MODELING X–RAY EMISSION OF A STRAIGHT JET: PKS 0920-397

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dc.contributor.authorSCHWARTZ, D. A.
dc.contributor.authorMASSARO, F.
dc.contributor.authorSIEMIGINOWSKA, A.
dc.contributor.authorWORRALL, D. M.
dc.contributor.authorBIRKINSHAW, M.
dc.contributor.authorMARSHALL, H.
dc.contributor.authorEVANS, D.
dc.contributor.authorPERLMAN, E.
dc.contributor.authorGELBORD, J. M.
dc.contributor.authorLOVELL, J. E. J.
dc.contributor.authorGODFREY, L.
dc.contributor.authorBICKNELL, G.
dc.contributor.authorOJHA, R.
dc.contributor.authorHARDCASTLE, M.
dc.contributor.authorJESTER, S.
dc.contributor.authorJORSTAD, S.
dc.contributor.authorSTAWARZ, L.
dc.date.accessioned2020-04-17T14:40:00Z
dc.date.available2020-04-17T14:40:00Z
dc.date.issued2012-01
dc.description.abstractWe summarize a study of PKS 0920-397 using our 42 ks Chandra observation in conjunction with our ATCA 20GHz image, and HST/ACS F814W and F475W images. We investigate the hypothesis that the jet X–ray emission is due to inverse-Compton (IC) scattering on the cosmic microwave background (CMB) from the same population of relativistic electrons that give rise to the radio emission. To calculate parameters intrinsic to the source, one must finesse the fact that we do not know the true angle of the jet to our line of sight. Typical assumptions are that the Doppler factor equals the bulk Lorentz factor, or that the Lorentz factor takes some fixed numerical value. While giving useful estimates, neither assumption can be exact in general. We try different constraints to determine the jet quantities. It is plausible that the kinetic flux is constant along the jet, prior to a terminal hotspot or lobe, and with minimal bending of the jet. Alternatively, because PKS 0920-397 appears straight in projection on the sky, we might assume the jet maintains a constant angle to our line of sight. Either approach gives bulk Lorentz factors of 6 to 8, with kinetic energy flux of order 10⁴⁶ erg s⁻¹, and with the jet at an angle 2° to 4° from our line of sight.en_US
dc.description.sponsorshipThis work was supported by NASA contract NAS8-03060 and SAO grants GO9-0121B and GO7-8107X. F. Massaro acknowledges a grant from the Foundation BLANCEFLOR Boncompagni-Ludovisi, n’ee Bildt.en_US
dc.description.urihttps://www.worldscientific.com/doi/abs/10.1142/S0218271810017147en_US
dc.format.extent8 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2nly4-2ktg
dc.identifier.citationSchwartz, Dan and Massaro, Francesco and A.siemiginowska, and M.worrall, D. and M.birkinshaw, and H.marshall, and D.evans, and Perlman, Eric and M.gelbord, J. and J.lovell, J. and Godfrey, L. and G.bicknell, and Ojha, Rajendra and Hardcastle, Martin and Jester, Sebastian and Jorstad, Svetlana and L.stawarz, MODELING X–RAY EMISSION OF A STRAIGHT JET: PKS 0920-397, Vol 19, International Journal of Modern Physics D, 10.1142/S0218271810017147en_US
dc.identifier.uri10.1142/S0218271810017147
dc.identifier.urihttp://hdl.handle.net/11603/18083
dc.identifier.urihttps://archive.stsci.edu/mastbibref.php?bibcode=2010IJMPD..19..879S
dc.identifier.urihttps://ui.adsabs.harvard.edu/link_gateway/2010IJMPD..19..879S/ESA
dc.language.isoen_USen_US
dc.publisherWorld Scientificen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.rightsThis 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.rightsPublic Domain Mark 1.0*
dc.rightsThis 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.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleMODELING X–RAY EMISSION OF A STRAIGHT JET: PKS 0920-397en_US
dc.typeTexten_US

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