Search: WFRF:(Imanishi Masatoshi) >
AGN X-Ray Irradiati...
AGN X-Ray Irradiation of CO Gas in NGC 2110 Revealed by Chandra and ALMA
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- Kawamuro, Taiki (author)
- National Astronomical Observatory of Japan
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- Izumi, Takuma (author)
- National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI)
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- Onishi, Kyoko, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Imanishi, Masatoshi (author)
- National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI)
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- Nguyen, Dieu D. (author)
- National Astronomical Observatory of Japan
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- Baba, Shunsuke (author)
- National Astronomical Observatory of Japan
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(creator_code:org_t)
- 2020-06-04
- 2020
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 895:2
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https://iopscience.i...
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https://doi.org/10.3...
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Abstract
Subject headings
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- We report spatial distributions of the Fe-K alpha line at 6.4 keV and the CO(J = 2-1) line at 230.538 GHz in NGC 2110, which are, respectively, revealed by Chandra and Atacama Large Millimeter/submillimeter Array (ALMA) at 05. A Chandra 6.2-6.5 keV to 3.0-6.0 keV image suggests that the Fe-K alpha emission extends preferentially in a northwest to southeast direction out to 3 '', or similar to 500 pc, on each side. Spatially resolved spectral analyses support this by finding significant Fe-K alpha emission lines only in the northwest and southeast regions. Moreover, their equivalent widths are found to be similar to 1.5 keV, indicative for the fluorescence by nuclear X-ray irradiation as the physical origin. By contrast, CO(J = 2-1) emission is weak therein. For quantitative discussion, we derive ionization parameters by following an X-ray dominated region (XDR) model. We then find them high enough to interpret the weakness as the result of X-ray dissociation of CO and/or H-2. Another possibility also remains that CO molecules follow a superthermal distribution, resulting in brighter emission in higher-J lines. Further follow-up observations are encouraged to draw a conclusion on what predominantly changes the interstellar matter properties and whether the X-ray irradiation eventually affects the surrounding star formation as active galactic nucleus (AGN) feedback.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Molecular gas
- AGN host galaxies
- Star formation
- X-ray active galactic nuclei
- Radio astronomy
- Submillimeter astronomy
- X-ray astronomy
- Astrophysical black holes
- Active galactic nuclei
Publication and Content Type
- art (subject category)
- ref (subject category)
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