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SWAG: Survey of Water and Ammonia in the Galactic Center

Published online by Cambridge University Press:  09 February 2017

Jürgen Ott
Affiliation:
National Radio Astronomy Observatory, Socorro, NM, USA, email: [email protected]
David S. Meier
Affiliation:
New Mexico Institute of Mining and Technology, Socorro, NM, USA
Nico Krieger
Affiliation:
Max-Planck-Institut für Astronomie, Heidelberg, Germany
Matthew Rickert
Affiliation:
Northwestern University, Evanston, IL, USA
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Abstract

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SWAG (“Survey of Water and Ammonia in the Galactic Center”) is a multi-line interferometric survey toward the Center of the Milky Way conducted with the Australia Telescope Compact Array. The survey region spans the entire ~400 pc Central Molecular Zone and comprises ~42 spectral lines at pc spatial and sub-km/s spectral resolution. In addition, we deeply map continuum intensity, spectral index, and polarization at the frequencies where synchrotron, free-free, and thermal dust sources emit. The observed spectral lines include many transitions of ammonia, which we use to construct maps of molecular gas temperature, opacity and gas formation temperature (see poster by Nico Krieger et al., this volume). Water masers pinpoint the sites of active star formation and other lines are good tracers for density, radiation field, shocks, and ionization. This extremely rich survey forms a perfect basis to construct maps of the physical parameters of the gas in this extreme environment.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2017