File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1086/423240
- Scopus: eid_2-s2.0-4444269857
- WOS: WOS:000222701500011
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Detection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950
Title | Detection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950 |
---|---|
Authors | |
Keywords | Circumstellar Matter Ism: Jets And Outflows Masers Stars: Imaging Stars: Individual (Iras 19312+1950) Stars: Winds, Outflows |
Issue Date | 2004 |
Publisher | Institute 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? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/175138 |
ISSN | 2023 Impact Factor: 8.8 2023 SCImago Journal Rankings: 2.766 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Nakashima, JI | en_US |
dc.contributor.author | Deguchi, S | en_US |
dc.date.accessioned | 2012-11-26T08:49:23Z | - |
dc.date.available | 2012-11-26T08:49:23Z | - |
dc.date.issued | 2004 | en_US |
dc.identifier.citation | Astrophysical Journal Letters, 2004, v. 610 n. 1 II, p. L41-L44 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175138 | - |
dc.description.abstract | We 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.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 | Circumstellar Matter | en_US |
dc.subject | Ism: Jets And Outflows | en_US |
dc.subject | Masers | en_US |
dc.subject | Stars: Imaging | en_US |
dc.subject | Stars: Individual (Iras 19312+1950) | en_US |
dc.subject | Stars: Winds, Outflows | en_US |
dc.title | Detection of bipolar flow toward the unusual SiO maser source IRAS 19312+1950 | en_US |
dc.type | Article | en_US |
dc.identifier.email | Nakashima, JI: junichi@hku.hk | en_US |
dc.identifier.authority | Nakashima, JI=rp00764 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1086/423240 | en_US |
dc.identifier.scopus | eid_2-s2.0-4444269857 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-4444269857&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 610 | en_US |
dc.identifier.issue | 1 II | en_US |
dc.identifier.spage | L41 | en_US |
dc.identifier.epage | L44 | en_US |
dc.identifier.isi | WOS:000222701500011 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Nakashima, JI=35485342300 | en_US |
dc.identifier.scopusauthorid | Deguchi, S=7006314159 | en_US |
dc.identifier.issnl | 2041-8205 | - |