Using Hst-wfc3 Photometry To Classify Brown Dwarfs In The Field Of Ngc3603

Details Using Hst-wfc3 Photometry To Classify Brown Dwarfs In The Field Of Ngc3603 Using Hst-wfc3 Photometry To Classify Brown Dwarfs In The Field Of Ngc3603

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546338s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #463.38; Bulletin of the American Astronomical Society, Vol. 36, p.1117

Astronomy and Astrophysics

Astronomy

Scientific paper

The origin of brown dwarfs (BDs) is an important component of the theory of star formation that still remains somewhat mysterious. The new Wide Field Camera 3 (WFC3) on board the HST is optimized at both UV and IR wavelengths and offers an unique opportunity for a
major advancement in this field. In this contribution we show the possibilities offered by the WFC3 panchromatic capabilities for the identification and characterization of BDs. We use a set of
four WFC3 narrow and medium-band filters, spanning the J and H band, to identify H2O molecular features unique to BDs. We created a model of predicted colour-colour values for different spectral types by integrating the filter pass-bands with simulated spectra of stars and BDs and validated the model using actual spectra of field BDs. We apply this BD identification technique to WFC3 observations of the NGC3603 cluster and associated HII region.
This paper is based on Early Release Science observations made by the WFC3 Scientific Oversight Committee. We are grateful to the Director of the Space Telescope Science Institute for awarding
Director's Discretionary time for this programme.

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