Confirmation of the First Image of an Extra-Solar Planet

Details Confirmation of the First Image of an Extra-Solar Planet Confirmation of the First Image of an Extra-Solar Planet

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005msngr.120...25.&link_type=abstract

The Messenger, vol. 120, p. 25-25

Astronomy and Astrophysics

Astronomy

Scientific paper

A team of astronomers has confirmed the discovery of a giant planet, approximately five times the mass of Jupiter, that is gravitationally bound to a young brown dwarf, putting an end to a year-long discussion on the nature of this object. Last year, the team reported a faint red object in the close vicinity of a young brown dwarf (see ESO PR 23/04). The red object, now called 2M1207b, is more than 100 times fainter than the brown dwarf, 2M1207A. The spectrum of 2M1207b contains a strong signature of water molecules, confirming that it must be cold. Based on the infrared colours and the spectral data, evolutionary model calculations led to the conclusion that 2M1207b is a 5-Jupiter-mass planet. Its mass can also be estimated from a different method, which focuses on the strength of its gravitational field; this technique suggests that the mass might be even less than 5 Jupiter masses.

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