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Article: Correlation between infrared colors and intensity ratios of SiO maser lines

TitleCorrelation between infrared colors and intensity ratios of SiO maser lines
Authors
KeywordsMasers
Stars: Agb And Post-Agb
Stars: Late-Type
Stars: Mass Loss
Stars: Statistics
Issue Date2007
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2007, v. 669 n. 1, p. 446-458 How to Cite?
AbstractWe present the results of SiO millimeter line observations of a sample of known SiO maser sources covering a wide dust temperature range. A cold part of the sample was selected from the SiO maser sources found in our recent SiO maser survey of cold dusty objects. The aim of the present research is to investigate the causes of the correlation between infrared colors and SiO maser intensity ratios among different transition lines. In particular, the correlation between infrared colors and SiO maser intensity ratio among the J = 1-0ν = 1, 2, and 3 lines are our main concern in this paper. We observed in total 75 SiO maser sources with the Nobeyama 45 m telescope quasi-simultaneously in the SiO J = 1 -0 ν = 0, 1, 2, 3, 4 and J = 2-1 ν = 1, 2 lines. We also observed the sample in the 29SiO J=1-0 ν = 0 and J = 2-1 ν = 0 lines, 30SiO J = 1-0 ν = 0 line, and the H2O 6 1,6-52,3 line. As reported in previous papers, we confirmed that the intensity ratios of the SiO J = 1-0 ν = 2 to ν = 1 lines clearly correlate with infrared colors. In addition, we found possible correlation between infrared colors and the intensity ratios of the SiO J= 1-0 ν = 3 to v = 1 and 2 lines. Two overlap lines of H2O (i.e., 116,6 ν2 = 1 →127,5 ν2 = 0 and 50,5 ν2 = 2 → 63,4 ν2 = 1) might explain this correlation if these overlap lines become stronger with an increase of infrared colors, although the phenomena also might be explained in more fundamental ways if we take into account the variation of opacity from object to object. © 2007. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/175109
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNakashima, JIen_US
dc.contributor.authorDeguchi, Sen_US
dc.date.accessioned2012-11-26T08:49:16Z-
dc.date.available2012-11-26T08:49:16Z-
dc.date.issued2007en_US
dc.identifier.citationAstrophysical Journal Letters, 2007, v. 669 n. 1, p. 446-458en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175109-
dc.description.abstractWe present the results of SiO millimeter line observations of a sample of known SiO maser sources covering a wide dust temperature range. A cold part of the sample was selected from the SiO maser sources found in our recent SiO maser survey of cold dusty objects. The aim of the present research is to investigate the causes of the correlation between infrared colors and SiO maser intensity ratios among different transition lines. In particular, the correlation between infrared colors and SiO maser intensity ratio among the J = 1-0ν = 1, 2, and 3 lines are our main concern in this paper. We observed in total 75 SiO maser sources with the Nobeyama 45 m telescope quasi-simultaneously in the SiO J = 1 -0 ν = 0, 1, 2, 3, 4 and J = 2-1 ν = 1, 2 lines. We also observed the sample in the 29SiO J=1-0 ν = 0 and J = 2-1 ν = 0 lines, 30SiO J = 1-0 ν = 0 line, and the H2O 6 1,6-52,3 line. As reported in previous papers, we confirmed that the intensity ratios of the SiO J = 1-0 ν = 2 to ν = 1 lines clearly correlate with infrared colors. In addition, we found possible correlation between infrared colors and the intensity ratios of the SiO J= 1-0 ν = 3 to v = 1 and 2 lines. Two overlap lines of H2O (i.e., 116,6 ν2 = 1 →127,5 ν2 = 0 and 50,5 ν2 = 2 → 63,4 ν2 = 1) might explain this correlation if these overlap lines become stronger with an increase of infrared colors, although the phenomena also might be explained in more fundamental ways if we take into account the variation of opacity from object to object. © 2007. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectMasersen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Late-Typeen_US
dc.subjectStars: Mass Lossen_US
dc.subjectStars: Statisticsen_US
dc.titleCorrelation between infrared colors and intensity ratios of SiO maser linesen_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.doi10.1086/520825en_US
dc.identifier.scopuseid_2-s2.0-39049172720en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-39049172720&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume669en_US
dc.identifier.issue1en_US
dc.identifier.spage446en_US
dc.identifier.epage458en_US
dc.identifier.isiWOS:000250480600034-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US

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