Computer Science
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...73w&link_type=abstract
XMM-Newton Proposal ID #06028310
Computer Science
Stars, White Dwarfs, Solar System, G 266-33, Lhs 2722, Hd 79555, G 171-58, G 200-28
Scientific paper
We have discovered 10 wide low mass companions to main sequence stars through a common proper motion search. We propose to obtain X-ray data of the primaries in order to constrain the ages of the systems. Ages are needed to constrain the masses of the low mass companions, and determine whether they are low mass stars or brown dwarfs. Only a small fraction of ultracool dwarfs are found as companions to main sequence stars. The 10 new systems targeted here will become benchmark sources with well-determined fundamental properties such as mass, age, and distance. X-ray luminosities of the primaries will allow us to constrain the ages. The properties of the low mass secondaries will provide vital information for models of brown dwarf and low mass star formation, atmospheres, and evolution.
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