Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-01-10
Astrophys.J. 729 (2011) L9-L14
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
5 pages, 5 figures, emulateapj format, matches accepted ApJL version (v2: very minor changes)
Scientific paper
This paper presents the first distance measurement to the massive, semi-detached, eclipsing binary LMC-SC1-105, located in the LH 81 association of the Large Magellanic Cloud (LMC). Previously determined parameters of the system are combined with new near-infrared photometry and a new temperature analysis to constrain the reddening toward the system, and determine a distance of 50.6+/-1.6 kpc (corresponding to a distance modulus of 18.52+/-0.07 mag), in agreement with previous eclipsing binary measurements. This is the sixth distance measurement to an eclipsing binary in the LMC, although the first to an O-type system. We thus demonstrate the suitability of O-type eclipsing binaries (EBs) as distance indicators. We suggest using bright, early-type EBs to measure distances along different sight lines, as an independent way to map the depth of the LMC and resolve the controversy about its three-dimensional structure.
Bonanos Alceste Zoe
Castro Norberto
Kudritzki Rolf Peter
Macri Lucas M.
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