 23.801065504   14.29 14.14 14.60   DA3.5 55 0
33 HL Tau 76 WD* 04 18 56.6380318051 +27 17 48.312463115   15.40       DA4.3 131 0
34 GD 429 WD* 04 21 27.8795881473 +70 14 19.367873093   14.85   15.0   DA4.1 25 0
35 EGGR 35 WD* 04 21 48.8864074537 +15 29 14.979639327   16.8 16.62 16.9   DA3.6 21 0
36 EGGR 317 WD* 04 43 58.5620973420 +51 06 27.324836749   16.17 15.96 15.9   DA5.8 35 0
37 GD 64 WD* 04 57 22.5402020937 +41 55 56.476909537 13.480 14.039 13.976 14.050 14.122 DA3.5 46 0
38 GD 433 WD* 05 20 14.2480464751 +75 41 44.335787391   16.3   16.2   DA3.6 17 0
39 GD 67 WD* 05 20 36.5075715896 +00 37 30.666219909   16.2 16.64 16.6   DA3.6 18 0
40 EGGR 340 WD* 05 37 12.2069342173 +32 15 06.529896905   16.81   16.5   DA3.0 30 0
41 GD 77 WD* 06 41 12.8218209120 +47 44 19.651527548   14.93   14.9   DAP3.4 47 0
42 GD 83 WD* 07 13 21.6004333339 +21 34 06.914750486   15.48   15.1   DA4.7 28 0
43 GD 89 WD* 07 47 25.8753216339 +44 08 48.322173605   14.95   15.0   DA3.3 41 0
44 EGGR 58 WD* 08 20 01.3408953781 +38 34 35.522429789   16.94   16.4   DA6.5 48 0
45 EGGR 486 WD* 08 34 00.2631815007 +36 59 24.118689065   15.6   15.85   DA5.5 21 0
46 CD-32 5613 WD* 08 41 32.4293043356 -32 56 32.916852010   12.07 11.85 12.3   DA5.5 276 0
47 US 1670 WD* 08 47 46.8272647821 +45 10 06.391888072   18.5       DA 13 0
48 EGGR 64 WD* 09 16 40.7561121407 +43 59 41.591917131   15.56   15.3   DA5.8 59 0
49 PG 0920+217 WD* 09 23 39.2419076583 +21 29 00.338899582     16.50     DA2.7 13 0
50 LAWD 30 WD* 09 29 07.9843415144 -71 33 58.992364872   15.615 15.44 14.97 14.83 DA5.9 28 0
51 G 161-36 WD* 09 29 21.2878859828 -04 10 05.698212213   14.94 14.79 15.34   DA3.6 24 0
52 LAWD 32 WD* 09 46 39.0736152665 +43 54 52.235353533   13.39   13.8   DA3.8 96 0
53 WG 14 WD* 09 51 39.2009016214 -57 26 38.574110884   15.14 14.94     DA3.9 28 0
54 PG 0950+078 WD* 09 52 59.0780768774 +07 31 07.489626178   16.12   17.5   DA3.3 22 0
55 EGGR 69 WD* 09 57 48.3484344551 +24 32 55.540903624   15.34 15.09 14.4   DA5.8 57 0
56 PG 0956+046 WD* 09 58 37.2620356505 +04 21 30.866266850   15.95   15.6   DA2.7 27 0
57 PG 1022+050 WD* 10 24 59.8259661630 +04 46 10.498562889   14.37 14.20 14.2   DA3.5 48 0
58 PG 1026+024 WD* 10 29 09.8055055901 +02 05 53.669135423   14.34 14.20 14.46   DA3.8 31 0
59 PB 520 WD* 10 42 33.5414176920 +40 57 15.165426224   16.04       DA4.2 20 0
60 Ton 547 WD* 10 49 28.9006659335 +27 54 22.773313813   15.56 15.41     DA3.8 31 0
61 LAWD 33 WD* 10 55 13.5358632310 -55 19 05.160624893   14.22 14.32     DA3.4 34 0
62 Ton 1323 WD* 11 04 32.5722911355 +36 10 48.873727889   14.76 14.49     DA3.7 61 0
63 GD 129 WD* 11 11 20.7221071448 +47 18 26.446435738   15.61 15.39 15.80   DA3.8 21 0
64 GD 133 WD* 11 19 12.3989572558 +02 20 33.046829334   14.76 14.57 14.8   DA4.0 78 0
65 PG 1119+386 WD* 11 22 38.1316435818 +38 18 26.459164957   16.03       DA3.0 21 0
66 GD 307 WD* 11 25 18.8772900869 +54 19 36.209619068   15.5   15.5   DA3.3 42 0
