Mathematics – Logic
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.0807v&link_type=abstract
American Astronomical Society, AAS Meeting #212, #8.07; Bulletin of the American Astronomical Society, Vol. 40, p.200
Mathematics
Logic
Scientific paper
Recent technological advances have sparked an exciting study of the chemistry in star forming regions. By combining Spitzer IRS and ground based observations, a more sensitive diagnostic of the composition of material surrounding Young Stellar Objects (YSOs) can be performed. Initial studies of the material around YSOs show significant differences in the composition of volatiles in regions with massive YSOs compared to regions containing low mass YSOs. Pontoppidan (2006) found that CO2 and CO abundances were enhanced toward the center of the cold Ophiuchus-F core, and recent results for the CO2 ice feature at 15.3 μm also imply spatial variations within regions of star formation. Analysis of short-lived radioisotopes in meteorites indicates our solar system was seeded with material from a nearby supernova, suggesting our system formed in a region of both high and low mass star formation (Goswami & Vanhala 2000). Here we present preliminary results from data taken with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope and SpeX at the Infrared Telescope Facility (IRTF) located on Mauna Kea, HI. Observations of H2O ice, CO ice, and CO2 ice at 3.0 μm, 4.67 μm, and 15.3 μm, respectively, are presented for the Taurus and ρ Ophiuchi star forming regions. We measured abundances and used laboratory spectra to constrain the polar/apolar composition and the thermal history of the region. In the future, additional YSOs in the Taurus and ρ Ophiuchi regions will be similarly analyzed in order to correlate variations in the volatile composition of the material surrounding YSOs with environmental factors and evolutionary states.
Gibb Erika Lynne
Pastorius M. L.
Shenoy Sachindev S.
Van Brunt Kari A.
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