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The Galactic center: not an active galactic nucleus

Published online by Cambridge University Press:  22 May 2014

Deokkeun An ,
Solange V. Ramírez  and
Kris Sellgren
Deokkeun An
Affiliation:
Dept. of Science Education, Ewha Womans University, Seoul 120-750, Republic of Korea email: [email protected]
Solange V. Ramírez
Affiliation:
NASA Exoplanet Science Institute, California Institute of Technology, Mail Stop 100-22, Pasadena, CA 91125, USA
Kris Sellgren
Affiliation:
Dept. of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
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Abstract

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We present 10 μm – 35μm Spitzer spectra of the interstellar medium in the central molecular zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby Galaxies Survey to our data. Previous work shows that forbidden line ratios can distinguish star-forming galaxies from low-ionization nuclear emission-line regions (LINERs) and active galactic nuclei (AGNs). Our GC line ratios agree with star-forming galaxies and not with LINERs or AGNs.

Keywords

galaxies: activegalaxies: ISMgalaxies: nucleigalaxies: starburstinfrared: ISMISM: moleculesstars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 54 - 58
Copyright
Copyright © International Astronomical Union 2014 

References

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