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Characterizing circumnuclear starbursts in the local universe with the VLA

Published online by Cambridge University Press:  29 March 2021

Yiqing Song Open the ORCID record for Yiqing Song [Opens in a new window] ,
Sean T. Linden ,
Aaron S. Evans ,
Loreto Barcos-Muñoz  and
Eric J. Murphy
Yiqing Song
Affiliation:
Department of Astronomy, University of Virginia, 530 McCormick Rd, Charlottesville, VA 22904, USA email: ys7jf@virginia.edu
Sean T. Linden
Affiliation:
Department of Astronomy, University of Virginia, 530 McCormick Rd, Charlottesville, VA 22904, USA email: ys7jf@virginia.edu
Aaron S. Evans
Affiliation:
Department of Astronomy, University of Virginia, 530 McCormick Rd, Charlottesville, VA 22904, USA email: ys7jf@virginia.edu National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA
Loreto Barcos-Muñoz
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA
Eric J. Murphy
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA
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Abstract

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Nuclear rings are excellent laboratories to study star formation (SF) under extreme conditions. We compiled a sample of 9 galaxies that exhibit bright nuclear rings at 3-33 GHz radio continuum observed with the Jansky Very Large Array, of which 5 are normal star-forming galaxies and 4 are Luminous Infrared Galaxies (LIRGs). Using high frequency radio continuum as an extinction-free tracer of SF, we estimated the size and star formation rate of each nuclear ring and a total of 37 individual circumnuclear star-forming regions. Our results show that majority of the SF in the sample LIRGs take place in their nuclear rings, and circumnuclear SF in local LIRGs are much more spatially concentrated compared to those in the local normal galaxies and previously studied nuclear and extra-nuclear SF in normal galaxies at both low and high redshifts.

Keywords

radio continuum: galaxiesgalaxies: starburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 462 - 463
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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