SIMBAD references

2013MNRAS.432.2895H - Mon. Not. R. Astron. Soc., 432, 2895-2908 (2013/July-2)

Tracing the structure of the Milky way with detached eclipsing binaries from the VVV survey - I. The method and initial results.

HELMINIAK K.G., DEVOR J., MINNITI D. and SYBILSKI P.

Abstract (from CDS):

We present the first results of a project aiming to trace the spatial structure of the Milky Way using detached eclipsing binaries (DEBs) as distance indicators. A sample of DEBs from the OGLE-II catalogue was selected and their near-infrared photometry was taken from the Vista Variables in the Via Lactea (VVV) survey. The I-band OGLE-II light curves are used to create models of the DEBs, which together with the VVV photometry are compared with a set of theoretical isochrones. After correcting for stellar reddening, we find a set of absolute physical parameters of components of a given binary, including absolute magnitudes and distances.

With this approach we can calculate the distances with the precision better than 5percent. Even though we have a few systems, the distribution is not homogeneous along the line of sight, and appears to follow the overall structure of the Galaxy - several spiral arms and the bulge are distinguishable. A number of systems can be seen behind the bulge, reaching even the distance to the Sagittarius dwarf galaxy.


Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): binaries: eclipsing - Galaxy: structure

Simbad objects: 39

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