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Article: SiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disk
Title | SiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disk |
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Authors | |
Keywords | Galaxy: open clusters and associations: individual (Mercer et al.'s #4, #8, #13 Stephenson's #2) Masers Stars: mass-loss Stars: supergiants |
Issue Date | 2010 |
Publisher | Nihon 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? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/138794 |
ISSN | 2023 Impact Factor: 2.2 2023 SCImago Journal Rankings: 0.860 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Deguchi, S | en_HK |
dc.contributor.author | Nakashima, JI | en_HK |
dc.contributor.author | Zhang, Y | en_HK |
dc.contributor.author | Chong, SSN | en_HK |
dc.contributor.author | Koike, K | en_HK |
dc.contributor.author | Kwok, S | en_HK |
dc.date.accessioned | 2011-09-19T03:18:44Z | - |
dc.date.available | 2011-09-19T03:18:44Z | - |
dc.date.issued | 2010 | en_HK |
dc.identifier.citation | Publications Of The Astronomical Society Of Japan, 2010, v. 62 n. 2, p. 391-407 | en_HK |
dc.identifier.issn | 0004-6264 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/138794 | - |
dc.description.abstract | We 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.language | eng | - |
dc.publisher | Nihon Tenmon Gakkai. The Journal's web site is located at http://www.asj.or.jp/pasj/ | en_HK |
dc.relation.ispartof | Publications of the Astronomical Society of Japan | en_HK |
dc.subject | Galaxy: open clusters and associations: individual (Mercer et al.'s #4, #8, #13 | en_HK |
dc.subject | Stephenson's #2) | en_HK |
dc.subject | Masers | en_HK |
dc.subject | Stars: mass-loss | en_HK |
dc.subject | Stars: supergiants | en_HK |
dc.title | SiO and H 2O maser observations of red supergiants in star clusters embedded in the galactic disk | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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.email | Nakashima, JI: junichi@hku.hk | en_HK |
dc.identifier.email | Zhang, Y: zhangy96@hku.hk | en_HK |
dc.identifier.email | Kwok, S: deannote@hku.hk | en_HK |
dc.identifier.authority | Nakashima, JI=rp00764 | en_HK |
dc.identifier.authority | Zhang, Y=rp00841 | en_HK |
dc.identifier.authority | Kwok, S=rp00716 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.scopus | eid_2-s2.0-77953338012 | en_HK |
dc.identifier.hkuros | 170724 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-77953338012&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 62 | en_HK |
dc.identifier.issue | 2 | en_HK |
dc.identifier.spage | 391 | en_HK |
dc.identifier.epage | 407 | en_HK |
dc.identifier.isi | WOS:000279834900016 | - |
dc.publisher.place | Japan | en_HK |
dc.identifier.scopusauthorid | Deguchi, S=7006314159 | en_HK |
dc.identifier.scopusauthorid | Nakashima, JI=35485342300 | en_HK |
dc.identifier.scopusauthorid | Zhang, Y=23768446500 | en_HK |
dc.identifier.scopusauthorid | Chong, SSN=36106789800 | en_HK |
dc.identifier.scopusauthorid | Koike, K=26028631700 | en_HK |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_HK |
dc.identifier.issnl | 0004-6264 | - |