Journal
ASTRONOMY & ASTROPHYSICS
Volume 453, Issue 1, Pages L1-U2Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20065290
Keywords
stars : low-mass, brown dwarfs; stars : formation; stars : pre-main sequence; stars : individual objects : ISO-CHA II 13
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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-circle dot. 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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