8th HEAD Meeting, 8-11 September, 2004
Session 26 AGN/Galactic Nuclei
Poster, Friday, September 10, 2004, 9:00am-10:00pm

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[26.10] A Chandra study of the enigmatic nature of the Composite Seyfert/Star-forming galaxies

F. Panessa, A. Fruscione (Harvard-Smithsonian CfA), L. Bassani, M. Cappi, M. Dadina (IASF-CNR Bologna), R. Della Ceca, G. Trinchieri, A. Wolter (INA-OAB), S. Pellegrini, G.G.C. Palumbo (Universita' di Bologna)

New Chandra X-ray observations have offered the chance to investigate the optical/X-ray mismatch of a sample of 'Composite' Seyfert/Star-forming galaxies. The optical spectral properties of this enigmatic class of objects classify them as star-forming galaxies, however the presence an active nucleus is suggested by the detection of weak H[alpha] broad wings and by a ROSAT X-ray luminosity typical of an active nucleus. A detailed spatial, spectral and temporal analysis of the Chandra observations together with a multi-wavelength analysis suggest the presence of a low-luminosity AGN optically overwhelmed by the host galaxy light.

This work has been supported by NASA grants GO3-4131X and NAS8-39073 to the Chandra X-Ray Center.

The author(s) of this abstract have provided an email address for comments about the abstract: fpanessa@head.cfa.harvard.edu

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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.