2007A&A...472..241G

Query : 2007A&A...472..241G

2007A&A...472..241G - Astronomy and Astrophysics, volume 472241-246 (2007/9-2)

UV flux distributions of γ Doradus stars.

GERBALDI M., FARAGGIANA R. and CAFFAU E.

Abstract (from CDS):

It seems that the recently identified class of pulsating stars, the γ Dor type-variables, includes objects with different metal abundances and a large percentage of binaries. We looked for indicators of metal abundance peculiarities and stellar binarity in a sample of 40 confirmed γ Dor stars. Absolute magnitudes from Hipparcos parallaxes and UV magnitudes, from the S2/S68 experiment on board the TD1 satellite, are retrieved from databases and compared with predicted values. A set of non variable normal stars is used to check the consistency of this analysis and also serve as reference stars. Twenty-nine stars of the γ Dor star sample, which is 73% of it, are discovered having abnormal UV fluxes constantly showing UV flux excesses compared to those computed with the atmospheric parameters (Teff, logg, and metallicity) determined from calibration of the uvbyβ indices. The reason for this UV excess of flux at 196.5nm and at 236.5nm, which was previously known only for HD 209295, cannot be ascribed to binarity alone. An extra source of UV flux or less UV absorption - yet unknown - must be present.

Abstract Copyright: ∼

Journal keyword(s): stars: atmospheres - stars: binaries: spectroscopic - stars: variables: general - stars: peculiar

VizieR on-line data: <Available at CDS (J/A+A/472/241): table1.dat table2.dat table3.dat notes.dat>

