The 300 kpc Long X-ray Jet in PKS 1127-145, z=1.18 Quasar: Constraining X-ray Emission Models

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dc.creatorSiemiginowska, Aneta
dc.creatorStawarz, Lukasz
dc.creatorCheung, C. C.
dc.creatorHarris, D. E.
dc.creatorSikora, Marek
dc.creatorAldcroft, Thomas L.
dc.creatorBechtold, Jill
dc.date2006-11-14
dc.date.accessioned2026-07-07T10:20:48Z
dc.date.available2026-07-07T10:20:48Z
dc.descriptionWe present a ~100 ksec Chandra X-ray observation and new VLA radio data of the large scale, 300 kpc long X-ray jet in PKS1127-145, a radio loud quasar at redshift z=1.18. With this deep X-ray observation we now clearly discern the complex X-ray jet morphology and see substructure within the knots. The X-ray and radio jet intensity profiles are seen to be strikingly different with the radio emission peaking strongly at the two outer knots while the X-ray emission is strongest in the inner jet region. The jet X-ray surface brightness gradually decreases by an order of magnitude going out from the core. The new X-ray data contain sufficient counts to do spectral analysis of the key jet features. The X-ray energy index of the inner jet is relatively flat with alpha_X = 0.66 +/-0.15 and steep in the outer jet with alpha_X = 1.0 +/-0.2. We discuss the constraints implied by the new data on the X-ray emission models and conclude that ``one-zone'' models fail and at least a two component model is needed to explain the jet's broad-band emission. We propose that the X-ray emission originates in the jet proper while the bulk of the radio emission comes from a surrounding jet sheath. We also consider intermittent jet activity as a possible cause of the observed jet morphology.
dc.descriptionApJ in press; 18 pages including 10 figures. All figures available at http://hea-www.harvard.edu/~aneta/PKS1127_2006/
dc.identifierhttps://arxiv.org/abs/astro-ph/0611406
dc.identifierhttp://arxiv.org/abs/astro-ph/0611406
dc.identifierAstrophys.J.657:145-158,2007
dc.identifierdoi:10.1086/510898
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174967
dc.subjectAstrophysics
dc.titleThe 300 kpc Long X-ray Jet in PKS 1127-145, z=1.18 Quasar: Constraining X-ray Emission Models
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