Follow up Investigation on a Possible Third Member of the Sirius System

Details Follow up Investigation on a Possible Third Member of the Sirius System Follow up Investigation on a Possible Third Member of the Sirius System

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11614d&link_type=abstract

HST Proposal ID #11614. Cycle 17

Physics

Scientific paper

We propose to follow up on a detection of a faint point source 0.6 arcseconds away from Sirius B. The possible discovery was made while analysing NICMOS images taken in an effort to characterize the multiplicity function of the solar neighborhood. The data are consistent with a brown dwarf of early T spectral type if we assume this source is at the distance of Sirius. We discuss several arguments for the reality of this detection, and propose an observing strategy optimized for bright targets in order to test for common proper motion and obtain better photometry. If confirmed, this discovery would put an end to the century-long debate on the multiplicity of the Sirius system. This would also be the closest brown dwarf known. The PI is a doctoral student working on a thesis on low mass stars and brown dwarfs.;

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