Biology
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.0509y&link_type=abstract
American Astronomical Society, DPS meeting #42, #5.09; Bulletin of the American Astronomical Society, Vol. 42, p.951
Biology
Scientific paper
The Quasi-Hilda comet P/2010 H2 (Vales) underwent a remarkable outburst on UT April 16, 2010. The brightness of this object increased by a factor of 1000 in less than 15 hours. Near-infrared (0.8 to 2.5 micron) spectroscopy of this new comet was performed using the 3.0-m NASA Infrared Telescope Facility atop Mauna Kea on UT April 20 and 22, 2010. Two broad absorption bands were detected in the reflectance spectra of Vales, centered at 1.5 and 2.0 micron at depths of 4% and 8% of the continuum, respectively. These features, which were detected on the both nights, are consistent with abundant water ice grains in the central coma. Moreover, a narrow absorption feature was observed at 1.65 micron, indicating the presence of crystalline ice. We will present the NIR spectra of comet Vales and the best-fit synthetic models. We will also discuss a dynamical analysis which constrains the lifetime and the likely source regions of this new outburst comet. This was supported by the National Aeronautics and Space Administration through the NASA Astrobiology Institute under Cooperative Agreement No. NNA08DA77A issued through the Office of Space Science.
Sarid Gal
Yang Bin
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