NOAO >   Observing Info >   Approved Programs >   2016A-0012

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Program Information for 2016A-0012


PI: Thomas Harrison, New Mexico State U., tharriso@nmsu.edu
Address: Astronomy Department, Box 30001/Department 4500, Las Cruces, NM, 88003-8001 USA

Title: Quantification of the 13^C Abundance in the Secondary Stars of Cataclysmic Variables

Abstract: The standard evolutionary paradigm for cataclysmic variables (CVs) suggest that their secondary stars should be normal, and not show any unusual abundance patterns. Modeling moderate resolution spectra of three CVs observed at Keck, we find severe deficits of carbon. The easiest way to destroy carbon is through the CNO cycle, where 12^C is transformed into 13^C. We propose to use GNIRS to observe three CVs with carbon deficits (SS Cyg, RU Peg, and AE Aqr) to measure their 13^C abundances. If 13^C is enhanced, the standard evolutionary paradigm for CVs will need revision.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2016A):  GEM-NQ/GNIRS -- 1.8hrs band 2 (GN-2016A-Q-55)


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NOAO >   Observing Info >   Approved Programs >   2016A-0012

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