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Fermi Gamma-Ray Imaging of a Radio Galaxy
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2010 (English)In: Science, ISSN 0036-8075, Vol. 328, no 5979, 725-729 p.Article in journal (Refereed) Published
Abstract [en]

The Fermi Gamma-ray Space Telescope has detected the gamma-ray glow emanating from the giant radio lobes of the radio galaxy Centaurus A. The resolved gamma-ray image shows the lobes clearly separated from the central active source. In contrast to all other active galaxies detected so far in high-energy gamma-rays, the lobe flux constitutes a considerable portion (greater than one-half) of the total source emission. The gamma-ray emission from the lobes is interpreted as inverse Compton-scattered relic radiation from the cosmic microwave background, with additional contribution at higher energies from the infrared-to-optical extragalactic background light. These measurements provide gamma-ray constraints on the magnetic field and particle energy content in radio galaxy lobes, as well as a promising method to probe the cosmic relic photon fields.

Place, publisher, year, edition, pages
2010. Vol. 328, no 5979, 725-729 p.
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Engineering and Technology
URN: urn:nbn:se:kth:diva-27921DOI: 10.1126/science.1184656ISI: 000277357100032ScopusID: 2-s2.0-77952189844OAI: diva2:382782
QC 20110103Available from: 2011-01-03 Created: 2011-01-03 Last updated: 2011-01-03Bibliographically approved

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Ryde, FelixYlinen, Tomi
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