2003A&A...402..509C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET11:24:13

2003A&A...402..509C - Astronomy and Astrophysics, volume 402, 509-530 (2003/5-1)

Eclipsing binaries in the Magellanic Clouds: uvby CCD light curves and photometric analyses for HV 982 (LMC), HV 12578 (LMC), HV 1433 (SMC), and HV 11284 (SMC).

CLAUSEN J.V., STORM J., LARSEN S.S. and GIMENEZ A.

Abstract (from CDS):

We present new accurate CCD uvby light curves for the LMC eclipsing binaries HV 982 and HV 12578, and for the SMC systems HV 1433 and HV 11284 obtained at the Danish 1.5m telescope at ESO, La Silla. The light curves were derived from DoPHOT photometry, and typical accuracies are between 0.007 and 0.012mag per point. Standard uvby indices have also been established for each binary, primarily for determination of interstellar reddening and absorption. For HV 982 and HV 12578, accurate photometric elements have been established. Both systems consist of two detached components of comparable sizes in an eccentric orbit. Adopting the spectroscopic elements given by Fitzpatrick et al. (2002ApJ...564..260F) for HV 982, we derive absolute dimensions of its components which agree well with their results. A distance modulus of V0-MV=18.63±0.08 is obtained, corresponding to a distance of 53.2±2.0kpc, which is in formal agreement with (although slightly larger than) their determination. HV 1433 and HV 11284 both consist of two rather close, deformed and quite different stars. As the mass ratios between the components (and their rotation rates) are not known, definitive photometric elements can not yet be obtained, but we present a sample of possible photometric solutions. In a series of forthcoming papers we will combine our uvby observations with high-dispersion spectra from the UVES spectrograph on the ESO Very Large Telescope (VLT) and present absolute dimensions, chemical abundances and distances for selected LMC and SMC systems, including HV 12578 and refined results for HV 982.

Abstract Copyright:

Journal keyword(s): cosmology: distance scale - galaxies: Magellanic clouds - stars: fundamental parameters - stars: binaries: close - stars: binaries: eclipsing - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/402/509): tables 25-40 summary.dat>

Simbad objects: 20

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Number of rows : 20

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 SV* HV 1346 EB* 00 40 05.9422454894 -73 51 05.249148328 14.00 18.28 15.80   15.66 B8(III) 7 0
2 SV* HV 1433 EB* 00 47 11.17 -73 41 19.9     15.506   15.621 ~ 6 0
3 SV* HV 11284 EB* 00 49 43.0822255567 -72 51 09.495274060 14.20 15.13 15.17 15.30 15.35 B1.5+B2 13 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9702 1
5 SV* HV 1597 EB* 00 54 01.321 -71 55 36.77     16.915   16.954 ~ 3 0
6 SV* HV 1620 EB* 00 54 38.2334572149 -72 32 06.415047211 13.36 14.34 14.45 14.62 14.68 B0.5(IV)e? 32 0
7 SV* HV 1761 EB* 00 58 24.4227789798 -72 05 32.513054712 14.52 15.56 15.75   16.32 B0.5:+B 9 0
8 SV* HV 1876 EB* 01 01 51.7682258167 -72 21 54.354402997   15.05 15.22 15.43 15.32 ~ 10 0
9 SV* HV 2016 EB* 01 06 24.8851794140 -72 12 48.650136524 13.56 14.54 14.79 14.83 15.21 ~ 13 0
10 V* BD Tuc EB* 01 16 40.3781265426 -72 40 27.163601389 14.27 14.98 15.20   15.52 B1-5(II) 13 0
11 SV* HV 2226 EB* 01 24 31.7400170219 -73 21 49.246061489   15.11 15.205   15.395 B1-3(III) 19 0
12 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5863 1
13 SV* HV 2241 V* 04 57 15.7355115776 -66 33 54.284097358   13.82 13.96     O6-8V-III((f)) 28 0
14 SV* HV 2274 EB* 05 02 40.7806907576 -68 24 21.497024742 13.298 13.984 14.127 14.192 14.390 ~ 76 0
15 SV* HV 12012 EB* 05 19 11.7873771387 -69 42 24.840934999 14.404 15.396 15.135   15.699 ~ 25 0
16 SV* HV 12578 EB* 05 21 31.48 -66 21 14.6   15.84 15.747 16.18 15.871 ~ 6 0
17 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15206 1
18 SV* HV 2543 V* 05 27 27.3921523578 -67 11 54.504435858 11.913 13.014 13.206   13.055 OB 21 0
19 SV* HV 982 EB* 05 29 52.31 -69 09 22.6   14.76 14.648 14.99 14.761 ~ 46 0
20 SV* HV 5936 EB* 05 33 38.82 -66 37 40.0   15.01 14.741 15.25 14.911 ~ 32 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-11:24:13

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