Size dependence of the radio-luminosity-mechanical-power correlation in radio galaxies
dc.contributor.author | Shabala, S. | |
dc.contributor.author | Godfrey, L. | |
dc.date.accessioned | 2017-01-30T11:04:18Z | |
dc.date.available | 2017-01-30T11:04:18Z | |
dc.date.created | 2013-11-05T20:00:33Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Shabala, S.S. and Godfrey, L.E.H. 2013. Size dependence of the radio-luminosity-mechanical-power correlation in radio galaxies. Astrophysical Journal. 769 (2): pp. 129-135. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/8049 | |
dc.identifier.doi | 10.1088/0004-637X/769/2/129 | |
dc.description.abstract |
We examine the relationship between source radio luminosity and kinetic power in active galactic nucleus jets. We show that neglecting various loss processes can introduce a systematic bias in the jet powers inferred from radio luminosities for a sample of radio galaxies. This bias can be corrected for by considering source size as well as radio luminosity; effectively the source size acts as a proxy for source age. Based on a sample of Fanaroff-Riley Type II radio sources with jet powers derived from the measured hotspot parameters, we empirically determine a new expression for jet power that accounts for the source size, (Qjet/1036 W) = 1.5+1.8 −0.8(L151/1027WHz−1)0.8(1 + z)1.0(D/kpc)0.58±0.17, where D is source size and L 151 the 151 MHz radio luminosity. By comparing a flux-limited and volume-limited sample, we show that any derived radio-luminosity-jet-power relation depends sensitively on sample properties, in particular the source size distribution and the size-luminosity correlation inherent in the sample. Such bias will affect the accuracy of the kinetic luminosity function derived from lobe radio luminosities and should be treated with caution. | |
dc.publisher | Institute of Physics Publishing, Inc. | |
dc.subject | quasars: general | |
dc.subject | galaxies: jets | |
dc.subject | galaxies: active | |
dc.title | Size dependence of the radio-luminosity-mechanical-power correlation in radio galaxies | |
dc.type | Journal Article | |
dcterms.source.volume | 769 | |
dcterms.source.number | 2 | |
dcterms.source.startPage | 129 | |
dcterms.source.endPage | 135 | |
dcterms.source.issn | 0004-637X | |
dcterms.source.title | Astrophysical Journal | |
curtin.department | ||
curtin.accessStatus | Open access via publisher |