Issue |
A&A
Volume 366, Number 3, February II 2001
|
|
---|---|---|
Page(s) | 752 - 764 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20010014 | |
Published online | 15 February 2001 |
The LMC eclipsing binary HV 2274 revisited
1
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Straße 1, 85740 Garching, Germany
2
European Southern Observatory, EIS-team, Karl-Schwarzschild-Straße 2, 85740 Garching, Germany
3
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
Corresponding author: M. A. T. Groenewegen, mgroenew@eso.org
Received:
2
October
2000
Accepted:
13
November
2000
We reanalyse the UV/optical spectrum and optical broad-band data of
the eclipsing binary HV 2274 in the LMC, and derive its distance
following the method given by Guinan et al. ([CITE],[CITE]) of fitting
theoretical spectra to the stars' UV/optical spectrum plus optical
photometry. We describe the method in detail, pointing out the
various assumptions that have to be made; moreover, we discuss the
systematic effects of using different sets of model atmospheres and
different sets of optical photometric data. It turns out that
different selections of the photometric data, the set of model
atmospheres and the constraints on the value of the ratio of selective
to total extinction in the V-band, result in a 25% range in
distances (although some of these models have a large ).
For our best choice of these quantities the derived value for the
reddening to HV 2274 is
= 0.103 ± 0.007, and the
de-reddened distance modulus is
± 0.06; the DM to
the center of the LMC is found to be 18.42 ± 0.07. This is
significantly larger than the DM of 18.30 ± 0.07 derived by Guinan
et al. ([CITE]).
Key words: binaries: eclipsing / stars: distances / stars: individual (HV 2274) / Magellanic Clouds / distance scale
© ESO, 2001
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