Classifying Compact Radio Emission in Nearby Galaxies: a 10GHz Study of Active Galactic Nuclei, Supernovae, Anomalous Microwave Emission and Star Forming Regions

Fuente: arXiv

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Bibliographic Details
Main Authors:	Dage, Kristen C., Koch, Eric W., Tremou, Evangelia, Oh, Kwangmin, Sett, Susmita, Eibensteiner, Cosima, Linden, Sean T., Mahida, Angiraben D., Murphy, Eric J., Aldhalemi, Muhammad Ridha, Bustani, Zainab, Fawaz, Mariam Ismail, Harff, Hans J., Khalyleh, Amna, McBride, Timothy, Mason, Jesse, Preston, Anthony, Rinehart, Cortney, Vinson, Ethan, Panurach, Teresa, Plotkin, Richard M., Sandoval, Liliana Rivera
Format:	Preprint
Published:	2025
Subjects:	Astrophysics of Galaxies High Energy Astrophysical Phenomena
Online Access:	Acceder al recurso
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_version_	1866911084897632256
author	Dage, Kristen C. Koch, Eric W. Tremou, Evangelia Oh, Kwangmin Sett, Susmita Eibensteiner, Cosima Linden, Sean T. Mahida, Angiraben D. Murphy, Eric J. Aldhalemi, Muhammad Ridha Bustani, Zainab Fawaz, Mariam Ismail Harff, Hans J. Khalyleh, Amna McBride, Timothy Mason, Jesse Preston, Anthony Rinehart, Cortney Vinson, Ethan Panurach, Teresa Plotkin, Richard M. Sandoval, Liliana Rivera
author_facet	Dage, Kristen C. Koch, Eric W. Tremou, Evangelia Oh, Kwangmin Sett, Susmita Eibensteiner, Cosima Linden, Sean T. Mahida, Angiraben D. Murphy, Eric J. Aldhalemi, Muhammad Ridha Bustani, Zainab Fawaz, Mariam Ismail Harff, Hans J. Khalyleh, Amna McBride, Timothy Mason, Jesse Preston, Anthony Rinehart, Cortney Vinson, Ethan Panurach, Teresa Plotkin, Richard M. Sandoval, Liliana Rivera
contents	We present 115 compact radio point sources in three galaxies, NGC 5474, NGC 4631 and M51, taken in the most extended (A-)configuration of the Karl G. Jansky Very Large Array at 10GHz. Several of these compact radio point sources have diffuse counterparts identified in previous multi-band studies of resolved radio continuum emission. We find compact counterparts to eight star forming regions, four anomalous microwave emission candidates, and one supernova remnant (SN 2011dh). Nine of the compact radio sources match X-ray counterparts, the majority of which are background galaxies. These AGN are all within the D25 (isophotal diameter) of the host galaxy and might act as contaminants for X-ray binary population studies, highlighting the need for high-resolution multi-band imaging. This study showcases the broad number of science cases that require sensitive radio facilities, like the upcoming Square Kilometre Array and the planned next generation Very Large Array.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_23332
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Classifying Compact Radio Emission in Nearby Galaxies: a 10GHz Study of Active Galactic Nuclei, Supernovae, Anomalous Microwave Emission and Star Forming Regions Dage, Kristen C. Koch, Eric W. Tremou, Evangelia Oh, Kwangmin Sett, Susmita Eibensteiner, Cosima Linden, Sean T. Mahida, Angiraben D. Murphy, Eric J. Aldhalemi, Muhammad Ridha Bustani, Zainab Fawaz, Mariam Ismail Harff, Hans J. Khalyleh, Amna McBride, Timothy Mason, Jesse Preston, Anthony Rinehart, Cortney Vinson, Ethan Panurach, Teresa Plotkin, Richard M. Sandoval, Liliana Rivera Astrophysics of Galaxies High Energy Astrophysical Phenomena We present 115 compact radio point sources in three galaxies, NGC 5474, NGC 4631 and M51, taken in the most extended (A-)configuration of the Karl G. Jansky Very Large Array at 10GHz. Several of these compact radio point sources have diffuse counterparts identified in previous multi-band studies of resolved radio continuum emission. We find compact counterparts to eight star forming regions, four anomalous microwave emission candidates, and one supernova remnant (SN 2011dh). Nine of the compact radio sources match X-ray counterparts, the majority of which are background galaxies. These AGN are all within the D25 (isophotal diameter) of the host galaxy and might act as contaminants for X-ray binary population studies, highlighting the need for high-resolution multi-band imaging. This study showcases the broad number of science cases that require sensitive radio facilities, like the upcoming Square Kilometre Array and the planned next generation Very Large Array.
title	Classifying Compact Radio Emission in Nearby Galaxies: a 10GHz Study of Active Galactic Nuclei, Supernovae, Anomalous Microwave Emission and Star Forming Regions
topic	Astrophysics of Galaxies High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2507.23332