NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T08:16:22 PDT
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For refcode 2009MNRAS.397.1966T:
Retrieve 36 NED objects in this reference.
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NED Abstract

Copyright by Royal Astronomical Society. 2009MNRAS.397.1966T Infrared-red cores in nearby elliptical galaxies Tang, Yuping; Gu, Q.-S.; Huang, J.-S.; Wang, Y.-P. Abstract. We present the Spitzer Space Telescope Infrared Array Camera observations for a sample of local elliptical galaxies to study later stages of active galactic nucleus (AGN) activity. A sample of 36 elliptical galaxies is selected from the Palomar spectroscopic survey. We detect nuclear non-stellar infrared emission in nine of them. There is unambiguous evidence of circumnuclear dust in these nine galaxies in their optical images. We also find a remarkable correlation between the infrared excess emission and the nuclear radio/X-ray emission, suggesting that infrared excess emission is tightly related to nuclear activity. The possible origin of infrared excess emission from hot dust heated by the central AGN is supported by the spectral indices of the infrared excess emission. Key words: galaxies: active, galaxies: elliptical and lenticular, cD, galaxies: nuclei, infrared: galaxies
Retrieve 36 NED objects in this reference.
Please click here for ADS abstract

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