Multi-wavelength Behaviour of III Zw2
Abstract
III Zw2 was observed with XMM-Newton in July 2000. Its X-ray spectrum can be described by a power law of photon index Γ~1.7 with a Gaussian line at 6.7KeV. There is no significant evidence of intrinsic absorption within the source or of a soft X-ray excess. Multi-wavelength light curves over a period of 25 years show related variations from the radio to X-rays. We interpret the radio to optical emission as synchrotron radiation, self-absorbed in the radio/millimetre region, and the X-rays as mainly due to Compton up-scattering of low energy photons by the population of high energy electrons that give rise to the synchrotron radiation.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 2002
- DOI:
- 10.1071/AS01093
- arXiv:
- arXiv:astro-ph/0201545
- Bibcode:
- 2002PASA...19...73S
- Keywords:
-
- accretion;
- accretion disks;
- galaxies: individual (III Zw2);
- galaxies: active;
- galaxies: Seyfert;
- radio continumm: galaxies;
- X-rays: galaxies;
- Astrophysics
- E-Print:
- 5 pages, 3 figures. Accepted for publication in PASA