NOAO >   Observing Info >   Approved Programs >   2010B-0287

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Proposal Information for 2010B-0287


PI: Gaspard Duchene, UC Berkeley (Astronomy), gduchene@berkeley.edu
Address: Department of Astronomy, 601 Campbell Hall #3411, Berkeley, CA, 94720-3411, USA

CoI: Catarina Alves de Oliveira, Laboratoire d'Astrophysique de Grenoble
CoI: Estelle Moraux, Laboratoire d'Astrophysique de Grenoble
CoI: Jerome Bouvier, Laboratoire d'Astrophysique de Grenoble
CoI: Herve Bouy, European Space Astronomy Centre (ESA)

Title: Identification of Very Low Mass Brown Dwarfs in IC348

Abstract: 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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