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Conference Paper: Nature of highly extended CS(J=7-6) emission around low-mass protostar L483

TitleNature of highly extended CS(J=7-6) emission around low-mass protostar L483
Authors
KeywordsStars: formation, molecular data, submillimeter
Issue Date2016
PublisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU
Citation
The 2015 IAU Symposium 315, Honolulu, HI., 3-7 August 2015. In Conference Proceedings, 2016, v. 11 n. S315, p. 1-2 How to Cite?
AbstractSingle-dish observations in CS(J=7-6) using the Atacama Submillimeter Telescope Experiment (ASTE) reveal emission extending out to thousands of AU from low-mass protostars, much larger than is expected based on simple models for their envelopes. Hypotheses for this emission invoke gas dispersed from the envelope surfaces facing the bipolar outflow cavities. Here, we combine interferometric data from the Submillimeter Array (SMA) with the previous single-dish data from ASTE for the low-mass protostar L483 to study the spatial-kinematic structure of its CS(J=7-6) emission on projected scales >/~600 AU. In addition to providing more detailed information for the extended component, our combined maps reveal a compact central component in CS(J=7-6) having a steeper velocity gradient. Both the compact and extended components exhibit a velocity gradient in the opposite sense to that of a bipolar molecular outflow traced in CO(J=2-1). Finding that previous models make a number of wrong predictions for the observed features, we propose that both CS(J=7-6) components are produced by rotating and infalling gas along the envelope surfaces exposed by the bipolar outflow and therefore subjected to stellar irradiation and outflow compression.
DescriptionIAUS 315 entitled: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes?
Persistent Identifierhttp://hdl.handle.net/10722/241025
ISSN
2015 SCImago Journal Rankings: 0.105

 

DC FieldValueLanguage
dc.contributor.authorLeung, YC-
dc.contributor.authorLim, JJL-
dc.contributor.authorTakakuwa, S-
dc.date.accessioned2017-05-22T09:21:18Z-
dc.date.available2017-05-22T09:21:18Z-
dc.date.issued2016-
dc.identifier.citationThe 2015 IAU Symposium 315, Honolulu, HI., 3-7 August 2015. In Conference Proceedings, 2016, v. 11 n. S315, p. 1-2-
dc.identifier.issn1743-9213-
dc.identifier.urihttp://hdl.handle.net/10722/241025-
dc.descriptionIAUS 315 entitled: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes?-
dc.description.abstractSingle-dish observations in CS(J=7-6) using the Atacama Submillimeter Telescope Experiment (ASTE) reveal emission extending out to thousands of AU from low-mass protostars, much larger than is expected based on simple models for their envelopes. Hypotheses for this emission invoke gas dispersed from the envelope surfaces facing the bipolar outflow cavities. Here, we combine interferometric data from the Submillimeter Array (SMA) with the previous single-dish data from ASTE for the low-mass protostar L483 to study the spatial-kinematic structure of its CS(J=7-6) emission on projected scales >/~600 AU. In addition to providing more detailed information for the extended component, our combined maps reveal a compact central component in CS(J=7-6) having a steeper velocity gradient. Both the compact and extended components exhibit a velocity gradient in the opposite sense to that of a bipolar molecular outflow traced in CO(J=2-1). Finding that previous models make a number of wrong predictions for the observed features, we propose that both CS(J=7-6) components are produced by rotating and infalling gas along the envelope surfaces exposed by the bipolar outflow and therefore subjected to stellar irradiation and outflow compression.-
dc.languageeng-
dc.publisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU-
dc.relation.ispartofInternational Astronomical Union Proceedings-
dc.rightsInternational Astronomical Union Proceedings. Copyright © Cambridge University Press.-
dc.subjectStars: formation, molecular data, submillimeter-
dc.titleNature of highly extended CS(J=7-6) emission around low-mass protostar L483-
dc.typeConference_Paper-
dc.identifier.emailLeung, YC: shigi@hku.hk-
dc.identifier.emailLim, JJL: jjlim@hku.hk-
dc.identifier.authorityLim, JJL=rp00745-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1017/S1743921316008103-
dc.identifier.hkuros272092-
dc.identifier.volume11-
dc.identifier.issueS315-
dc.identifier.spage1-
dc.identifier.epage2-
dc.publisher.placeUnited Kingdom-

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