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Infrared SEDs of Seyfert galaxies: Starbursts and the nature of the obscuring medium.

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posted on 2023-06-08, 08:05 authored by Jack Gallimore, David Axon, Stefi Baum, Moshe Elitzur, Martin Elvis, Christopher O'Dea, Andrew Robinson
We present the results of IRS low-resolution spectroscopy of 51 Seyfert galaxies, part of a large Spitzer observing program to determine the mid-to-far infrared spectral energy distributions of a well-defined sample of 87 nearby, 12 mu m-selected Seyferts. We find that the spectra clearly divide into groups based on their continuum shapes and spectral features. The infrared spectral types appear to be related to the Seyfert types. Some features are clearly related to a starburst contribution to the IR spectrum, while the observed power-law continuum shapes, attributed to the AGN, may be dust or non-thermal emission. Principal component analysis results suggest that the relative contribution of starburst emission is the dominant cause of variance in the spectra. We find that the Sy 2's show on average stronger starburst contributions than the Sy 1's.

History

Publication status

  • Published

Publisher

ASTRONOMICAL SOC PACIFIC, 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA

Volume

381

Pages

6.0

Presentation Type

  • paper

Event name

SECOND ANNUAL SPITZER SCIENCE CENTER CONFERENCE: INFRARED DIAGNOSTICS OF GALAXY EVOLUTION

Event location

Pasadena, CA

Event type

conference

Event date

November 2005.

ISBN

978-1-58381-325-6

Department affiliated with

  • Physics and Astronomy Publications

Notes

Book Series: ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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