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Article: Detection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950

TitleDetection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950
Authors
KeywordsCircumstellar Matter
Ism: Jets And Outflows
Masers
Stars: Imaging
Stars: Individual (Iras 19312+1950)
Stars: Winds, Outflows
Issue Date2004
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2004, v. 610 n. 1 II, p. L41-L44 How to Cite?
AbstractWe report results of an interferometric observation toward an SiO maser source, IRAS 19312+1950, in the HCO + J = 1-0 line with the Berkeley-Illinois-Maryland Association millimeter array. In the spatially integrated spectrum of HCO +, two kinematic components were seen: a strong line with a narrow width (∼2 km s -1, narrow component) and a weak symmetric line with a broad width (∼60 km s -1, broad component). The line profile of HCO + is reminiscent of that of CO. In the integrated intensity map, we found a pronounced bipolar shape consisting of the lower velocity part of the broad component. The higher velocity part of the broad component originated in a relatively small region (≲3″). The spatial structure of the narrow component clearly correlates with near-infrared structure. The position-velocity diagrams indicate the presence of a bipolar outflow with an expansion velocity of about 10 km s -1. On the basis of the present results, we suggest that the nature of the bipolar flow seen in IRAS 19312+1950 is explained by the hydrodynamical interaction between an asymptotic giant branch wind and ambient material with axial symmetric structure.
Persistent Identifierhttp://hdl.handle.net/10722/175138
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.accessioned2012-11-26T08:49:23Z-
dc.date.available2012-11-26T08:49:23Z-
dc.date.issued2004en_US
dc.identifier.citationAstrophysical Journal Letters, 2004, v. 610 n. 1 II, p. L41-L44en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175138-
dc.description.abstractWe report results of an interferometric observation toward an SiO maser source, IRAS 19312+1950, in the HCO + J = 1-0 line with the Berkeley-Illinois-Maryland Association millimeter array. In the spatially integrated spectrum of HCO +, two kinematic components were seen: a strong line with a narrow width (∼2 km s -1, narrow component) and a weak symmetric line with a broad width (∼60 km s -1, broad component). The line profile of HCO + is reminiscent of that of CO. In the integrated intensity map, we found a pronounced bipolar shape consisting of the lower velocity part of the broad component. The higher velocity part of the broad component originated in a relatively small region (≲3″). The spatial structure of the narrow component clearly correlates with near-infrared structure. The position-velocity diagrams indicate the presence of a bipolar outflow with an expansion velocity of about 10 km s -1. On the basis of the present results, we suggest that the nature of the bipolar flow seen in IRAS 19312+1950 is explained by the hydrodynamical interaction between an asymptotic giant branch wind and ambient material with axial symmetric structure.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.subjectCircumstellar Matteren_US
dc.subjectIsm: Jets And Outflowsen_US
dc.subjectMasersen_US
dc.subjectStars: Imagingen_US
dc.subjectStars: Individual (Iras 19312+1950)en_US
dc.subjectStars: Winds, Outflowsen_US
dc.titleDetection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950en_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.doi10.1086/423240en_US
dc.identifier.scopuseid_2-s2.0-4444269857en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4444269857&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume610en_US
dc.identifier.issue1 IIen_US
dc.identifier.spageL41en_US
dc.identifier.epageL44en_US
dc.identifier.isiWOS:000222701500011-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US

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