Intermittent Jet Activity in the Radio Galaxy 4C29.30?

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We present radio observations at frequencies ranging from 240 to 8460 MHz of the radio galaxy 4C29.30 (J0840+2949) using the Giant Metrewave Radio Telescope (GMRT), the Very Large Array (VLA) and the Effelsberg telescope. We report the existence of weak extended emission with an angular size of {approx} 520 arcsec (639 kpc) within which a compact edge-brightened double-lobed source with a size of 29 arcsec (36 kpc) is embedded. We determine the spectrum of the inner double from 240 to 8460 MHz and show that it has a single power-law spectrum with a spectral index is {approx} 0.8. Its spectral ... continued below

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14 pages

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Jamrozy, M.; Konar, C.; Saikia, D. J.; Stawarz, L.; Mack, K. -H. & Siemiginowska, A. April 2, 2007.

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We present radio observations at frequencies ranging from 240 to 8460 MHz of the radio galaxy 4C29.30 (J0840+2949) using the Giant Metrewave Radio Telescope (GMRT), the Very Large Array (VLA) and the Effelsberg telescope. We report the existence of weak extended emission with an angular size of {approx} 520 arcsec (639 kpc) within which a compact edge-brightened double-lobed source with a size of 29 arcsec (36 kpc) is embedded. We determine the spectrum of the inner double from 240 to 8460 MHz and show that it has a single power-law spectrum with a spectral index is {approx} 0.8. Its spectral age is estimated to be 33 Myr. The extended diffuse emission has a steep spectrum with a spectral index of {approx} 1.3 and a break frequency 240 MHz. The spectral age is {approx}>200 Myr, suggesting that the extended diffuse emission is due to an earlier cycle of activity. We reanalyze archival x-ray data from Chandra and suggest that the x-ray emission from the hotspots consists of a mixture of nonthermal and thermal components, the latter being possibly due to gas which is shock heated by the jets from the host galaxy.

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14 pages

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  • Journal Name: Mon.Not.Roy.Astron.Soc.

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  • Report No.: SLAC-PUB-12427
  • Grant Number: AC02-76SF00515
  • DOI: 10.1111/j.1365-2966.2007.11782.x | External Link
  • Office of Scientific & Technical Information Report Number: 901849
  • Archival Resource Key: ark:/67531/metadc885536

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Office of Scientific & Technical Information Technical Reports

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  • April 2, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • July 26, 2017, 10:13 a.m.

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Jamrozy, M.; Konar, C.; Saikia, D. J.; Stawarz, L.; Mack, K. -H. & Siemiginowska, A. Intermittent Jet Activity in the Radio Galaxy 4C29.30?, article, April 2, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc885536/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.