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Article: Multiple bipolar molecular outflows from the l1551 irs5 protostellar system

TitleMultiple bipolar molecular outflows from the l1551 irs5 protostellar system
Authors
KeywordsIsm: Jets And Outflows
Stars: Formation
Stars: Individual (L1551 Irs5)
Stars: Low-Mass, Brown Dwarfs
Stars: Pre-Main Sequence
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2009, v. 698 n. 1, p. 184-197 How to Cite?
AbstractThe multiple protostellar system L1551 IRS5 exhibits a large-scale bipolar molecular outflow that spans 1.5 pc on both the northeast (redshifted) and southwest (blueshifted) sides of the system. We have studied this outflow within 4000 AU of its driving source(s) with the Submillimeter Array. Our CO(2-1) image at 4″ (560 AU) resolution reveals three distinct components: (1) an X-shaped structure spanning 20″ from center with a similar symmetry axis and velocity pattern as the large-scale outflow; (2) an S-shaped structure spanning 10″ from center also with a similar symmetry axis but opposite velocity pattern to the large-scale outflow; and (3) a compact central component spanning 14 from center again with a similar symmetry axis and velocity pattern as the large-scale outflow. The X-shaped component likely comprises the limb-brightened walls of a cone-shaped cavity excavated by the outflows from the two main protostellar components. The compact central component likely comprises material within this cavity newly entrained by one or both outflows from the two main protostellar components. The S-shaped component mostly likely comprises a precessing outflow with its symmetry axis inclined in the opposite sense to the plane of the sky than the other two components, taking the S-shaped component out of the cone-shaped cavity along most, if not all, of its entire length. This outflow may be driven by a recently reported candidate third protostellar component in L1551 IRS5, whose circumstellar disk is misaligned relative to the two main protostellar components. Gravitational interactions between this protostellar component and its more massive northern (and perhaps also southern) neighbor(s) may be causing the circumstellar disk and hence outflow of this component to precess. © 2009. The American Astronomical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175159
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWu, PFen_US
dc.contributor.authorTakakuwa, Sen_US
dc.contributor.authorLim, Jen_US
dc.date.accessioned2012-11-26T08:49:29Z-
dc.date.available2012-11-26T08:49:29Z-
dc.date.issued2009en_US
dc.identifier.citationAstrophysical Journal Letters, 2009, v. 698 n. 1, p. 184-197en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175159-
dc.description.abstractThe multiple protostellar system L1551 IRS5 exhibits a large-scale bipolar molecular outflow that spans 1.5 pc on both the northeast (redshifted) and southwest (blueshifted) sides of the system. We have studied this outflow within 4000 AU of its driving source(s) with the Submillimeter Array. Our CO(2-1) image at 4″ (560 AU) resolution reveals three distinct components: (1) an X-shaped structure spanning 20″ from center with a similar symmetry axis and velocity pattern as the large-scale outflow; (2) an S-shaped structure spanning 10″ from center also with a similar symmetry axis but opposite velocity pattern to the large-scale outflow; and (3) a compact central component spanning 14 from center again with a similar symmetry axis and velocity pattern as the large-scale outflow. The X-shaped component likely comprises the limb-brightened walls of a cone-shaped cavity excavated by the outflows from the two main protostellar components. The compact central component likely comprises material within this cavity newly entrained by one or both outflows from the two main protostellar components. The S-shaped component mostly likely comprises a precessing outflow with its symmetry axis inclined in the opposite sense to the plane of the sky than the other two components, taking the S-shaped component out of the cone-shaped cavity along most, if not all, of its entire length. This outflow may be driven by a recently reported candidate third protostellar component in L1551 IRS5, whose circumstellar disk is misaligned relative to the two main protostellar components. Gravitational interactions between this protostellar component and its more massive northern (and perhaps also southern) neighbor(s) may be causing the circumstellar disk and hence outflow of this component to precess. © 2009. The American Astronomical Society.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.subjectIsm: Jets And Outflowsen_US
dc.subjectStars: Formationen_US
dc.subjectStars: Individual (L1551 Irs5)en_US
dc.subjectStars: Low-Mass, Brown Dwarfsen_US
dc.subjectStars: Pre-Main Sequenceen_US
dc.titleMultiple bipolar molecular outflows from the l1551 irs5 protostellar systemen_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0004-637X/698/1/184en_US
dc.identifier.scopuseid_2-s2.0-66649088942en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-66649088942&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume698en_US
dc.identifier.issue1en_US
dc.identifier.spage184en_US
dc.identifier.epage197en_US
dc.identifier.isiWOS:000266373700014-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWu, PF=45361579300en_US
dc.identifier.scopusauthoridTakakuwa, S=7003425073en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US

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