NOAO >   Observing Info >   Approved Programs >   2016B-0066

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Program Information for 2016B-0066


PI: Luke Keller, Ithaca College, lkeller@ithaca.edu
Address: Physics Department, 953 Danby Road, Ithaca, NY 14850 USA

CoI: G C Sloan, Cornell U.

Title: Near infrared study of gas emission from proto-planetary disks in the Small Magellanic Cloud

Abstract: We propose a short run of preliminary observations to demonstrate feasibility for a larger, comprehensive near infrared (NIR) spectroscopic study of young stars in the Small Magellanic Cloud (SMC). These objects have all the characteristics of intermediate-mass pre-main- sequence stars with proto-planetary disks ({it e.g.} Herbig Ae/Be or intermediate-mass T Tauri stars) including: unobscured stars with strong H$alpha$ emission located near star forming regions, significant near- and mid-infrared excess emission, and mid-iR emission from polycyclic aromatic hydrocarbons (PAH). Since the SMC is metal-poor relative to the Milky Way galaxy, this sample affords us an opportunity to characterize proto-planetary disks in an environment that is chemically similar to galaxies in the early universe. We propose to use ARCoIRIS on the Blanco telescope in a pilot study to gather near infrared spectra of two of our sources. We will test our hypothesis that the disks are emitting strong gas features such as Brackett $gamma$ and CO ro- vibrational bands in the K-band. If present, these features will allow us to estimate the accretion activity (Br$gamma$) and constrain gas dynamics and structure (CO bands) of these extra-galactic proto- planetary disks.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2016B):  CT-4m/ARCoIRIS -- 1n on Nov 12 2016


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