2012ApJ...748...69M

Query : 2012ApJ...748...69M

2012ApJ...748...69M - Astrophys. J., 748, 69 (2012/March-3)

CORS baade-wesselink distance to the LMC NGC 1866 blue populous cluster.

MOLINARO R., RIPEPI V., MARCONI M., MUSELLA I., BROCATO E., MUCCIARELLI A., STETSON P.B., STORM J. and WALKER A.R.

Abstract (from CDS):

We used optical, near-infrared photometry, and radial velocity data for a sample of 11 Cepheids belonging to the young LMC blue populous cluster NGC 1866 to estimate their radii and distances on the basis of the CORS Baade-Wesselink method. This technique, based on an accurate calibration of surface brightness as a function of (U - B), (V - K) colors, allows us to estimate, simultaneously, the linear radius and the angular diameter of Cepheid variables, and consequently to derive their distance. A rigorous error estimate on radii and distances was derived by using Monte Carlo simulations. Our analysis gives a distance modulus for NGC 1866 of 18.51±0.03 mag, which is in agreement with several independent results.

Abstract Copyright: ∼

Journal keyword(s): distance scale - globular clusters: individual: NGC 1866 - Magellanic Clouds - stars: variables: Cepheids

Simbad objects: 18

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Number of rows : 18

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	* 4 Cet	V*	00 07 44.1111674208	-02 32 55.248548028	5.82	6.29	6.43			ApSi	88	0
2	HD 319	PM*	00 07 46.8995868600	-22 30 30.805174800		6.055	5.923			A1VbmA2_lB	105	0
3	HD 344	HB*	00 08 03.4868999832	-33 31 45.568976952		6.787	5.662			K1III	37	0
4	NAME Magellanic Clouds	GrG	03 00	-71.0						~	6826	1
5	SV* HV 12197	Ce*	05 13 13	-65 30.8		16.741	16.102			~	28	0
6	SV* HV 12199	Ce*	05 13 19	-65 29.5		16.916	16.289			~	30	0
7	SV* HV 12198	cC*	05 13 26.6692125288	-65 27 04.932684468		16.627	15.970		15.230	~	40	0
8	Cl* NGC 1866 SAB V4	Ce*	05 13 37.8	-65 26 55		16.715	16.068			~	15	1
9	NGC 1866	GlC	05 13 38.920	-65 27 52.75						~	414	0
10	SV* HV 12202	Ce*	05 13 39	-65 29.0		16.756	16.080			~	28	0
11	SV* HV 12203	Ce*	05 13 40	-65 29.6		16.811	16.140			~	29	0
12	MACHO 59.5436.172	Ce*	05 13 41.911	-65 27 59.98		16.696	16.54	16.02		~	13	0
13	Cl* NGC 1866 WE 1	Ce*	05 13 42.4	-65 27 10		16.622	15.973			~	12	0
14	Cl* NGC 1866 ROB B430	Ce*	05 13 42.9	-65 27 00		16.773	16.159			~	13	0
15	SV* HV 12204	cC*	05 13 57.8740222848	-65 28 39.333037188		16.18	15.715		15.076	~	32	0
16	NAME LMC	G	05 23 34.6	-69 45 22			0.4			~	16982	1
17	Cl* NGC 1866 WE 8	Ce*	~	~		16.76	16.15			~	9	0
18	Cl* NGC 1866 WE 2	Ce*	~	~						~	11	0

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