Simbad objects: 83

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Number of rows : 83
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 V* BU Psc gD* 00 02 02.6171019192 -02 45 58.215204612   7.20 6.92     A9V/IV 57 0
2 * 44 Cet dS* 01 24 02.5388041128 -08 00 26.692716708   6.44 6.21     A9V 90 0
3 * 47 Cet * 01 26 51.5647682880 -13 03 23.439954456   5.808 5.505     F0.5V 89 0
4 V* V529 And gD* 01 27 26.6728869648 +41 06 04.177819368   6.711 6.425     A7m 89 0
5 * chi Cet PM* 01 49 35.1027660619 -10 41 11.070999501 5.04 5.00 4.68 4.38 4.22 F0V 215 0
6 V* FO Cet gD* 02 06 10.7295184296 -10 16 34.380991380   7.03 6.73     F0V 53 0
7 V* KU Eri gD* 02 46 33.9619467168 -06 42 06.835801572   8.14 7.78     F0V 36 0
8 * mu. Hor PM* 03 03 36.8187799608 -59 44 15.988527744   5.454 5.122     F0III/IV 66 0
9 * gam Dor gD* 04 16 01.5866224848 -51 29 11.932714356   4.55 4.20     F1V 337 0
10 * h Tau dS* 04 19 57.7045712640 +14 02 06.732211488   5.856 5.568 5.407 5.250 F0IV 243 0
11 HD 27429 PM* 04 20 25.1019130632 +18 44 33.652197312   6.478 6.094 5.874 5.653 F2Vn 129 0
12 * 60 Tau dS* 04 22 03.5181398136 +14 04 37.912925064   6.054 5.710 7.05 5.38 kA3hF2mF2(III) 288 0
13 * 76 Tau SB* 04 28 23.4077842656 +14 44 27.451968756   6.227 5.892 5.694 5.501 F0IV 154 0
14 * 80 Tau ** 04 30 08.59775 +15 38 16.2194   5.887 5.552 5.358 5.161 F0V 189 0
15 * 83 Tau ** 04 30 37.3629243168 +13 43 27.848332992   5.655 5.395 5.245 5.093 F0IV 163 0
16 * 85 Tau PM* 04 31 51.7588453752 +15 51 05.846138784   6.342 5.998 5.799 5.604 F1.5Vn 138 0
17 * rho Tau dS* 04 33 50.9178322656 +14 50 39.941657592 4.98 4.90 4.65 4.41 4.29 A8V 237 0
18 * 89 Tau ** 04 38 09.4406126112 +16 01 59.722631112   6.102 5.776     F0V 133 0
19 * alf Cae PM* 04 40 33.7125133631 -41 51 49.504549835 4.79 4.79 4.45 4.11 3.90 F2V 134 0
20 * bet Cae PM* 04 42 03.4822983552 -37 08 39.588865224   5.42 5.05     F3IV 102 0
21 HD 30034 PM* 04 44 25.8285113424 +11 08 46.083452208   5.638 5.379 5.230 5.082 F0V 140 0
22 HD 31236 PM* 04 54 58.3616755344 +19 29 07.392918948   6.640 6.347 6.172 6.005 F1V(n) 123 0
23 * 9 Aur gD* 05 06 40.6306032888 +51 35 51.798998724       4.8   F2V 201 0
24 * eta Lep PM* 05 56 24.2934904501 -14 10 03.718335613 4.05 4.05 3.72 3.39 3.23 F2V 352 0
25 V* V350 CMa gD* 06 42 46.0439059320 -22 26 54.936081132   6.56 6.23     F2V 73 0
26 V* V553 Aur gD* 06 44 11.7491335008 +36 59 38.401739880   7.79 7.47     F0 31 0
27 HD 49015 ** 06 46 40.7391397296 +08 21 47.310879636   7.38 7.04     F0IV 56 0
28 * pi. CMa PM* 06 55 37.4304387192 -20 08 11.388856308   5.027 4.664     F1.5V 89 0
29 * I Pup a2* 07 12 33.6251363845 -46 45 33.496585918 4.80 4.81 4.49 4.17 3.95 F3VFe-1.0 146 0
30 * del Gem SB* 07 20 07.3745658105 +21 58 56.294578663 3.91 3.87 3.53 3.17 2.98 F2VkF0mF0 255 0
31 V* DO Lyn gD* 07 45 42.3382459896 +39 32 48.998050476   7.45 7.13     F0 44 0
32 V* V436 Gem gD* 07 56 24.5774095944 +31 41 44.069002548   7.90 7.56     F0 25 0
33 V* V769 Mon gD* 07 59 03.9468373776 -04 19 56.702793684   7.26 6.97     A9/F0IV 38 0
34 V* KO UMa gD* 08 15 42.0771497040 +66 10 32.051525088   7.49 7.13     F2 44 0
35 V* EF Lyn gD* 08 19 31.7615909208 +35 02 44.407942080   7.48 7.17     A5 32 0
36 * h UMa PM* 09 31 31.7080711355 +63 03 42.695823224 4.10 4.00 3.67 3.33 3.15 F0V 147 0
37 V* V416 Hya gD* 09 57 39.6750143064 -16 31 19.668897516   6.92 6.61     F0V 38 0
38 HD 86358 SB* 09 58 26.0389184232 +27 45 32.396952132 6.790 6.800 6.460     F2V 63 0
39 V* LW Vel dS* 10 13 22.8441405312 -51 13 58.690503876   5.519 5.265     F0IV 59 0
40 * eps Sex PM* 10 17 37.8025445140 -08 04 08.087235049   5.559 5.240     F0IV 108 0
