Volume 453, Number 1, July I 2006
|Page(s)||L1 - L4|
|Published online||09 June 2006|
Letter to the Editor
The first brown dwarf with a disk in Chamaeleon II
INAF - Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy e-mail: email@example.com
2 Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia, 78, 95123 Catania, Italy
3 INAF - Osservatorio Astrofisico di Catania, via S. Sofia, 78, 95123 Catania, Italy
4 Center for Astrophysics, Harvard
5 Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
6 INAF – IASF Roma, via fosso del cavaliere, 100, 00133 Roma, Italy
Accepted: 20 April 2006
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 . 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.
Key words: stars: low-mass, brown dwarfs / stars: formation / stars: pre-main sequence / stars: individual objects: ISO-CHA II 13
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.