Astrometric Binaries with a Variable Component

Details Astrometric Binaries with a Variable Component Astrometric Binaries with a Variable Component

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576..575h&link_type=abstract

"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me

Astronomy and Astrophysics

Astronomy

Astrometry, Stars Variables General, Binaries General

Scientific paper

We present two models dedicated to unresolved binary systems hosting a photometric variable: the first is the `VIM' (for Variability Induced Movers) model, which deals with couples of fixed stars. The second consists of the calculation of the astrometric orbit of the so-called `orbital VIM' systems; in this case, the photometric variability of the system is used to derive the semi-major axis of the orbit of the variable component around the barycentre, instead of the usual photocentric orbit. Additional information about the physical properties of the system are thus obtained.

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