1998A&AS..128..117V

Query : 1998A&AS..128..117V

1998A&AS..128..117V - Astron. Astrophys., Suppl. Ser., 128, 117-129 (1998/February-2)

Hipparcos photometry of 24 variable massive stars (α Cygni variables).

VAN LEEUWEN F., VAN GENDEREN A.M. and ZEGELAAR I.

Abstract (from CDS):

The photometric variability of 24 α Cyg variables, i.e. variable super-and hypergiants, observed by the Hipparcos satellite is described. Three of the selected stars are situated in the SMC, 12 in the LMC and the remaining 9 in the Galactic plane. Four of them are hot S Dor-type variables, or LBVs (luminous blue variables) and two are possible members of this class. Light curves are presented for all stars. For five stars, among which one LBV, the variability was discovered from the Hipparcos photometric data.
Result. of period searches are presented and, when relevant, folded light curves are shown. The linear ephemeris of two variables was revised. For most of the program stars the Hipparcos magnitude scale (Hp) differs from the V of the UBV system by ≲0.1mag . For all variables temperatures and Mbol are given. Galactic foreground reddening for the objects in the Magellanic Clouds are given based on IRAS maps.

Abstract Copyright: ∼

Journal keyword(s): stars: variables - stars: supergiants - techniques: photometric - magellanic clouds

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 HD 6884 s*b 01 07 18.2182685856 -72 28 03.657105156   10.32 10.2     B9Ia0ek 134 0
3 HD 7099 s*b 01 09 03.9542485824 -72 32 17.627859960   10.89 10.9     B2.5Ia 72 0
4 HD 7583 sg* 01 13 30.5007669648 -73 20 10.319785260 10.01 10.32 10.20     A2Ia 120 0
5 HD 270920 * 04 59 09.0605370384 -65 40 03.723642912   10.80 9.91     G5I: 44 0
6 HD 269018 * 05 03 29.5852380288 -70 41 59.407404648 10.979 11.65 11.704   11.501 OB 31 0
7 HD 33579 sg* 05 05 55.5114721104 -67 53 10.932988848   9.32 9.13     A2Ia+ 148 0
8 HD 269128 s*b 05 10 22.7893360416 -68 46 23.816621928 9.77 10.52 10.412 10.29 10.268 B2.5Ieq 113 0
9 HD 269216 Em* 05 13 30.7805703864 -69 32 23.647476948 10.227 10.84 11.123 10.96 10.573 OBe 55 0
10 HD 271182 s*y 05 21 01.7107333512 -65 48 02.420745444   10.36 9.620     F8_0 110 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
12 HD 269541 sg* 05 26 34.8842550480 -68 52 07.335871572   10.53 10.43     A2Ia 44 0
13 HD 269594 * 05 28 20.3343956112 -67 24 18.316171188   11.28 10.69 10.32 9.95 G5I 53 0
14 HD 269660 s*b 05 30 47.7753524136 -71 04 02.325450144 10.281 11.15 11.19   10.767 B2Ia 64 0
15 HD 269697 s*y 05 31 38.4223359696 -67 28 11.562011760 10.99 10.69 10.28     F6Ia 64 0
16 HD 269781 sg* 05 34 22.4676706872 -67 01 23.569790196 9.34 9.94 9.87 9.74 9.67 A0Iae 64 0
17 HD 270305 * 05 53 49.7075742072 -68 18 47.352510576 11.037 11.666 11.610   11.697 B6I 31 0
18 HD 62150 s*b 07 41 13.3241936472 -32 38 38.211445608 7.88 8.20 7.67 8.48   B3Iab 71 0
19 * b Vel s*y 08 40 37.5712078616 -46 38 55.464392884 4.86 4.52 3.81 3.16 2.62 F0Ia 143 0
20 HD 80077 s*b 09 15 54.7869062472 -49 58 24.575734452 10.50 10.29 9.00 7.89   B2.5Ia+ 156 0
21 HD 94878 ** 10 55 58.9149262296 -60 23 33.436864428 8.67 9.37 8.70 8.07   B0/2eq 159 0
22 * x Car cC* 11 08 35.3887658400 -58 58 30.139080572 6.07 5.09 3.83 2.86 2.27 G5_0-Ia 156 0
23 HD 119796 s*y 13 47 10.8637122288 -62 35 22.949098944 10.24 9.05 6.80 4.74 3.54 G8Ia+ 147 0
24 HD 148379 s*b 16 29 42.3277745448 -46 14 35.630932596 5.51 5.95 5.37 4.85 4.39 B2Iab 191 0
25 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Ia+ 196 1
26 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B8Ia+ 293 2

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