NICMOS Confirmation of a Young Planetary-Mass Companion

Details NICMOS Confirmation of a Young Planetary-Mass Companion NICMOS Confirmation of a Young Planetary-Mass Companion

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9845l&link_type=abstract

HST Proposal ID #9845

Physics

Optics

Hst Proposal Id #9845 Star Formation

Scientific paper

We have recently discovered a strong candidate for a planetary-mass { 10 Mjup} companion to a young Sun-like star, based on near-IR imaging and spectroscopy with the Keck and Subaru adaptive optics {AO} systems. While the ground-based data strongly suggest that the candidate has a very low effective temperature, and hence a very low mass, they are not definitive. We propose to obtain NICMOS coronagraphy to measure the companion's 1.9um water-band absorption. This feature is a distinct signature of very cool objects and is unobservable from the ground. The combined ground-based and space-based data set will dermine whether the companion has a very low temperature, and hence if it is the lowest mass companion found to date by direct imaging.

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