The first brown dwarf with a disk in Chamaeleon II

Details The first brown dwarf with a disk in Chamaeleon II The first brown dwarf with a disk in Chamaeleon II

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...453l...1a&link_type=abstract

Astronomy and Astrophysics, Volume 453, Issue 1, July I 2006, pp.L1-L4

Astronomy and Astrophysics

Astrophysics

11

Stars: Low-Mass, Brown Dwarfs, Stars: Formation, Stars: Pre-Main Sequence, Stars: Individual Objects: Iso-Cha Ii 13

Scientific paper

In this letter we characterize the candidates for young stars and brown dwarfs detected in a survey with ISOCAM in the Chamaeleon II dark cloud. Photometric data coming from a wide-field optical imaging survey, combined with IR measurements from the 2MASS catalogue and from the Spitzer satellite, allow us to study the nature of the candidates. Using intermediate-band filters we can provide a first estimate of the temperatures for objects cooler than about 3800 K. On the basis of spectroscopic and photometric data, we confirm that ISO-CHA II 13 is a young substellar object with a mass of about 0.05~M&sun;. It is thus the first object in Cha II whose substellar nature has been spectroscopically confirmed. By having a temperature of about 2880 K and displaying a substantial infrared excess, it joins the list of young brown dwarfs observed to have a surrounding disk.

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