An Infrared Study of the Large-Scale Jet in Quasar PKS 1136-135

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We present Spitzer IRAC imaging of the large-scale jet in the quasar PKS 1136-135 at wavelengths of 3.6 and 5.8 {micro}m, combined with previous VLA, HST, and Chandra observations. We clearly detect infrared emission from the jet, resulting in the most detailed multifrequency data among the jets in lobe-dominated quasars. The spectral energy distributions of the jet knots have significant variations along the jet, like the archetypal jet in 3C 273. The infrared measurements with IRAC are consistent with the previous idea that the jet has two spectral components, namely (1) the low-energy synchrotron spectrum extending from radio to infrared, ... continued below

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9 pages

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Uchiyama, Yasunobu; Urry, C.Megan; Coppi, Paolo; Van Duyne, Jeffrey; Cheung, C. C.; Sambruna, Rita M. et al. March 16, 2007.

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We present Spitzer IRAC imaging of the large-scale jet in the quasar PKS 1136-135 at wavelengths of 3.6 and 5.8 {micro}m, combined with previous VLA, HST, and Chandra observations. We clearly detect infrared emission from the jet, resulting in the most detailed multifrequency data among the jets in lobe-dominated quasars. The spectral energy distributions of the jet knots have significant variations along the jet, like the archetypal jet in 3C 273. The infrared measurements with IRAC are consistent with the previous idea that the jet has two spectral components, namely (1) the low-energy synchrotron spectrum extending from radio to infrared, and (2) the high-energy component responsible for the X-ray flux. The optical fluxes may be a mixture of the two components. We consider three radiation models for the high-energy component: inverse Compton scattering of cosmic microwave background (CMB) photons by radio-emitting electrons in a highly relativistic jet, synchrotron radiation by a second distinct electron population, and synchrotron radiation by ultra high energy protons. Each hypothesis leads to important insights into and constraints on particle acceleration in the jet, as well as the basic physical properties of the jet such as bulk velocity, transporting power, and particle contents.

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9 pages

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  • Journal Name: Submitted to Astrophys.J.

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  • Report No.: SLAC-PUB-12397
  • Grant Number: AC02-76SF00515
  • DOI: 10.1086/518089 | External Link
  • Office of Scientific & Technical Information Report Number: 900987
  • Archival Resource Key: ark:/67531/metadc885477

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  • March 16, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 9:13 p.m.

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Uchiyama, Yasunobu; Urry, C.Megan; Coppi, Paolo; Van Duyne, Jeffrey; Cheung, C. C.; Sambruna, Rita M. et al. An Infrared Study of the Large-Scale Jet in Quasar PKS 1136-135, article, March 16, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc885477/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.