https://doi.org/10.1051/epjconf/201715207008
Distance scale calibration based on early-type binaries
1 Centrum Astronomiczne im. Miko³aja Kopernika (CAMK), PAN, Bartycka 18, 00-716 Warsaw, Poland
2 Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101-1292, USA
Published online: 8 September 2017
Our main goal is to establish a firm empirical calibration of the surface brightness vs. (V-K) color relation for early type stars based on high quality spectroscopic and infrared observations of early-type detached eclipsing systems in the Large Magellanic Cloud (LMC). Our calibration of this relation will allow distance determinations accurate to about 2.5% to a single object located well beyond the Magellanic Clouds. This will let us calibrate other distance indicators, including period-luminosity relations for Cepheids. The first step of the project is to determine precise parameters for a sample of B-type systems in the LMC. We have already made a preliminary analysis of light and radial velocity curves for selected objects and measured their masses and radii. Here we present the results for one such system.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
