dc.contributor.author | Fernandes, C.A.C. | |
dc.contributor.author | Jarvis, M.J. | |
dc.contributor.author | Rawlings, S. | |
dc.contributor.author | Martinez-Sansigre, A. | |
dc.contributor.author | Hatziminaoglou, E. | |
dc.contributor.author | Lacy, M. | |
dc.contributor.author | Page, M.J. | |
dc.contributor.author | Stevens, Jason | |
dc.contributor.author | Vardoulaki, E. | |
dc.date.accessioned | 2011-08-17T15:01:06Z | |
dc.date.available | 2011-08-17T15:01:06Z | |
dc.date.issued | 2011-03 | |
dc.identifier.citation | Fernandes , C A C , Jarvis , M J , Rawlings , S , Martinez-Sansigre , A , Hatziminaoglou , E , Lacy , M , Page , M J , Stevens , J & Vardoulaki , E 2011 , ' Evidence for a maximum jet efficiency for the most powerful radio galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 411 , no. 3 , pp. 1909-1916 . https://doi.org/10.1111/j.1365-2966.2010.17820.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ORCID: /0000-0002-4010-8310/work/62747555 | |
dc.identifier.uri | http://hdl.handle.net/2299/6292 | |
dc.description | The definitive version can be found at: http://www.wiley.com/ Copyright Wiley Blackwell | |
dc.description.abstract | We use new mid-infrared (mid-IR) photometry from the Spitzer Space Telescope to study the relations between low-frequency radio luminosity density L-nu 151 (MHz), mid-IR (12 mu m rest frame) luminosity nu L-nu 12 (mu m) and optical emission-line ([O II]) luminosity L-[O II], for a complete sample of z similar to 1 radio galaxies from the 3CRR, 6CE, 6C*, 7CRS and TOOT00 surveys. The narrow redshift span of our sample (0.9 < z < 1.1) means that it is unbiased to evolutionary effects. We find evidence that these three quantities are positively correlated. The scaling between nu L-nu 12 (mu m) and L-[O II] is similar to that seen in other active galactic nuclei samples, consistent with both nu L-nu 12 (mu m) and L-[O II] tracing accretion rate. We show that the positive correlation between nu L-nu 12 (mu m) and L-nu 151 (MHz) implies that there is a genuine lack of objects with low values of nu L-nu 12 (mu m) at high values of L-nu 151 (MHz). Given that nu L-nu 12 (mu m) traces accretion rate, while L-nu 151 (MHz) traces jet power, this can be understood in terms of a minimum accretion rate being necessary to produce a given jet power. This implies that there is a maximum efficiency with which accreted energy can be chanelled into jet power and this efficiency is of the order of unity. | en |
dc.format.extent | 369067 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | galaxies : active | |
dc.subject | galaxies : jets | |
dc.subject | galaxies : nuclei | |
dc.subject | quasars : general | |
dc.subject | infrared : galaxies | |
dc.subject | radio continuum : galaxies | |
dc.title | Evidence for a maximum jet efficiency for the most powerful radio galaxies | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
dc.date.embargoedUntil | 2011-09-01 | |
rioxxterms.versionofrecord | 10.1111/j.1365-2966.2010.17820.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |