Extrasolar Giant Planets in the Sigma Orionis Open Cluster: a Progress Report

Details Extrasolar Giant Planets in the Sigma Orionis Open Cluster: a Progress Report Extrasolar Giant Planets in the Sigma Orionis Open Cluster: a Progress Report

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..321..193m&link_type=abstract

Extrasolar Planets: Today and Tomorrow, ASP Conference Proceedings, Vol. 321, held 30 June - 4 July 2003, Institut D'Astrophysiq

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We report on our ongoing efforts to probe for extrasolar giant planets in the Sigma Orionis open cluster. With an age of about 3 Myr, a distance of about 440 pc and very low reddening, this cluster provides a privileged hunting ground for brown dwarfs and superplanets. Several L dwarfs and one T dwarf have been identified in the cluster. Assuming cluster membership, their masses, estimated from evolutionary models, range from 15 to 3 Jupiter masses. These objects appear to be numerous, indicating that superplanets could be more abundant free floating in interstellar space than in orbits around normal stars.

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