Large-scale H I in nearby radio galaxies – II. The nature of classical low-power radio sources
| dc.contributor.author | Emonts, B. H. C. | |
| dc.contributor.author | Morganti, R. | |
| dc.contributor.author | Struve, C. | |
| dc.contributor.author | Oosterloo, T. A. | |
| dc.contributor.author | Moorsel, G. van | |
| dc.contributor.author | Tadhunter, C. N. | |
| dc.contributor.author | Hulst, J. M. van der | |
| dc.contributor.author | Brogt, E. | |
| dc.contributor.author | Holt, J. | |
| dc.contributor.author | Mirabal, N. | |
| dc.date.accessioned | 2020-09-04T16:30:07Z | |
| dc.date.available | 2020-09-04T16:30:07Z | |
| dc.date.issued | 2010-07-19 | |
| dc.description.abstract | An important aspect of solving the long-standing question as to what triggers various types of active galactic nuclei (AGN) involves a thorough understanding of the overall properties and formation history of their host galaxies. This is the second in a series of papers that systematically study the large-scale properties of cold neutral hydrogen (H I) gas in nearby radio galaxies. The main goal is to investigate the importance of gas-rich galaxy mergers and interactions among radio-loud AGN. In this paper, we present results of a complete sample of classical low-power radio galaxies. We find that extended Fanaroff & Riley type-I radio sources are generally not associated with gas-rich galaxy mergers or ongoing violent interactions, but occur in early-type galaxies without large (>rsim 10⁸ M⊙) amounts of extended neutral hydrogen gas. In contrast, enormous discs/rings of H I gas (with sizes up to 190 kpc and masses up to 2 × 10¹⁰ M⊙) are detected around the host galaxies of a significant fraction of the compact radio sources in our sample. This segregation in H I mass with radio-source size likely indicates that either these compact radio sources are confined by large amounts of gas in the central region or that their fuelling is inefficient and different from the fuelling process of classical FR I radio sources. To first order, the overall H I properties of our complete sample (detection rate, mass and morphology) appear similar to those of radio-quiet early-type galaxies. If confirmed by better statistics, this would imply that low-power radio-AGN activity may be a short and recurrent phase that occurs at some point during the lifetime of many early-type galaxies. | en_US |
| dc.description.sponsorship | We would like to thank Jacqueline van Gorkom for her great help and useful discussions. Also many thanks to our referee Dhruba Saikia for valuable suggestions that improved this paper. BHCE thanks Columbia University, the Kapteyn Astronomical Institute and ASTRON for their hospitality during parts of this project and acknowledges the corresponding funding received from the University of Groningen and the Netherlands Organisation for Scientific Research – NWO (Rubicon grant 680.50.0508). The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The Westerbork Synthesis Radio Telescope is operated by the ASTRON (Netherlands Foundation for Research in Astronomy) with support from NWO. The Michigan–Dartmouth–MIT Observatory at Kitt Peak is owned and operated by a consortium of the University of Michigan, Dartmouth College, Ohio State University, Columbia University and Ohio University. The NASA/IPAC Extragalactic Database (NED) is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. | en_US |
| dc.description.uri | https://academic.oup.com/mnras/article/406/2/987/999702 | en_US |
| dc.format.extent | 20 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2dmcw-zzh5 | |
| dc.identifier.citation | B. H. C. Emonts, R. Morganti, C. Struve, T. A. Oosterloo, G. van Moorsel, C. N. Tadhunter, J. M. van der Hulst, E. Brogt, J. Holt, N. Mirabal, Large-scale H I in nearby radio galaxies – II. The nature of classical low-power radio sources, Monthly Notices of the Royal Astronomical Society, Volume 406, Issue 2, August 2010, Pages 987–1006, https://doi.org/10.1111/j.1365-2966.2010.16706.x | en_US |
| dc.identifier.uri | https://doi.org/10.1111/j.1365-2966.2010.16706.x | |
| dc.identifier.uri | http://hdl.handle.net/11603/19588 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Oxford University Press | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II) | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology (JCET) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Large-scale H I in nearby radio galaxies – II. The nature of classical low-power radio sources | en_US |
| dc.type | Text | en_US |