Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344223i&link_type=abstract
American Astronomical Society, AAS Meeting #213, #442.23; Bulletin of the American Astronomical Society, Vol. 41, p.323
Astronomy and Astrophysics
Astrophysics
Scientific paper
We describe a method of identifying binary stars using multi-wavelength photometric data. The identification is achieved by fitting model spectral energy distributions (SEDs) to fluxes derived from broad-band photometry covering 0.3--8.0 microns. From these fits we also get an estimation of the stellar mass and in the case of binary stars the primary mass and mass ratio. The method is applied to the main sequence of the open cluster NGC 188 using optical (UBVRI), near-infrared (J H K_s), and mid-infrared (IRAC [3.6], [4.5], [5.8], and [8.0] microns) data. Model SEDs are constructed from the Kurucz stellar atmosphere models. This photometric method is complementary to radial velocity techniques which only reach V < 16.5, permitting us to identify faint and wide binary stars that would otherwise be prohibitively difficult to detect.
This work was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-0602221 is based on observations made with the Spitzer Space Telescope (GO-3 0800), which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.
Frinchaboy Peter
Irwin Trevor
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