NOAO >   Observing Info >   Approved Programs >   2015A-0208

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Program Information for 2015A-0208


PI: Catherine A Pilachowski, Indiana U., catyp@astro.indiana.edu
Address: Astronomy Department, 727 E 3rd St, Bloomington, IN 47405 USA

CoI: Kenneth H Hinkle, NOAO
CoI: Zachary Maas, Indiana U.

Title: Last Gasp: HCl in Stellar Atmospheres with Phoenix

Abstract: We propose to obtain the abundance of chlorine or additional stars in the Milky Way's thin disk using Phoenix on the Mayall 4-m telescope. Knowledge of light element abundances helps to constrain and guide theoretical models of stellar evolution and galactic chemical evolution, as summarized by Nomoto et al. (2013). The element chlorine is thought to be produced in supernovae, but its abundance is virtually unknown in stars. The determination of the abundance of chlorine makes use of HCl molecular features at 3.8 microns. Results will be compared with known abundances of other elements to trace sources contributing to galactic chemical evolution. This is a continuation of our planned December observing with Phoenix to determine chlorine and phosphorus abundances. Since this is the final Phoenix semester on the 4m, we are concentrating on HCl for 2015A. Phosphorus can be obtained using facilities elsewhere but only Phoenix can do chlorine.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2015A):  KP-4m/PHNX -- 6n on Jun 02 - Jun 07 2015


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NOAO >   Observing Info >   Approved Programs >   2015A-0208

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