Computer Science
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sfet.confe..44r&link_type=abstract
"Star Formation in the Era of Three Great Observatories, meeting abstracts from the conference held July 13-15, 2005 in Cambridg
Computer Science
1
Scientific paper
The HST Treasury Program on the Orion Nebula Cluster has been completed in May 2005. It represents the largest investment of HST time (104 orbits) ever dedicated to star formation. Using ACS, WFPC2 and NIC3 in parallel we have mapped with unprecedented sensitivity (23-24 mag), dynamic range, spatial resolution, and spectral coverage (9 filters from U to H) approximately 1/6 of a square degree, nearly centered on the Trapezium stars. The survey provides the richest, most accurate and unbiased dataset of stellar photometry for pre-main-sequence objects ever made. Combined with optical and infrared spectroscopy from the ground and with the data taken by Chandra (COUP) and SPITZER, it will allow to attack key questions on star formation: PMS evolution and the calibration of pre-main-sequence evolutionary tracks, the shape and variations of the initial mass function in different environments, the mass accretion rates vs. age and environment, disk evolution and dissipation in environments dominated by hard vs. soft-UV radiation, stellar multiplicity vs. disk fraction, planetary mass companions, etc. I will give an overview of the program, of the observing strategy, of the data products and present some preliminary results.
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