Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-15
Astron.J.133:1321-1330,2007
Astronomy and Astrophysics
Astrophysics
33 pages, 6 figures, accepted for publication by AJ
Scientific paper
10.1086/510901
We present an analysis of NICMOS photometry and low-resolution grism spectroscopy of low-mass stars and sub-stellar objects in the young star-forming region NGC 1333. Our goal is to constrain the ratio of low-mass stars to sub- stellar objects down to 20 Mjup in the cluster as well as constrain the cluster IMF down to 30 Mjup in combination with a previous survey of NGC 1333 by Wilking et al. Our survey covers 4 fields of 51.2" x 51.2", centered on brown dwarf candidates previously identified in Wilking et al. We extend previous work based on the use of a water vapor index for spectral typing to wavelengths accessible with NICMOS on the HST. Spectral types were derived for the 14 brightest objects in our fields, ranging from
Fanetti Tina
Greene Thomas P.
Greissl Julia
Meyer Michael R.
Schneider Glenn
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