Physics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..323m&link_type=abstract
NOAO Proposal ID #2008B-0323
Physics
Scientific paper
We proposed moderate resolution 2-4.2 (micron) spectroscopy with NIRI of Spitzer identified protostars in the Orion molecular clouds. The Orion clouds contain the richest collection of protostars within 500 pc and is the premiere region for studying protostellar evolution in different environments - from crowded clusters to isolation. This study will be combined with ongoing/approved Spitzer and Herschel programs to generate 2-160 (micron) spectral energy distributions for 270 protostars, including 5-35 (micron) spectra with Spitzer and 2-4.2 (micron) spectra from ground-based telescopes. Using radiative transfer models, we will use this data to determine the fundamental protostellar properties such as gas infall rate, rotation rate, outflow cavity angle, and we will trace the flow of gas from the protostellar envelope to the central protostar. NIRI will provide information on the 3 (micron) ice feature, hydrogen lines created by accretion onto the central protostar, and photospheric features from the central protostar.
Allen Lori
Calvet Nuria
Megeath Tom
Muzerolle James
Poteet Charles
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