Probe of The Milky Way's Hidden Gas: First Results from SPLASH

Dawson, J.; Walsh, Andrew

doi:10.1017/S174392131600778X

Access Status

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Authors

Dawson, J.

Walsh, Andrew

Date

2016

Type

Conference Paper

Metadata

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Citation

Dawson, J. and Walsh, A. 2016. OH as a Probe of The Milky Way's Hidden Gas: First Results from SPLASH, in Jablonka, P. and Andre, P. and van der Tak, F. (eds), Proceedings of the 315th International Astronomical Union Symposium: From Interstellar Clouds to Star-Forming Galaxies : Universal Processes?, Aug 3-7 2015, Honolulu, USA: IAU.

Source Title

From interstellar clouds to star-forming galaxies: universal processes?

Source Conference

315th Symposium of the International-Astronomical-Union

DOI

10.1017/S174392131600778X

ISBN

978-1-107-13520-8

School

Curtin Institute of Radio Astronomy (Physics)

URI

http://hdl.handle.net/20.500.11937/50703

Collection

Curtin Research Publications

Abstract

SPLASH (the Southern Parkes Large-Area Survey in Hydroxyl) is a deep survey of ground-state OH absorption and emission from the Galactic Plane, as well as an unbiased search for OH masers. Key early results include the detection of a rich and complex distribution of diffuse, optically thin OH with strongly non-thermal excitation temperatures, and the detection of numerous new maser sources. The survey aims to use OH as a probe of CO-dark H2 ISM Galactic scales, with future plans including comprehensive comparisons with CO and Hi, as well as non-LTE excitation modelling of the four ground-state lines.