1998A&AS..128..117V


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.29CET07:23:57

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: 27

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Number of rows : 27

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9607 1
2 HD 6884 s*b 01 07 18.2183812921 -72 28 03.658768522   10.32 10.2     B9Ia0ek 113 0
3 HD 7099 s*b 01 09 03.9537998546 -72 32 17.629696204   10.89 10.9     B2.5Ia 64 0
4 HD 7583 sg* 01 13 30.5011520569 -73 20 10.319586153 10.01 10.32 10.20     A0Ia0 102 0
5 HD 270920 * 04 59 09.0607867683 -65 40 03.724479386   10.80 9.91     G5I: 32 0
6 HD 269018 * 05 03 29.5850064565 -70 41 59.409128421 10.979 11.65 11.704   11.501 OB 23 0
7 HD 33579 sg* 05 05 55.5119227765 -67 53 10.930943931   9.32 9.13     A2Ia+ 126 0
8 HD 269128 s*b 05 10 22.7894940469 -68 46 23.818379498 9.77 10.52 10.412 10.29 10.268 B2.5Ieq 95 0
9 HD 269216 Em* 05 13 30.7809925326 -69 32 23.648218945 10.227 10.84 11.123 10.96 10.573 OBe 40 0
10 HD 271182 s*y 05 21 01.7107934366 -65 48 02.419934092   10.36 9.620     F8_0 89 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15060 1
12 HD 269541 sg* 05 26 34.8846268166 -68 52 07.336979462   10.53 10.43     A2Ia 35 0
13 HD 269594 * 05 28 20.3347142116 -67 24 18.314094562   11.28 10.69 10.32 9.95 G5I 38 0
14 HD 269660 s*b 05 30 47.7721628933 -71 04 02.327074797 10.281 11.15 11.19   10.767 B2Ia 51 0
15 HD 269697 s*y 05 31 38.4228564397 -67 28 11.561399999 10.99 10.69 10.28     F6Ia 49 0
16 HD 269781 sg* 05 34 22.4677357043 -67 01 23.570325836 9.34 9.94 9.87 9.74 9.67 A0Iae 47 0
17 HD 270305 * 05 53 49.7078185347 -68 18 47.352391525 11.037 11.666 11.610   11.697 B6I 22 0
18 HD 62150 s*b 07 41 13.3242733866 -32 38 38.210267489 7.88 8.20 7.67 8.48   B3Iab 62 0
19 * b Vel V* 08 40 37.5701711 -46 38 55.476997 4.86 4.52 3.81 3.16 2.62 F0Ia 127 0
20 HD 80077 s*b 09 15 54.7869106351 -49 58 24.573847509 10.50 10.29 9.00 7.89   B2Ia+e 125 0
21 HD 94878 bL* 10 55 58.9150038252 -60 23 33.434805592 8.67 9.37 8.70 8.07   B0/2eq 141 0
22 * x Car cC* 11 08 35.3899998 -58 58 30.135741 6.07 5.09 3.83 2.86 2.27 G5_0-Ia 143 0
23 HD 119796 ** 13 47 10.86726 -62 35 22.9574 10.24 9.05 6.80 4.74 3.54 G8Ia++B0Ibp: 120 0
24 HD 119796A s*y 13 47 10.875 -62 35 23.06   9.329 6.830 6.81   G8Ia+ 111 0
25 HD 148379 Be* 16 29 42.3271423063 -46 14 35.632001296 5.51 5.95 5.37 4.85 4.39 B2Iab 167 0
26 HD 168607 s*b 18 21 14.8855350307 -16 22 31.760520819 10.23 9.82 8.28 8.55   B9Iaep 175 1
27 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 253 2

    Equat.    Gal    SGal    Ecl

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2020.11.29-07:23:57

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