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Star cluster formation in Orion A

Lim, Wanggi (author)
NASA Ames Research Center
Nakamura, Fumitaka (author)
National Astronomical Observatory of Japan
Wu, Benjamin (author)
National Astronomical Observatory of Japan
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Bisbas, Thomas G. (author)
National Observatory of Athens,Universität zu Köln,University of Cologne,Aristotelio Panepistimio Thessalonikis,Aristotle University of Thessaloniki
Tan, Jonathan, 1973 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Chambers, Edward (author)
NASA Ames Research Center
Bally, John (author)
University of Colorado at Boulder
Kong, Shuo (author)
University of Arizona
McGehee, Peregrine (author)
College of the Canyons
Lis, Dariusz C. (author)
California Institute of Technology (Caltech)
Ossenkopf-Okada, Volker (author)
Universität zu Köln,University of Cologne
Sanchez-Monge, Alvaro (author)
Universität zu Köln,University of Cologne
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 (creator_code:org_t)
2020-05-25
2021
English.
In: Publication of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 2053-051X .- 0004-6264. ; 73, s. S239-S255
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We introduce new analysis methods for studying the star cluster formation processes in Orion A, especially examining the scenario of a cloud-cloud collision. We utilize the CARMA-NRO Orion survey (CO)-C-13 (1-0) data to compare molecular gas to the properties of young stellar objects from the SDSS III IN-SYNC survey. We show that the increase of v(13CO) - v(YSO) and Sigma scatter of older YSOs can be signals of cloud-cloud collision. SOFIA-upGREAT 158 mu m [C II] archival data toward the northern part of Orion A are also compared to the (CO)-C-13 data to test whether the position and velocity offsets between the emission from these two transitions resemble those predicted by a cloud-cloud collision model. We find that the northern part of Orion A, including regions ONC-OMC-1, OMC-2, OMC-3, and OMC-4, shows qualitative agreements with the cloud-cloud collision scenario, while in one of the southern regions, NGC 1999, there is no indication of such a process in causing the birth of new stars. On the other hand, another southern cluster, L 1641 N, shows slight tendencies of cloud-cloud collision. Overall, our results support the cloud-cloud collision process as being an important mechanism for star cluster formation in Orion A.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)
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)

Keyword

ISM: clouds
stars: formation
ISM: individual objects (Orion A)

Publication and Content Type

art (subject category)
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