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Enabling the next generation of cm-wavelength studies of high-redshift molecular gas with the SKA

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posted on 2023-06-08, 19:27 authored by Jeff Wagg, Elisabete Da Cunha, Christopher L Carilli, Fabian Walter, Manuel Aravena, Ian Heywood, Jackie Hodge, Eric Murphy, Dominik Riechers, Mark Sargent, Ran Wang
The Square Kilometre Array will be a revolutionary instrument for the study of gas in the distant Universe. SKA1 will have sufficient sensitivity to detect and image atomic 21 cm HI in individual galaxies at significant cosmological distances, complementing ongoing ALMA imaging of redshifted high-J CO line emission and far-infrared interstellar medium lines such as [CII] 157.7 um. At frequencies below ~50 GHz, observations of redshifted emission from low-J transitions of CO, HCN, HCO+, HNC, H2O and CS provide insight into the kinematics and mass budget of the cold, dense star-forming gas in galaxies. In advance of ALMA band 1 deployment (35 to 52 GHz), the most sensitive facility for high-redshift studies of molecular gas operating below 50~GHz is the Karl G. Jansky Very Large Array (VLA). Here, we present an overview of the role that the SKA could play in molecular emission line studies during SKA1 and SKA2, with an emphasis on studies of the dense gas tracers directly probing regions of active star-formation.

History

Publication status

  • Published

File Version

  • Accepted version

Publisher

Dolman Scott Ltd for SKA Organisation

Volume

1

Book title

Advancing astrophysics with the square kilometre array

Place of publication

Thatcham

ISBN

9781909204706

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2015-01-08

First Compliant Deposit (FCD) Date

2016-03-22

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