2007AJ....134..541K

Query : 2007AJ....134..541K

2007AJ....134..541K - Astron. J., 134, 541-546 (2007/August-0)

The Clusters Ages Experiment (CASE). II. The eclipsing blue straggler OGLEGC 228 in the globular cluster 47 Tuc.

KALUZNY J., THOMPSON I.B., RUCINSKI S.M., PYCH W., STACHOWSKI G., KRZEMINSKI W. and BURLEY G.S.

Abstract (from CDS):

We use photometric and spectroscopic observations of the eclipsing binary OGLEGC 228 (V228) to derive the masses, radii, and luminosities of the component stars. Based on measured systemic velocity, proper motion, and distance, the system is a blue straggler member of the globular cluster 47 Tuc. Our analysis shows that V228 is a semidetached Algol. We obtain M=1.512±0.022 M☉, R=1.357±0.019 R☉, and L=7.02±0.050 L☉ for the hotter and more luminous primary component and M=0.200±0.007 M☉, R=1.238±0.013 R☉, and L=1.57±0.09 L☉ for the Roche lobe-filling secondary.

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Journal keyword(s): Stars: Binaries: Close - Stars: Binaries: Spectroscopic - Galaxy: Globular Clusters: Individual: Name: 47 Tucanae - stars: individual (OGLEGC 228)

Simbad objects: 7

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Number of rows : 7
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 Cl* NGC 104 WSB V7 EB* 00 26 08.8627905552 -72 07 01.483751964     15.844 16.032 15.482 ~ 25 0
3 V* AS Eri SB* 03 32 25.1263057224 -03 18 48.095135748   8.49 8.30     A3V+K0III 177 0
4 V* R CMa SB* 07 19 28.1785241208 -16 23 42.895279824 6.09 6.05 5.70     F2III/IV 290 0
5 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
6 HD 138549 PM* 15 33 53.5577375136 -31 01 08.577802344   8.67 7.96     G8IV-V 95 0
7 V* SX Phe SX* 23 46 32.8928138474 -41 34 54.769886474   7.54 7.31     A3V 348 0

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