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| Paper: |
Chandra Snapshot Observations of Low-Luminosity AGN with a Compact Radio Source |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
403 |
| Authors: |
Terashima, Y.; Wilson, A. S. |
| Abstract: |
We present the results of Chandra snapshot observations of LINERs (Low-Ionization Nuclear Emission-line Regions) and low-luminosity Seyfert galaxies. Our sample consists of all the objects with a flat or inverted spectrum compact radio core in the VLA survey of low-luminosity AGN (LLAGN) candidates by Nagar et al. (2000). An X-ray nucleus is detected from all objects except one and their X-ray luminosities are in the range 5e38 to 8e41 ergs/s. X-ray to Hα luminosity ratios of most objects are in good agreement with the correlation known for LLAGNs and more luminous AGNs, and indicate that their optical emission lines are predominantly powered by a LLAGN. A few objects are fainter in X-rays than the correlation. Comparing with multi-wavelengths results, we find that these objects are most likely to be heavily obscured AGN. We show at least a part of type 2 LINERs are a low-luminosity counter part of an obecured AGN which are often observed in Seyfert 2s galaxies. We compare the radio to X-ray spectral slope of LLAGNs with those of more-luminous AGNs, and confirm the suggestion based on optical studies that a large fraction of LLAGNs are radio loud. |
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