The galactic center: Not an active galactic nucleus
- 주제(키워드) galaxies: active , galaxies: ISM , galaxies: nuclei , galaxies: starburst , infrared: ISM , ISM: molecules , stars: formation
- 등재 SCIE, SCOPUS
- 발행기관 University of Chicago Press
- 발행년도 2013
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000095610
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/0067-0049/206/2/20
초록/요약
We present 10 μm-35 μm 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. The radial velocities and intensities of ionic lines and H 2 suggest that most of the H2 0-0 S(0) emission comes from gas along the line-of-sight, as found by previous work. 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. © 2013. The American Astronomical Society. All rights reserved.
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