NOAO >   Observing Info >   Approved Programs >   2016A-0282

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Program Information for 2016A-0282


PI: Jeffrey S Bary, Colgate U., jbary@colgate.edu
Address: 13 DRIVE, HAMILTON, NY 13346 United States

CoI: Michael Petersen, U. Mass

Title: High-Resolution Spectroscopy of Orbitally-Modulated Accretion Activity in Pre-Main Sequence Binaries

Abstract: We propose to study the interactions of circumstellar and circumbinary material in the young, tight binary system: AK Sco. using Phoenix on Gemini South. The highly elliptical orbits of the stellar companions in the AK Sco binary produce orbitally-modulated accretion activity with "periodic" flares occuring at periastron passages. The predictable nature of the accretion activity and flares provides a unique laboratory for studying accretion-related phenommena such as accretion flows, stellar winds, and outflows/jets. At high spectral resolution, we will probe two well-known indicators of infalling and outflowing gas, PaB and HeI, and observe the evolution of the feature morphologies including shapes, kinematics, and strengths as the system undergoes an accretion outburst.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2016A):  GEM-S-SVC/PHNX -- 11hrs band 1 (GS-2016A-Q-41)


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2016A-0282

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