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The Astrophysics of Star Formation Across Cosmic Time at ≳10 GHz with the Square Kilometre Array

Murphy, Eric J. and Sargent, Mark T. and Beswick, Rob J. and Dickinson, Clive and Heywood, Ian and Hunt, Leslie K. and Hyunh, Minh T. and Jarvis, Matt and Karim, Alexander and Krause, Marita and Prandoni, Isabella and Seymour, Nicholas and Schinnerer, Eva and Tabatabaei, Fatemeh S. and Wagg, Jeff (2014) The Astrophysics of Star Formation Across Cosmic Time at ≳10 GHz with the Square Kilometre Array. In: Proceedings of Advancing Astrophysics with the Square Kilometre Array. , Art. No. 085.

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In this chapter, we highlight a number of science investigations that are enabled by the inclusion of Band 5 (4.6-13.8 GHz) for SKA1-MID science operations, while focusing on the astrophysics of star formation over cosmic time. For studying the detailed astrophysics of star formation at highredshift, surveys at frequencies ≳10 GHz have the distinct advantage over traditional ~1.4 GHz surveys as they are able to yield higher angular resolution imaging while probing higher rest frame frequencies of galaxies with increasing redshift, where emission of star-forming galaxies becomes dominated by thermal (free-free) radiation. In doing so, surveys carried out at ≳10 GHz provide a robust, dust-unbiased measurement of the massive star formation rate by being highly sensitive to the number of ionizing photons that are produced. To access this powerful star formation rate diagnostic requires that Band 5 be available for SKA1-MID. We additionally present a detailed science case for frequency coverage extending up to 30 GHz during full SKA2 operations, as this allows for highly diverse science while additionally providing contiguous frequency coverage between the SKA and ALMA, which will likely be the two most powerful interferometers for the coming decades. To enable this synergy, it is crucial that the dish design of the SKA be flexible enough to include the possibility of being fit with receivers operating up to 30 GHz.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Murphy, Eric J.0000-0001-7089-7325
Sargent, Mark T.0000-0003-1033-9684
Dickinson, Clive0000-0002-0045-442X
Hunt, Leslie K.0000-0001-9162-2371
Jarvis, Matt0000-0001-7039-9078
Karim, Alexander0000-0002-8414-9579
Seymour, Nicholas0000-0003-3506-5536
Schinnerer, Eva0000-0002-3933-7677
Additional Information:© 2014 owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
Group:Infrared Processing and Analysis Center (IPAC)
Record Number:CaltechAUTHORS:20170519-140259138
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77605
Deposited By: Tony Diaz
Deposited On:19 May 2017 21:16
Last Modified:09 Mar 2020 13:19

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