NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-21 T09:31:16 PDT
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For refcode 2006A&A...453..863P:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2006A&A...453..863P The K-band properties of Seyfert 2 galaxies (Research Note) Z. Peng; Q. Gu; J. Melnick; Y. Zhao Received 8 December 2005 / Accepted 15 March 2006 Aims. It is well known that the [O III]5007 emission line and hard X-ray (2-10 keV) luminosities are good indicators of AGN activities and that the near and mid-infrared emission of AGN originates from re-radiation of dusty clouds heated by the UV/optical radiation from the accretion disk. In this paper we present a study of the near-infrared K-band (2.2 microns) properties for a sample of 65 Seyfert 2 galaxies. Methods. By using the AGN/Bulge/Disk decomposition technique, we analyzed the 2MASS -band images for Seyfert 2 galaxies in order to derive the -band magnitudes for the central engine, bulge, and disk components. Results. We find that the -band magnitudes of the central AGN component in Seyfert 2 galaxies are tightly correlated with the [O III]5007 and the hard X-ray luminosities, which suggests that the AGN K-band emission is also an excellent indicator of the nuclear activities at least for Seyfert 2 galaxies. We also confirm the good relation between the central black hole masses and bulge's K-band magnitudes for Seyfert 2s. Key words: galaxies: active, galaxies: Seyfert, infrared: galaxies, methods: statistical
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