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- Publisher Website: 10.1088/0004-637X/698/1/184
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Article: Multiple bipolar molecular outflows from the l1551 irs5 protostellar system
Title | Multiple bipolar molecular outflows from the l1551 irs5 protostellar system |
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Authors | |
Keywords | Ism: Jets And Outflows Stars: Formation Stars: Individual (L1551 Irs5) Stars: Low-Mass, Brown Dwarfs Stars: Pre-Main Sequence |
Issue Date | 2009 |
Publisher | Institute 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/175159 |
ISSN | 2023 Impact Factor: 8.8 2023 SCImago Journal Rankings: 2.766 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Wu, PF | en_US |
dc.contributor.author | Takakuwa, S | en_US |
dc.contributor.author | Lim, J | en_US |
dc.date.accessioned | 2012-11-26T08:49:29Z | - |
dc.date.available | 2012-11-26T08:49:29Z | - |
dc.date.issued | 2009 | en_US |
dc.identifier.citation | Astrophysical Journal Letters, 2009, v. 698 n. 1, p. 184-197 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175159 | - |
dc.description.abstract | The 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.language | eng | en_US |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205 | en_US |
dc.relation.ispartof | Astrophysical Journal Letters | en_US |
dc.subject | Ism: Jets And Outflows | en_US |
dc.subject | Stars: Formation | en_US |
dc.subject | Stars: Individual (L1551 Irs5) | en_US |
dc.subject | Stars: Low-Mass, Brown Dwarfs | en_US |
dc.subject | Stars: Pre-Main Sequence | en_US |
dc.title | Multiple bipolar molecular outflows from the l1551 irs5 protostellar system | en_US |
dc.type | Article | en_US |
dc.identifier.email | Lim, J: jjlim@hku.hk | en_US |
dc.identifier.authority | Lim, J=rp00745 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1088/0004-637X/698/1/184 | en_US |
dc.identifier.scopus | eid_2-s2.0-66649088942 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-66649088942&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 698 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.spage | 184 | en_US |
dc.identifier.epage | 197 | en_US |
dc.identifier.isi | WOS:000266373700014 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Wu, PF=45361579300 | en_US |
dc.identifier.scopusauthorid | Takakuwa, S=7003425073 | en_US |
dc.identifier.scopusauthorid | Lim, J=7403453870 | en_US |
dc.identifier.issnl | 2041-8205 | - |