Discovery of the First Brown Dwarf Eclipsing Binary

Details Discovery of the First Brown Dwarf Eclipsing Binary Discovery of the First Brown Dwarf Eclipsing Binary

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20720101s&link_type=abstract

American Astronomical Society Meeting 207, #201.01; Bulletin of the American Astronomical Society, Vol. 37, p.1499

Astronomy and Astrophysics

Astronomy

Scientific paper

We have discovered a brown-dwarf eclipsing binary---the first of its kind---in the Orion Nebula Cluster. Combining multi-band photometric light curves with precise radial velocities from high-resolution infrared spectra obtained with Gemini/Phoenix, we directly measure the masses and radii of both brown dwarfs, as well as their temperatures and luminosities. These measurements, including the most accurate masses for brown dwarfs to date, are in generally good agreement with theoretical models of young brown dwarfs.
Surprisingly, the more massive brown dwarf in this system is found to be cooler than its lower-mass companion. This may indicate a younger age for the more massive brown dwarf, which would suggest that these brown dwarfs were not born together; multiple-body dynamical interactions may have been important in their formation.

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