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Clustered Star Form...
Clustered Star Formation in the Center of NGC 253 Contributes to Driving the Ionized Nuclear Wind
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- Mills, E. A. C. (author)
- University of Kansas
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- Gorski, Mark, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Emig, K. L. (author)
- Universiteit Leiden (UL),Leiden University (UL),National Radio Astronomy Observatory
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- Bolatto, A. D. (author)
- University of Maryland,Flatiron Institute
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- Levy, R. C. (author)
- University of Maryland
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- Leroy, A. K. (author)
- Ohio State University
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- Ginsburg, A. (author)
- University of Florida
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- Henshaw, J. D. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Zschaechner, L. K. (author)
- Helsingin Yliopisto,University of Helsinki
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- Veilleux, S. (author)
- University of Maryland
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- Tanaka, K. (author)
- Keio University
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- Meier, D. S. (author)
- National Radio Astronomy Observatory Socorro,New Mexico Institute of Mining and Technology
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- Walter, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Krieger, N. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Ott, J. (author)
- National Radio Astronomy Observatory Socorro
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(creator_code:org_t)
- 2021-09-29
- 2021
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 919:2
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Abstract
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- We present new 3 mm observations of the ionized gas toward the nuclear starburst in the nearby (D similar to 3.5 Mpc) galaxy NGC 253. With ALMA, we detect emission from the H40 alpha and He40 alpha lines in the central 200 pc of this galaxy on spatial scales of similar to 4 pc. The recombination line emission primarily originates from a population of approximately a dozen embedded super star clusters in the early stages of formation. We find that emission from these clusters is characterized by electron temperatures ranging from 7000 to 10,000 K and measures an average singly ionized helium abundance Y (+) = 0.25 +/- 0.06, both of which are consistent with values measured for H ii regions in the center of the Milky Way. We also report the discovery of unusually broad line width recombination line emission originating from seven of the embedded clusters. We suggest that these clusters contribute to the launching of the large-scale hot wind observed to emanate from the central starburst. Finally, we use the measured recombination line fluxes to improve the characterization of overall embedded cluster properties, including the distribution of cluster masses and the fractional contribution of the clustered star formation to the total starburst, which we estimate is at least 50%.
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)
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- art (subject category)
- ref (subject category)
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- By the author/editor
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Mills, E. A. C.
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Gorski, Mark, 19 ...
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Emig, K. L.
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Bolatto, A. D.
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Levy, R. C.
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Leroy, A. K.
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show more...
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Ginsburg, A.
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Henshaw, J. D.
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Zschaechner, L. ...
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Veilleux, S.
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Tanaka, K.
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Meier, D. S.
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Walter, F.
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Krieger, N.
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Ott, J.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Chalmers University of Technology