Identification of Very Low Mass Brown Dwarfs in IC348

Details Identification of Very Low Mass Brown Dwarfs in IC348 Identification of Very Low Mass Brown Dwarfs in IC348

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..287d&link_type=abstract

NOAO Proposal ID #2010B-0287

Computer Science

Scientific paper

We propose to perform near-infrared low resolution spectroscopic follow-up observations with NIRI/Gemini North of 15 planetary mass brown dwarf (BD) candidates in IC 348 (300pc, 3Myr). The sample was identified from a wide-field deep photometric survey using MegaCam and WIRCam/CFHT. The proposed observations will allow us to confirm the membership of the candidates via the study of spectral youth indicators, to derive the spectral types and reddening, and assess the low mass nature of the confirmed sources by placing them in a H-R diagram. This will represent an unprecendent sample to eventually achieving a complete census of the low-mass population in IC 348, ideally suited to constrain the stellar, substellar and planet formation processes. Over the last decade, a number of large deep surveys (UKIDSS, GDPS, C2d, GOODS, PanSTARR, and more modestly the one we present here) have lead to some of the most important discoveries in the field of substellar star formation. The outcoming samples usually require follow-up time on 8m-class telescopes, without which the time, money and expertise invested in these large programs are not returned. An observatory like Gemini provides a unique opportunity to obtain these follow-up observations and achieve the final scientific goals of these surveys.

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