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Article: SiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disk

TitleSiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disk
Authors
KeywordsGalaxy: open clusters and associations: individual (Mercer et al.'s #4, #8, #13
Stephenson's #2)
Masers
Stars: mass-loss
Stars: supergiants
Issue Date2010
PublisherNihon Tenmon Gakkai. The Journal's web site is located at http://www.asj.or.jp/pasj/
Citation
Publications Of The Astronomical Society Of Japan, 2010, v. 62 n. 2, p. 391-407 How to Cite?
AbstractWe present the results of radio observations of red supergiants in a star cluster, Stephenson (1990, AJ, 99, 1867)'s #2, and of candidates for red supergiants in three star clusters, Mercer et al. (2005, ApJ, 635, 560)'s #4, #8, and #13, in the SiO and H 2O maser lines. The Stephenson's #2 cluster and nearby aggregation at the southwest contain more than 15 red supergiants. We detected one red supergiant at the center of Stephenson's #2 and three in a southwest aggregation in the SiO maser line; three out of these four were also detected in the H 2O maser line. The average radial velocity of the four detected objects is 97kms -1, giving a kinematic distance of 5.5 kpc, which locates this cluster near the base of the Scutum-Crux spiral arm. We also detected six SiO emitting objects associated with other star clusters. In addition, mapping observations in the CO J = 1-0 line toward these clusters revealed that an appreciable amount of molecular gas still remains around the Stephenson's #2 cluster in contrast to the prototypical red-supergiant cluster, Bica et al. (2003, A&A, 404,223)'s #122. This indicates that the time scale of gas expulsion differs considerably in individual clusters. © 2010. Astronomical Society of Japan.
Persistent Identifierhttp://hdl.handle.net/10722/138794
ISSN
2015 Impact Factor: 1.961
2015 SCImago Journal Rankings: 0.804
References

 

DC FieldValueLanguage
dc.contributor.authorDeguchi, Sen_HK
dc.contributor.authorNakashima, JIen_HK
dc.contributor.authorZhang, Yen_HK
dc.contributor.authorChong, SSNen_HK
dc.contributor.authorKoike, Ken_HK
dc.contributor.authorKwok, Sen_HK
dc.date.accessioned2011-09-19T03:18:44Z-
dc.date.available2011-09-19T03:18:44Z-
dc.date.issued2010en_HK
dc.identifier.citationPublications Of The Astronomical Society Of Japan, 2010, v. 62 n. 2, p. 391-407en_HK
dc.identifier.issn0004-6264en_HK
dc.identifier.urihttp://hdl.handle.net/10722/138794-
dc.description.abstractWe present the results of radio observations of red supergiants in a star cluster, Stephenson (1990, AJ, 99, 1867)'s #2, and of candidates for red supergiants in three star clusters, Mercer et al. (2005, ApJ, 635, 560)'s #4, #8, and #13, in the SiO and H 2O maser lines. The Stephenson's #2 cluster and nearby aggregation at the southwest contain more than 15 red supergiants. We detected one red supergiant at the center of Stephenson's #2 and three in a southwest aggregation in the SiO maser line; three out of these four were also detected in the H 2O maser line. The average radial velocity of the four detected objects is 97kms -1, giving a kinematic distance of 5.5 kpc, which locates this cluster near the base of the Scutum-Crux spiral arm. We also detected six SiO emitting objects associated with other star clusters. In addition, mapping observations in the CO J = 1-0 line toward these clusters revealed that an appreciable amount of molecular gas still remains around the Stephenson's #2 cluster in contrast to the prototypical red-supergiant cluster, Bica et al. (2003, A&A, 404,223)'s #122. This indicates that the time scale of gas expulsion differs considerably in individual clusters. © 2010. Astronomical Society of Japan.en_HK
dc.languageeng-
dc.publisherNihon Tenmon Gakkai. The Journal's web site is located at http://www.asj.or.jp/pasj/en_HK
dc.relation.ispartofPublications of the Astronomical Society of Japanen_HK
dc.subjectGalaxy: open clusters and associations: individual (Mercer et al.'s #4, #8, #13en_HK
dc.subjectStephenson's #2)en_HK
dc.subjectMasersen_HK
dc.subjectStars: mass-lossen_HK
dc.subjectStars: supergiantsen_HK
dc.titleSiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disken_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-6264&volume=62&issue=2&spage=391&epage=407&date=2010&atitle=SiO+and+H2O+maser+observations+of+red+supergiants+in+star+clusters+embedded+in+the+galactic+disk-
dc.identifier.emailNakashima, JI: junichi@hku.hken_HK
dc.identifier.emailZhang, Y: zhangy96@hku.hken_HK
dc.identifier.emailKwok, S: deannote@hku.hken_HK
dc.identifier.authorityNakashima, JI=rp00764en_HK
dc.identifier.authorityZhang, Y=rp00841en_HK
dc.identifier.authorityKwok, S=rp00716en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-77953338012en_HK
dc.identifier.hkuros170724-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77953338012&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume62en_HK
dc.identifier.issue2en_HK
dc.identifier.spage391en_HK
dc.identifier.epage407en_HK
dc.publisher.placeJapanen_HK
dc.identifier.scopusauthoridDeguchi, S=7006314159en_HK
dc.identifier.scopusauthoridNakashima, JI=35485342300en_HK
dc.identifier.scopusauthoridZhang, Y=23768446500en_HK
dc.identifier.scopusauthoridChong, SSN=36106789800en_HK
dc.identifier.scopusauthoridKoike, K=26028631700en_HK
dc.identifier.scopusauthoridKwok, S=22980498300en_HK

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