Back to Search
Start Over
Fermi gamma-ray imaging of a radio galaxy.
- Source :
-
Science (New York, N.Y.) [Science] 2010 May 07; Vol. 328 (5979), pp. 725-9. Date of Electronic Publication: 2010 Apr 01. - Publication Year :
- 2010
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 328
- Issue :
- 5979
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 20360067
- Full Text :
- https://doi.org/10.1126/science.1184656