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Article: SiO maser survey toward the inner galactic disk: 40° ≤ l ≤ 70° and |b| ≤ 10°

TitleSiO maser survey toward the inner galactic disk: 40° ≤ l ≤ 70° and |b| ≤ 10°
Authors
KeywordsGalaxy: Kinematics And Dynamics
Masers
Radio Lines: Molecular: Circumstellar
Star: Late Type
Issue Date2003
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, 2003, v. 55 n. 1, p. 203-227 How to Cite?
AbstractWe present the results of an SiO maser survey for color-selected IRAS sources in the area 40° < l < 70° and |b| < 10° in the SiO J = 1-0, v = 1 and 2 transitions (∼ 43GHz). We detected 134 out of 272 observed sources in SiO masers; 127 were new detections. A systematic difference in the detection rates between SiO and OH maser searches was found. Especially, in the color ranges with log(F25/F12) smaller than -0.1, the detection rate of the SiO masers is significantly higher than that of OH masers. We found a possible kinematic influence of the Galactic arm on the distribution of SiO maser sources. It was found that the velocity dispersion of SiO maser sources tends to decrease with the galactocentric distance. Using the present and previous data of SiO maser surveys, we found that the local velocity gradient of the rotational velocity of the Galaxy is consistent with the values obtained from other kinds of disk population stars within a statistical uncertainty. The Oort's constants, A and B, were computed from the gradient of the rotation curve for the present data, and were consistent with the IAU standard values. In addition, in order to check the reliability of IRAS positions, we observed toward the MSX positions for 5 MSX counterparts, which are located more than 20″ away (but within 60″) from IRAS positions. We detected all of these 5 sources in SiO masers.
Persistent Identifierhttp://hdl.handle.net/10722/174838
ISSN
2015 Impact Factor: 1.961
2015 SCImago Journal Rankings: 0.804
References

 

DC FieldValueLanguage
dc.contributor.authorNakashima, JIen_US
dc.contributor.authorDeguchi, Sen_US
dc.date.accessioned2012-11-26T08:47:45Z-
dc.date.available2012-11-26T08:47:45Z-
dc.date.issued2003en_US
dc.identifier.citationPublications Of The Astronomical Society Of Japan, 2003, v. 55 n. 1, p. 203-227en_US
dc.identifier.issn0004-6264en_US
dc.identifier.urihttp://hdl.handle.net/10722/174838-
dc.description.abstractWe present the results of an SiO maser survey for color-selected IRAS sources in the area 40° < l < 70° and |b| < 10° in the SiO J = 1-0, v = 1 and 2 transitions (∼ 43GHz). We detected 134 out of 272 observed sources in SiO masers; 127 were new detections. A systematic difference in the detection rates between SiO and OH maser searches was found. Especially, in the color ranges with log(F25/F12) smaller than -0.1, the detection rate of the SiO masers is significantly higher than that of OH masers. We found a possible kinematic influence of the Galactic arm on the distribution of SiO maser sources. It was found that the velocity dispersion of SiO maser sources tends to decrease with the galactocentric distance. Using the present and previous data of SiO maser surveys, we found that the local velocity gradient of the rotational velocity of the Galaxy is consistent with the values obtained from other kinds of disk population stars within a statistical uncertainty. The Oort's constants, A and B, were computed from the gradient of the rotation curve for the present data, and were consistent with the IAU standard values. In addition, in order to check the reliability of IRAS positions, we observed toward the MSX positions for 5 MSX counterparts, which are located more than 20″ away (but within 60″) from IRAS positions. We detected all of these 5 sources in SiO masers.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: Kinematics And Dynamicsen_US
dc.subjectMasersen_US
dc.subjectRadio Lines: Molecular: Circumstellaren_US
dc.subjectStar: Late Typeen_US
dc.titleSiO maser survey toward the inner galactic disk: 40° ≤ l ≤ 70° and |b| ≤ 10°en_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-s2.0-0037509938en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037509938&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume55en_US
dc.identifier.issue1en_US
dc.identifier.spage203en_US
dc.identifier.epage227en_US
dc.publisher.placeJapanen_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US

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