Fermi Gamma-Ray Imaging of a Radio Galaxy
2010 (English)In: Science, ISSN 0036-8075, Vol. 328, no 5979, 725-729 p.Article in journal (Refereed) Published
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.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-27921DOI: 10.1126/science.1184656ISI: 000277357100032ScopusID: 2-s2.0-77952189844OAI: oai:DiVA.org:kth-27921DiVA: diva2:382782
QC 201101032011-01-032011-01-032011-01-03Bibliographically approved