The Case of the 300 kpc Long X-ray Jet in PKS 1127-145 at z=1.18

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dc.creatorSiemiginowska, Aneta
dc.creatorHarris, D. E.
dc.creatorAldcroft, Thomas L.
dc.creatorStawarz, Lukasz
dc.creatorCheung, C. C.
dc.creatorSikora, Marek
dc.creatorBechtold, Jill
dc.date2007-08-09
dc.date.accessioned2026-07-07T08:22:57Z
dc.date.available2026-07-07T08:22:57Z
dc.descriptionThe complex X-ray morphology of the 300 kpc long X-ray jet in PKS1127-145 (z=1.18 quasar) is clearly discerned in a ~100 ksec Chandra observation. The jet X-ray surface brightness gradually decreases by an order of magnitude going out from the core. The X-ray spectrum 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. The X-ray and radio jet intensity profiles are 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. We discuss the constraints implied by these data on the X-ray emission models and conclude that ``one-zone'' models fail and that at least a two-component model is needed to explain the jet's broadband 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.description5 pages, 5 figures. To be published in the proceedings of "Extragalactic Jets: Theory and Observation from Radio to Gamma Ray" ASP Conference Series, T. A. Rector and D. S. De Young (eds.)
dc.identifierhttps://arxiv.org/abs/0708.1312
dc.identifierhttp://arxiv.org/abs/0708.1312
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/135826
dc.subjectAstrophysics
dc.titleThe Case of the 300 kpc Long X-ray Jet in PKS 1127-145 at z=1.18
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