67 LAWD 38 WD* 11 50 20.1723473719 +25 18 32.765371120   15.78   15.4   DA5 56 0
68 LP 734-74 WD* 12 06 56.2916485636 -13 53 53.042045072   15.72 15.53 15.6   DA4.4 27 0
69 V* EG UMa SB* 12 15 44.0979888334 +52 31 01.290014005   13.0 13.230 13.149   DA+dM 102 1
70 PG 1229-013 WD* 12 31 34.5018439039 -01 32 08.522496654   14.44 13.79 14.5   DA2.5 36 0
71 LB 16 WD* 12 44 16.5652188387 +23 14 10.414940149   15.40 15.2 16.2   DA1.8 26 0
72 EGGR 92 WD* 12 47 14.7135859851 +14 42 30.877662929   16.08   15.9   DA4.6 54 0
73 GD 320 WD* 12 55 26.3446290678 +47 57 19.252196643   16.5       DA3.4 26 0
74 BD-07 3632 WD* 13 30 13.6369525883 -08 34 29.470861983 11.803 12.398 12.340 12.39 12.436 DA3.5 174 0
75 SDSS J133831.75-002328.0 WD* 13 38 31.7500634928 -00 23 28.000225199           DA4 18 0
76 PG 1349+552 WD* 13 51 20.2511095296 +54 57 42.594177324   15.51       DA4.1 34 0
77 PG 1418-005 WD* 14 21 31.2059681781 -00 44 23.150476991   16.64 16.7     DA3.4 20 0
78 PG 1431+154 WD* 14 34 06.7713443279 +15 08 17.814507257   16.05   16.2   DA3.6 22 0
79 LAWD 56 WD* 14 50 49.3756970498 +07 33 33.867231695   15.50   15.4   DA3.4 57 0
80 GD 340 WD* 15 09 38.8626564255 +63 32 25.476393993   15.0 14.7     DA4.8 38 1
81 GD 176 WD* 15 10 29.0413266718 -10 45 19.417437958   15.65 15.42 15.2   DA4.9 28 0
82 EGGR 112 WD* 15 11 51.3668944203 +56 24 50.541845153   16.47   16.1   DA5.4 45 0
83 GD 186 WD* 15 33 49.3090596171 +18 18 55.208141411   16.36   16.1   DA3.7 18 0
84 GD 348 WD* 15 37 44.4369463459 +65 01 48.747516774   14.83   14.6   DA5.1 34 0
85 GD 189 WD* 15 42 14.2127624744 -03 41 31.291700786   15.45 15.20 15.0   DA5.0 32 0
86 HD 140901B WD* 15 47 30.0208012719 -37 55 08.458405808   13.10 12.80 13.53 12.34 DA4.8 83 0
87 GD 194 WD* 15 52 26.3787018090 +18 10 18.690252959   14.94   15.2   DA3.4 42 0
88 EGGR 174 WD* 15 58 04.8189341568 -09 08 07.933743422   14.89 14.80 14.3 14.98 DA3.4 38 0
89 EGGR 116 WD* 16 08 22.1888382580 +42 05 43.437369514   13.91   13.7   DA3.8 39 0
90 EGGR 117 WD* 16 11 25.6063415264 +13 22 17.940004792   15.33   15.2   DA5.4 67 0
91 GD 202 WD* 16 38 40.4040910150 +15 54 16.665916861   15.74 15.60     DA3.8 22 0
92 EGGR 120 WD* 16 39 27.8216532682 +33 25 22.241769713   14.83   14.6   DA4.9 63 0
93 PG 1643+144 ** 16 45 39.137880 +14 17 46.04712   15.82 15.36     DA2+dM 25 0
94 V* DN Dra WD* 16 48 25.6321433630 +59 03 22.663406299   12.34 12.17 12.44   DA4.0 200 0
95 GD 515 WD* 16 54 29.0574681303 +63 39 21.175483186   15.5   15.9   DA3.2 33 0
96 EGGR 197 WD* 16 57 09.8598913902 +21 26 48.662290058   14.32   14.1   DA5.4 81 0
97 EGGR 198 WD* 17 08 52.0483898275 +33 12 58.483877773   16.09 15.92     DA3.7 41 0
98 SDSS J171113.02+654158.4 WD* 17 11 12.9969555737 +65 41 58.282744903           DA 16 0
99 Wolf 672 A WD* 17 18 35.1636102144 +01 56 53.205524371       14.63   DA3.7 76 0
100 GD 362 WD* 17 31 34.3169169136 +37 05 20.709668210   16.3   16.4   DAZB 153 0
101 EGGR 175 WD* 17 45 54.5586314917 -13 17 55.388670387   14.38 14.22     DA3.9 37 0
