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Article: SiO maser survey of IRAS sources in the inner galactic disk

TitleSiO maser survey of IRAS sources in the inner galactic disk
Authors
KeywordsGalaxy: Disk, Kinematics And Dynamics
Masers
Stars: Agb And Post-Agb
Issue Date2004
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, 2004, v. 56 n. 5, p. 765-802 How to Cite?
AbstractWe surveyed 401 color-selected IRAS sources in the galactic disk in the SiO J = 1-0, v = 1 and 2 maser lines at 43 GHz, resulting in 254 (239 new) detections. The observed sources lie mostly in a strip of the inner galactic disk with boundaries -10° < l < 40° and |b < 3°. This survey provides radial velocities of inner-disk stars for which optical measurements cannot be made due to interstellar extinction. The SiO l-v diagram in the area -10° < l < 40° exhibits fewer objects coincident with the molecular ring feature than does the OH 1612MHz source l-v map, indicating a slight difference of stellar type between SiO and OH emitting stars. After identifying all of the SiO detected sources in the 2MASS near-infrared catalog, we computed their luminosity distances based on the infrared fluxes. We then mapped these objects onto the first quadrant of the galactic plane. Combining the distances with the SiO radial velocities, we obtained a pattern speed for SiO maser sources, Ω P = 21(±13) km s -1 kpc -1, between the distances 1 and 5.5kpc, without the use of any dynamical models. The increase of the pattern speed toward the galactic center (up to 60km s -1 kpc -1 between the distances, 5.5 and 7kpc) suggests the presence of two pattern speeds in the Galaxy.
Persistent Identifierhttp://hdl.handle.net/10722/175230
ISSN
2015 Impact Factor: 1.961
2015 SCImago Journal Rankings: 0.804
References

 

DC FieldValueLanguage
dc.contributor.authorDeguchi, Sen_US
dc.contributor.authorFujii, Ten_US
dc.contributor.authorGlass, ISen_US
dc.contributor.authorImai, Hen_US
dc.contributor.authorIta, Yen_US
dc.contributor.authorIzumiura, Hen_US
dc.contributor.authorKameya, Oen_US
dc.contributor.authorMiyazaki, Aen_US
dc.contributor.authorNakada, Yen_US
dc.contributor.authorNakashima, JIen_US
dc.date.accessioned2012-11-26T08:55:03Z-
dc.date.available2012-11-26T08:55:03Z-
dc.date.issued2004en_US
dc.identifier.citationPublications Of The Astronomical Society Of Japan, 2004, v. 56 n. 5, p. 765-802en_US
dc.identifier.issn0004-6264en_US
dc.identifier.urihttp://hdl.handle.net/10722/175230-
dc.description.abstractWe surveyed 401 color-selected IRAS sources in the galactic disk in the SiO J = 1-0, v = 1 and 2 maser lines at 43 GHz, resulting in 254 (239 new) detections. The observed sources lie mostly in a strip of the inner galactic disk with boundaries -10° < l < 40° and |b < 3°. This survey provides radial velocities of inner-disk stars for which optical measurements cannot be made due to interstellar extinction. The SiO l-v diagram in the area -10° < l < 40° exhibits fewer objects coincident with the molecular ring feature than does the OH 1612MHz source l-v map, indicating a slight difference of stellar type between SiO and OH emitting stars. After identifying all of the SiO detected sources in the 2MASS near-infrared catalog, we computed their luminosity distances based on the infrared fluxes. We then mapped these objects onto the first quadrant of the galactic plane. Combining the distances with the SiO radial velocities, we obtained a pattern speed for SiO maser sources, Ω P = 21(±13) km s -1 kpc -1, between the distances 1 and 5.5kpc, without the use of any dynamical models. The increase of the pattern speed toward the galactic center (up to 60km s -1 kpc -1 between the distances, 5.5 and 7kpc) suggests the presence of two pattern speeds in the Galaxy.en_US
dc.languageengen_US
dc.publisherNihon Tenmon Gakkai. The Journal's web site is located at http://www.asj.or.jp/pasj/en_US
dc.relation.ispartofPublications of the Astronomical Society of Japanen_US
dc.subjectGalaxy: Disk, Kinematics And Dynamicsen_US
dc.subjectMasersen_US
dc.subjectStars: Agb And Post-Agben_US
dc.titleSiO maser survey of IRAS sources in the inner galactic disken_US
dc.typeArticleen_US
dc.identifier.emailNakashima, JI: junichi@hku.hken_US
dc.identifier.authorityNakashima, JI=rp00764en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-9544257267en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-9544257267&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume56en_US
dc.identifier.issue5en_US
dc.identifier.spage765en_US
dc.identifier.epage802en_US
dc.publisher.placeJapanen_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US
dc.identifier.scopusauthoridFujii, T=35407098300en_US
dc.identifier.scopusauthoridGlass, IS=7005360979en_US
dc.identifier.scopusauthoridImai, H=35484255500en_US
dc.identifier.scopusauthoridIta, Y=6603114538en_US
dc.identifier.scopusauthoridIzumiura, H=7003867533en_US
dc.identifier.scopusauthoridKameya, O=7003729470en_US
dc.identifier.scopusauthoridMiyazaki, A=7201588306en_US
dc.identifier.scopusauthoridNakada, Y=7102781029en_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US

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