NOAO >   Observing Info >   Approved Programs >   2014B-0226

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Proposal Information for 2014B-0226


PI: John Lacy, University of Texas, lacy@astro.as.utexas.edu
Address: Astronomy, 2515 Speedway, C1400, Austin, TX, 78712-1205, US

CoI: Daniel Jaffe, University of Texas
CoI: Matthew Richter, UC Davis
CoI: Tie Liu, Peking University

Title: A Study of the NGC 7538 IRS 1 HIgh-mass Star Formation Region

Abstract: The pre-main-sequence evolution of forming OB stars and how they interact with their environments is poorly understood. We propose to study one of the prototypical high-mass star formation regions, NGC 7538 IRS 1, in mid-infrared ionic and molecular lines. We began this project in 2013B, and measured the width and flux of the HI n=7-6 line, which suggests that it is formed in an ionized accretion disk. But we were unable to make the desired observations of the surrounding molecular gas due to poor observing conditions. We now propose to observe the H2 J=4-2 line, which we expect to be in absorption, as well as CO and HI n=7-5 at 5um wavelength, to study the absorbing gas and dust surrounding this source.


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NOAO >   Observing Info >   Approved Programs >   2014B-0226

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