Confirmation of a Young Low-mass Quadruple in Taurus

Details Confirmation of a Young Low-mass Quadruple in Taurus Confirmation of a Young Low-mass Quadruple in Taurus

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011noao.prop..102l&link_type=abstract

NOAO Proposal ID #2011A-0102

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Scientific paper

We recently discovered a planetary-mass companion (5-10 M_Jup, ρ=0.1 arcsec) to a young brown dwarf in the Taurus star- forming region through imaging with HST+WFPC2 and NIRI+ALTAIR. In the NIRI images, we serendipitously detected an additional possible substellar companion to a nearby (ρ=12 arcsec) young low-mass star. These four objects may comprise the first known quadruple system in which 3 members are substellar. If so, then its hierarchical configuration would suggest that the fragmentation of molecular cloud cores (i.e., the process that makes binary stars) can produce companions below 10 M_Jup. We propose to verify the companionship of the new candidate found with NIRI by repeating our previous NIRI observations and measuring its proper motion relative to those of the other 3 objects.

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