Physics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..373g&link_type=abstract
Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #
Physics
Scientific paper
Low-luminosity AGNs (LLAGNs), which make up the vast majority of the AGN population, may yield important clues into the origin and evolution of nuclear activity, constituting a perfect laboratory to investigate the connection between galaxies in which the central black holes are active and those in which they are quiescent. The precence of a compact X-ray nucleus may provide evidences about their AGN nature. Chandra's excellent resolution allows an investigation of the X-ray nuclear properties of these galaxies. Low Ionization Nuclear-Emission Ragions (LINERs) have been selected from the catalogue by Carrillo et al. (1999). Data on 51 out of the initial 495 optical LINERs are found with the required signal-to-noise. The X-ray morphology has been classified attending to their nuclear compactness in the hard band (4.5-8 keV) into 2 categories: AGN-like nuclei (those with a clearly identified unresolved nuclear source) and Starburst-like nuclei (the ones without a clear nuclear source). 59% of the total sample are classified as AGNs with a median luminosity of 2.5x 1040 erg/s, which is an order of magnitude greather than for SB-like nuclei. The spectral fitting implies that most of the objects need a non-negligible contribution from a non-thermal component. Color-Color diagrams are defined which allow us to compute physical parameters to analyze the origin of the X-ray emission. This method is specially useful for galaxies with low S/N for which no spectral fitting can be performed. The presence of an AGN seems to be the most natural explanation for the origin of the power-law component. A comparative sample of Seyfert 2 objects has been compiled from Chandra archive, to look for common properties or eventual differences between both AGN populations.
Gonzalez-Martin Omaira
Jimenez-Bailon Elena
Marquez Isabel
Masegosa Josefa
No associations
LandOfFree
Evidence for the AGN nature of LINERs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evidence for the AGN nature of LINERs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for the AGN nature of LINERs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1082870