Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс: http://elar.urfu.ru/handle/10995/101680
Название: NH3 observations of the S235 star-forming region: Dense gas in inter-core bridges
Авторы: Burns, R. A.
Handa, T.
Omodaka, T.
Sobolev, A. M.
Kirsanova, M. S.
Nagayama, T.
Chibueze, J. O.
Kohno, M.
Nakano, M.
Sunada, K.
Ladeyschikov, D. A.
Дата публикации: 2019
Издатель: Oxford University Press
Библиографическое описание: NH3 observations of the S235 star-forming region: Dense gas in inter-core bridges / R. A. Burns, T. Handa, T. Omodaka, et al. — DOI 10.1093/pasj/psz074 // Publications of the Astronomical Society of Japan. — 2019. — Vol. 71. — Iss. 5. — 91.
Аннотация: Star formation is thought to be driven by two groups of mechanisms; spontaneous collapse and triggered collapse. Triggered star formation mechanisms further diverge into cloud-cloud collision (CCC), "collect and collapse" (C&C) and shock-induced collapse of pre-existing, gravitationally stable cores, or "radiation driven implosion" (RDI). To evaluate the contributions of these mechanisms and establish whether these processes can occur together within the same star-forming region, we performed mapping observations of radio-frequency ammonia and water maser emission lines in the S235 massive star-forming region. Via spectral analyses of main, hyperfine, and multi-transitional ammonia lines we explored the distribution of temperature and column density in the dense gas in the S235 and S235AB star-forming region. The most remarkable result of the mapping observations is the discovery of high-density gas in inter-core bridges which physically link dense molecular cores that house young proto-stellar clusters. The presence of dense gas implies the potential for future star formation within the system of cores and gas bridges. Cluster formation implies collapse, and the continuous physical links, also seen in re-imaged archival CS and 13CO maps, suggest a common origin to the molecular cores housing these clusters, i.e a structure condensed from a single, larger parent cloud, brought about by the influence of a local expanding H, ii region. An ammonia absorption feature co-locating with the center of the extended H, ii region may be attributed to an older gas component left over from the period prior to formation of the H, ii region. Our observations also detail known and new sites of water maser emission, highlighting regions of active ongoing star formation. © 2019 The Author(s). Published by Oxford University Press on behalf of the Astronomical Society of Japan.
Ключевые слова: ISM: MOLECULES
STARS: FORMATION
STARS: INDIVIDUAL (S235)
URI: http://elar.urfu.ru/handle/10995/101680
Условия доступа: info:eu-repo/semantics/openAccess
Идентификатор SCOPUS: 85074412533
Идентификатор PURE: 11115636
b8c9c95f-fccf-4445-9ac4-e29a82c37e61
ISSN: 46264
DOI: 10.1093/pasj/psz074
Располагается в коллекциях:Научные публикации, проиндексированные в SCOPUS и WoS CC

Файлы этого ресурса:
Файл Описание РазмерФормат 
2-s2.0-85074412533.pdf1,52 MBAdobe PDFПросмотреть/Открыть


Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.