X-ray properties of the "Composite" Seyfert/Star-forming galaxies
Abstract
An enigmatic, small class of IR and X-ray luminous sources, named ``Composite'' starburst/Seyfert galaxies, has been defined from IRAS and RASS data. The objects have optical spectra dominated by the features of HII galaxies (plus, in some cases, weak Seyfert signatures) but X-ray luminosities higher than expected from starbursts and more typical of Seyfert nuclei. The true nature of this class of objects is still unknown. We present Chandra data of four of these galaxies that were obtained to investigate the nature of the X-ray source. The X-ray spectrum, the lack of any significant extended component, and the observed variability indicate that the AGN is the dominant component in the X-ray domain.
Keywords
Cite
@article{arxiv.astro-ph/0407585,
title = {X-ray properties of the "Composite" Seyfert/Star-forming galaxies},
author = {A. Wolter and G. Trinchieri and R. Della Ceca and F. Panessa and M. Dadina and L. Bassani and M. Cappi and A. Fruscione and S. Pellegrini and G. Palumbo},
journal= {arXiv preprint arXiv:astro-ph/0407585},
year = {2007}
}
Comments
4 pages; 3 figure; proceedings of XLVIII Congresso della Societa' Astronomica Italiana, Milano, Italy 19-23 april 2004, to be published on MemSAIt; Eds. A. Wolter; G. Israel; F. Bacciotti