41 * 37 UMa PM* 10 35 09.6937360824 +57 04 57.487315116   5.481 5.148     F2V 194 0
42 * chi Leo PM* 11 05 01.0278085241 +07 20 09.624129314   4.94 4.62 4.4   F2III 120 0
43 * 80 Leo gD* 11 25 50.0566217880 +03 51 36.229759272   6.687 6.354     F2IVnn 62 0
44 V* MS Com gD* 12 06 00.8356637592 +23 12 16.430289480   7.79 7.48     F5 46 0
45 * alf Crv PM* 12 08 24.8172764085 -24 43 43.952148016   4.33 4.01     F1V 202 0
46 V* DD CVn gD* 12 24 56.9347475952 +42 51 17.137097928   7.51 7.14     F2V 69 0
47 HD 109799 gD* 12 37 42.2793762600 -27 08 19.987900512   5.736 5.410     F2IV 101 0
48 * 8 Dra gD* 12 55 28.5485641728 +65 26 18.507128532   5.516 5.225     F3IV 100 0
49 * 78 UMa ** 13 00 43.69949 +56 21 58.8102   5.29 4.93     F2V 283 0
50 HD 113867 gD* 13 06 22.7100385896 +22 16 47.625214980   7.115 6.825     F4VmA6 37 0
51 * 58 Vir gD* 13 17 27.3256669272 -10 32 46.642703136   7.23 6.89     F1IV/V 40 0
52 * 97 Vir gD* 14 12 33.4634121432 -09 54 00.290907720   7.46 7.17     A8-A7V 34 0
53 * mu. Vir PM* 14 43 03.6239867612 -05 39 29.524956308 4.25 4.26 3.88 3.48 3.26 F2V 239 0
54 * 16 Lib PM* 14 57 10.9988855472 -04 20 47.251261752 4.86 4.81 4.49 4.17 4.00 F2V 135 0
55 * mu.01 Boo ** 15 24 29.4314684952 +37 22 37.761321648       4.1   F0IV 204 0
56 * bet TrA PM* 15 55 08.5620636 -63 25 50.615531 3.19 3.14 2.85 2.53 2.38 F1V 174 0
57 V* CL Dra dS* 15 57 47.4406627440 +54 44 59.149579992   5.22 4.96     F1IVab 120 0
58 V* V645 Her gD* 16 55 01.3266397632 +29 02 19.925608236   7.85 7.54     A5 49 0
59 V* VX UMi gD* 17 01 40.1126486160 +75 17 50.983079316 6.490 6.480 6.180     F2IVnn 55 0
60 * d Oph PM* 17 27 21.2756332194 -29 52 01.325368180   4.672 4.269     F5III-IV 114 0
61 HD 160295 RR? 17 38 57.8737108512 +02 39 30.448241136   8.12 7.70     F2/3V 45 0
62 HD 160314 gD* 17 39 04.5391289832 +02 03 15.045604596   8.10 7.74     F2IV 43 0
63 * zet Ser PM* 18 00 29.0100539320 -03 41 24.977568563   4.982 4.616     F2V 203 0
64 V* V2118 Oph gD* 18 01 33.2032926288 +11 17 08.732552604   7.37 7.01     F2IV-V 73 0
65 HD 165645 gD* 18 05 00.8067796248 +41 56 46.658872716   6.641 6.374     F1Vnn 57 0
66 * 73 Oph ** 18 09 33.89271 +03 59 35.8059           F3V 142 0
67 V* V2502 Oph gD* 18 17 04.8404548584 +01 00 20.632225968   6.91 6.61     F2V 116 0
68 V* V1709 Aql gD* 18 54 54.3634752576 +01 07 17.706958896   7.714 7.36     F2V 48 0
69 * eps CrA SB* 18 58 43.3827144528 -37 06 26.380732536   5.24 4.85     F4VFe-0.8+ 224 0
70 * 59 Dra PM* 19 09 09.8814606288 +76 33 37.813819608   5.400 5.107     A7V 138 1
71 V* V5546 Sgr gD* 19 24 01.6472856864 -33 32 32.322550848   7.92 7.65     F0V 28 0
72 * del Aql ** 19 25 29.90139 +03 06 53.2061 3.72 3.68 3.36 3.11 2.95 F1IV-V(n) 247 0
73 * 43 Cyg gD* 20 27 02.2674936096 +49 23 00.104394552   6.024 5.715     F0V: 64 0
74 * eta Ind dS* 20 44 02.3339803529 -51 55 15.493271117   4.767 4.495     A9IV 93 0
75 V* NZ Peg RR? 21 39 01.1887179552 +20 15 55.623301164   6.065 5.762     F1Vnn 76 0
76 V* V372 Peg gD* 21 47 04.7602608072 +17 11 38.546127456   6.507 6.174     F3V 69 0
77 V* CK Ind gD* 22 04 38.4298621464 -64 43 42.005408160   7.57 7.32     A9/F0V-IV 89 0
78 * eps Cep SB* 22 15 02.1972987635 +57 02 36.846735569   4.47   4.0   F0V(Sr) 237 0
79 * 39 Peg gD* 22 32 35.4807389712 +20 13 48.075873816 6.770 6.770   6.2   F1V 79 0
80 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1285 0
81 * 7 And PM* 23 12 33.0035121942 +49 24 22.345927341 4.85 4.81 4.52 4.23 4.07 F1V 162 0
82 V* V418 Peg gD* 23 35 37.5281725056 +14 35 37.170888756   7.72 7.444     A3m 37 0
83 V* BT Psc gD* 23 59 35.0408156736 -01 50 59.712596160   7.78 7.48     F2-F3IV 54 0

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