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 M_bol 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

Full paper

View the references in ADS

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 - 2023	#notes
1	NAME SMC	G	00 52 38.0	-72 48 01		2.79	2.2			~	10601	1
2	HD 6884	s*b	01 07 18.2182685856	-72 28 03.657105156		10.32	10.2			B9Ia0ek	121	0
3	HD 7099	s*b	01 09 03.9542485824	-72 32 17.627859960		10.89	10.9			B2.5Ia	68	0
4	HD 7583	sg*	01 13 30.5007669648	-73 20 10.319785260	10.01	10.32	10.20			A0Ia0	112	0
5	HD 270920	*	04 59 09.0605370384	-65 40 03.723642912		10.80	9.91			G5I:	40	0
6	HD 269018	*	05 03 29.5852380288	-70 41 59.407404648	10.979	11.65	11.704		11.501	OB	28	0
7	HD 33579	sg*	05 05 55.5114721104	-67 53 10.932988848		9.32	9.13			A2Ia+	138	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	103	0
9	HD 269216	Em*	05 13 30.7805703864	-69 32 23.647476948	10.227	10.84	11.123	10.96	10.573	OBe	49	0
10	HD 271182	s*y	05 21 01.7107333512	-65 48 02.420745444		10.36	9.620			F8_0	100	0
11	NAME LMC	G	05 23 34.6	-69 45 22			0.4			~	16639	1
12	HD 269541	sg*	05 26 34.8842550480	-68 52 07.335871572		10.53	10.43			A2Ia	40	0
13	HD 269594	*	05 28 20.3343956112	-67 24 18.316171188		11.28	10.69	10.32	9.95	G5I	48	0
14	HD 269660	s*b	05 30 47.7753524136	-71 04 02.325450144	10.281	11.15	11.19		10.767	B2Ia	55	0
15	HD 269697	s*y	05 31 38.4223359696	-67 28 11.562011760	10.99	10.69	10.28			F6Ia	58	0
16	HD 269781	sg*	05 34 22.4676706872	-67 01 23.569790196	9.34	9.94	9.87	9.74	9.67	A0Iae	56	0
17	HD 270305	*	05 53 49.7075742072	-68 18 47.352510576	11.037	11.666	11.610		11.697	B6I	27	0
18	HD 62150	s*b	07 41 13.3241936472	-32 38 38.211445608	7.88	8.20	7.67	8.48		B3Iab	68	0
19	* b Vel	V*	08 40 37.5701711	-46 38 55.476997	4.86	4.52	3.81	3.16	2.62	F0Ia	133	0
20	HD 80077	s*b	09 15 54.7869062472	-49 58 24.575734452	10.50	10.29	9.00	7.89		B2Ia+e	138	0
21	HD 94878	EB*	10 55 58.9149262296	-60 23 33.436864428	8.67	9.37	8.70	8.07		B0/2eq	152	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	149	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+	131	0
24	HD 148379	Be*	16 29 42.3277745448	-46 14 35.630932596	5.51	5.95	5.37	4.85	4.39	B2Iab	177	0
25	HD 168607	s*b	18 21 14.8856951904	-16 22 31.763755236	10.23	9.82	8.28	8.55		B9Iaep	185	1
26	HD 168625	s*b	18 21 19.5484021368	-16 22 26.075142156	10.15	9.78	8.37	8.76		B6Iap	272	2

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