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A Study of Two Dwar...
A Study of Two Dwarf Irregular Galaxies with Asymmetrical Star Formation Distributions
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Hunter, Deidre A. (author)
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Gallardo, Samavarti (author)
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Zhang, Hong-Xin (author)
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- Adamo, Angela (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Cook, David O. (author)
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Oh, Se-Heon (author)
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Elmegreen, Bruce G. (author)
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Kim, Hwihyun (author)
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Kahre, Lauren (author)
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Ubeda, Leonardo (author)
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Bright, Stacey N. (author)
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Ryon, Jenna E. (author)
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Fumagalli, Michele (author)
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Sacchi, Elena (author)
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Kennicutt, R. C. (author)
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Tosi, Monica (author)
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Dale, Daniel A. (author)
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Cignoni, Michele (author)
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- Messa, Matteo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Grebel, Eva K. (author)
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Gouliermis, Dimitrios A. (author)
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Sabbi, Elena (author)
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Grasha, Kathryn (author)
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Gallagher, John S. (author)
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Calzetti, Daniela (author)
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Lee, Janice C. (author)
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(creator_code:org_t)
- 2018-02-27
- 2018
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 855:1
- Related links:
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https://boa.unimib.i...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Two dwarf irregular galaxies, DDO 187 and NGC 3738, exhibit a striking pattern of star formation: intense star formation is taking place in a large region occupying roughly half of the inner part of the optical galaxy. We use data on the H I distribution and kinematics and stellar images and colors to examine the properties of the environment in the high star formation rate (HSF) halves of the galaxies in comparison with the low star formation rate halves. We find that the pressure and gas density are higher on the HSF sides by 30%-70%. In addition we find in both galaxies that the H I velocity fields exhibit significant deviations from ordered rotation and there are large regions of high-velocity dispersion and multiple velocity components in the gas beyond the inner regions of the galaxies. The conditions in the HSF regions are likely the result of large-scale external processes affecting the internal environment of the galaxies and enabling the current star formation there.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- galaxies: dwarf
- galaxies: individual (DDO 187
- NGC 3738)
- galaxies: star formation
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Hunter, Deidre A ...
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Gallardo, Samava ...
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Zhang, Hong-Xin
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Adamo, Angela
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Cook, David O.
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Oh, Se-Heon
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show more...
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Elmegreen, Bruce ...
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Kim, Hwihyun
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Kahre, Lauren
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Ubeda, Leonardo
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Bright, Stacey N ...
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Ryon, Jenna E.
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Fumagalli, Miche ...
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Sacchi, Elena
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Kennicutt, R. C.
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Tosi, Monica
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Dale, Daniel A.
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Cignoni, Michele
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Messa, Matteo
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Grebel, Eva K.
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Gouliermis, Dimi ...
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Sabbi, Elena
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Grasha, Kathryn
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Gallagher, John ...
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Calzetti, Daniel ...
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Lee, Janice C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Stockholm University