Computer Science
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50549z&link_type=abstract
Spitzer Proposal ID #50549
Computer Science
Scientific paper
We have discovered that TYC 596 145 1 is a lithium-rich, infrared excess, first-ascent red giant star. We believe that this giant star and its associated dusty disk represent a link in the evolutionary sequence of a newly identified class of stars. This class of stars is composed of old stars that engulf their short-period companions and, subsequently, go through a phase similar to the classical T Tauri phase of pre-main sequence evolution. In this proposal we request IRS time to observe TYC 596 145 1 to chart the evolution of dust particles in the massive young disks around old stars. Investigation of this giant's mid-infrared spectrum will also allow us an opportunity to probe the conditions under which organic material may form in situ in a disk environment, such as may have formed around our own young Sun. In particular, unlike organic material around young stars that may have been accreted directly from the interstellar medium during the star formation process, we can be confident that dust seen around TYC 596 145 formed directly from disk material.
Melis Carl
Rhee Joseph
Song Inseok
Zuckerman Ben
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