Radio continuum spectra of galaxies in the Virgo cluster region

Astron.Astrophys. 418 (2004) 1-6 New radio continuum observations of galaxies in the Virgo cluster region at 4.85, 8.6, and 10.55 GHz are presented. These observations are combined with existing measurements at 1.4 and 0.325 GHz. The sample includes 81 galaxies were spectra with more than two freque...

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Bibliographic Details
Main Authors Vollmer, B, Thierbach, M, Wielebinski, R
Format Journal Article
LanguageEnglish
Published 08.01.2004
Subjects
Physics - Astrophysics of Galaxies
Physics - Cosmology and Nongalactic Astrophysics
Physics - Earth and Planetary Astrophysics
Physics - High Energy Astrophysical Phenomena
Physics - Instrumentation and Methods for Astrophysics
Physics - Solar and Stellar Astrophysics
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Summary:Astron.Astrophys. 418 (2004) 1-6 New radio continuum observations of galaxies in the Virgo cluster region at 4.85, 8.6, and 10.55 GHz are presented. These observations are combined with existing measurements at 1.4 and 0.325 GHz. The sample includes 81 galaxies were spectra with more than two frequencies could be derived. Galaxies that show a radio-FIR excess exhibit central activity (HII, LINER, AGN). The four Virgo galaxies with the highest absolute radio excess are found within 2 degrees of the center of the cluster. Galaxies showing flat radio spectra also host active centers. There is no clear trend between the spectral index and the galaxy's distance to the cluster center.
DOI:10.48550/arxiv.astro-ph/0401104