102 Ross 137 WD* 18 27 13.0872422364 +04 03 46.792534528 13.383 13.981 13.889 13.928 13.958 DA+DC 73 0
103 EGGR 126 WD* 18 29 09.8621857317 -04 29 35.487964512   14.82 14.57 14.74   DA5.4 46 0
104 EGGR 177 WD* 18 30 39.4327319613 -10 36 59.929151196   15.41 15.28 15.82   DA3.6 32 0
105 EGGR 200 WD* 18 42 57.7478203893 -11 08 53.183339852       14.46 14.01 DA4.9 33 0
106 EGGR 128 WD* 18 59 49.2016356039 +11 58 40.271503737   15.72   15.3   DA5.0 32 0
107 G 142-B2B WD* 19 13 38.6750932557 +13 36 27.363375150 13.52     14.47   DA3.6 44 0
108 LAWD 78 WD* 19 55 46.9925687623 -20 31 03.251016764   15.09 15.06 15.27   DA3.5 30 0
109 LAWD 79 WD* 19 56 29.2263059604 -01 02 32.670599846   13.89 13.56 13.73   DA6.4 127 0
110 GD 387 WD* 20 05 38.4823011175 +43 54 31.565801120   16.0   15.8   DA2.9 21 0
111 GD 390 WD* 20 27 25.0343489012 +48 58 18.209588150   16.5   15.9   DA4.6 19 0
112 GD 230 WD* 20 32 02.8737758126 +18 31 14.967991752   16.47   17.1   DA3.7 22 0
113 EGGR 261 WD* 20 49 06.6997831624 +37 28 14.051804868   13.40   13.2   DA3.4 62 0
114 EGGR 377 WD* 21 02 02.6728838322 +19 12 57.670809096   16.77   16.2   DA7.2 37 0
115 LAWD 83 WD* 21 13 16.8542099131 -81 49 12.878202704 13.28 13.82 13.59 13.6   DA4.8 88 0
116 EGGR 378 WD* 21 18 56.2637318943 +54 12 41.241940564 11.76     12.9   DA3.4 88 1
117 LAWD 84 WD* 21 19 36.5324188585 -55 50 14.465612769 13.94 14.50 14.27 14.5   DA5.1 70 0
118 Ross 198 WD* 21 26 25.4558502441 +55 13 32.379701175 14.19 14.88 14.75 15.0 14.8 DA3.6 54 0
119 G 263-3 WD* 21 26 57.6568975270 +73 38 44.664588151 12.15 12.80 12.83 13.30   DA3.1 96 0
120 EGGR 582 WD* 21 38 46.1926338680 +23 09 21.490041640   15.39   14.6   DA4.9 45 0
121 EGGR 450 WD* 21 49 59.1885701911 +54 08 39.498906572   16.2   16.1   DA4.2 23 0
122 GD 397 WD* 21 52 02.8926588199 +37 26 19.112716757   15.34 15.04 15.57   DA3.7 26 0
123 GD 236 WD* 22 29 08.5719189533 +06 22 47.493582734   15.5   14.3   DA3.1 35 0
124 EGGR 155 WD* 22 49 05.5506899099 +22 36 31.990253835   14.55   13.8   DA4.7 93 0
125 EGGR 263 WD* 23 01 05.5062186987 +40 56 13.944665889   15.5       DA5.0 26 1
126 PG 2306+131 WD* 23 08 30.5124598921 +13 19 23.362383478   15.38 15.1 15.3   DA3.7 27 0
127 GD 556 WD* 23 14 04.3024166738 +55 28 14.112706120   16       DA3.0 27 0
128 PG 2314+064 WD* 23 16 50.2409213891 +06 41 28.416576218   16.01   16.0   DA2.7 16 0
129 PG 2322+207 WD* 23 24 35.1950559211 +20 56 33.829001730   15.55 15.47 15.82   DA3.7 22 0
130 EGGR 161 WD* 23 32 03.5210003680 +26 58 46.118132842   15.52   15.2   DAP4.2 43 0
131 WG 54 WD* 23 40 35.4696644070 -75 45 08.732268616   14.75 14.77 15.16   DA3.5 20 0
132 LAWD 93 WD* 23 43 50.7211092775 +32 32 46.726422307   13.06 12.94 13.12   DA3.8 135 0
133 LAWD 94 WD* 23 54 01.0724791071 -33 16 31.077867970   14.6 13.56     DA5.7 50 0

    Equat.    Gal    SGal    Ecl

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2021.05.09-07:14:38

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