CO Emission in Radio Galaxies at Low and High Redshift

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dc.creatorEvans, A. S.
dc.date1998-10-09
dc.date.accessioned2026-07-07T02:28:20Z
dc.date.available2026-07-07T02:28:20Z
dc.descriptionCO observations of 0<z<4 radio galaxies are presented. The L_CO upper limits for the high-redshift powerful radio galaxies (HzPRGs: z > 1, P_408MHz > 10^27 Watts/Hz) are consistent with no evolution in molecular gas (H_2) mass with redshift and/or radio power. Of the low-redshift powerful radio galaxies (LzPRGs: z<0.2, P_408MHz MHz > 10^23.5 W/Hz) observed, only one F-R II galaxy has been detected in CO, whereas approximately 50% of the radio-compact (FC) and F-R I galaxies have been detected. The CO and imaging data to date imply that either F-R II galaxies result from mergers of gas-poor galaxies relative to FC/F-R I galaxies, or that some FC/F-R I galaxies evolve into F-R II galaxies. In either scenario, the radio activity in powerful radio galaxies is most likely triggered by a merger event, and H_2 may be the fuel for the active galactic nucleus (AGN) in the early stages of the merger.
dc.descriptionLaTex (uses PASP conference style file), 6 pages with 2 postscript and 1 gif figures, to appear in "Highly Redshifted Radio Lines" Symposium, Oct'97 at NRAO, Green Bank, eds. C. Carilli et al., PASP Conference Series
dc.identifierhttps://arxiv.org/abs/astro-ph/9810163
dc.identifierhttp://arxiv.org/abs/astro-ph/9810163
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13079
dc.subjectAstrophysics
dc.titleCO Emission in Radio Galaxies at Low and High Redshift
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