Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1
We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS ( , 45.379033 GHz) emission line, using the Nobeyama 45 m telescope. The map shows that the TMC-1 filament has a diameter of ∼0.1 pc and a length of ∼0.5 pc at...
Gespeichert in:
| Veröffentlicht in: | The Astrophysical journal 2019-07, Vol.879 (2), p.88 |
|---|---|
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | 2 |
| container_start_page | 88 |
| container_title | The Astrophysical journal |
| container_volume | 879 |
| creator | Dobashi, Kazuhito Shimoikura, Tomomi Ochiai, Tetsu Nakamura, Fumitaka Kameno, Seiji Mizuno, Izumi Taniguchi, Kotomi |
| description | We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS ( , 45.379033 GHz) emission line, using the Nobeyama 45 m telescope. The map shows that the TMC-1 filament has a diameter of ∼0.1 pc and a length of ∼0.5 pc at a distance of 140 pc. The position-velocity diagrams of CCS clearly indicate the existence of velocity-coherent substructures in the filament. We identify 21 substructures that are coherent in the position-position-velocity space by eye. Most of the substructures are elongated along the major axis of the TMC-1 filament. The line densities of the subfilaments are close to the critical line density for the equilibrium (∼17 M☉ pc−1 for the excitation temperature of 10 K), suggesting that self-gravity should play an important role in the dynamics of the subfilaments. |
| doi_str_mv | 10.3847/1538-4357/ab25f0 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_O3W</sourceid><recordid>TN_cdi_proquest_journals_2365793748</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2365793748</sourcerecordid><originalsourceid>FETCH-LOGICAL-c445t-5b8120e1e1772299b01ed7fec4324198c16553396210b14748240dd9447178eb3</originalsourceid><addsrcrecordid>eNp9kE1LxDAQhoMouK7ePQb0aN18btKj1E9YUdhVvIU2nbJd6qYmjbD_3paKXsTTMMPzzgwPQqeUXHIt1IxKrhPBpZrlBZMV2UOTn9E-mhBCRDLn6u0QHYWwGVqWphP0fF0H6z7B77CrcJYt8Ss0ztbdLrFuDR62HV7GInQ-2i56CLje4m4NeJVHHwN-dA3Y2OQeZ42LJabH6KDKmwAn33WKXm5vVtl9sni6e8iuFokVQnaJLDRlBChQpVj_SUEolKoCKzgTNNWWzqXkPJ0zSgoqlNBMkLJMhVBUaSj4FJ2Ne1vvPiKEzmxc9Nv-pGF8LlXK-0xPkZGy3oXgoTKtr99zvzOUmMGbGSSZQZIZvfWRizFSu_Z35z_4-R943m6MVqlhRmvTlhX_Ahs8eQk</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2365793748</pqid></control><display><type>article</type><title>Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1</title><source>Institute of Physics Open Access Journal Titles</source><creator>Dobashi, Kazuhito ; Shimoikura, Tomomi ; Ochiai, Tetsu ; Nakamura, Fumitaka ; Kameno, Seiji ; Mizuno, Izumi ; Taniguchi, Kotomi</creator><creatorcontrib>Dobashi, Kazuhito ; Shimoikura, Tomomi ; Ochiai, Tetsu ; Nakamura, Fumitaka ; Kameno, Seiji ; Mizuno, Izumi ; Taniguchi, Kotomi</creatorcontrib><description>We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS ( , 45.379033 GHz) emission line, using the Nobeyama 45 m telescope. The map shows that the TMC-1 filament has a diameter of ∼0.1 pc and a length of ∼0.5 pc at a distance of 140 pc. The position-velocity diagrams of CCS clearly indicate the existence of velocity-coherent substructures in the filament. We identify 21 substructures that are coherent in the position-position-velocity space by eye. Most of the substructures are elongated along the major axis of the TMC-1 filament. The line densities of the subfilaments are close to the critical line density for the equilibrium (∼17 M☉ pc−1 for the excitation temperature of 10 K), suggesting that self-gravity should play an important role in the dynamics of the subfilaments.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ab25f0</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Coherence ; Emission lines ; ISM: abundances ; ISM: individual objects (TMC-1) ; ISM: kinematics and dynamics ; ISM: molecules ; ISM: structure ; Mapping ; Molecular clouds ; molecular data ; Substructures ; Velocity</subject><ispartof>The Astrophysical journal, 2019-07, Vol.879 (2), p.88</ispartof><rights>2019. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Jul 10, 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c445t-5b8120e1e1772299b01ed7fec4324198c16553396210b14748240dd9447178eb3</citedby><cites>FETCH-LOGICAL-c445t-5b8120e1e1772299b01ed7fec4324198c16553396210b14748240dd9447178eb3</cites><orcidid>0000-0002-5158-0063 ; 0000-0002-7210-6264 ; 0000-0001-8058-8577 ; 0000-0003-4402-6475 ; 0000-0002-1054-3004 ; 0000-0001-5431-2294</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/ab25f0/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,780,784,27924,27925,38890,53867</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/ab25f0$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Dobashi, Kazuhito</creatorcontrib><creatorcontrib>Shimoikura, Tomomi</creatorcontrib><creatorcontrib>Ochiai, Tetsu</creatorcontrib><creatorcontrib>Nakamura, Fumitaka</creatorcontrib><creatorcontrib>Kameno, Seiji</creatorcontrib><creatorcontrib>Mizuno, Izumi</creatorcontrib><creatorcontrib>Taniguchi, Kotomi</creatorcontrib><title>Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS ( , 45.379033 GHz) emission line, using the Nobeyama 45 m telescope. The map shows that the TMC-1 filament has a diameter of ∼0.1 pc and a length of ∼0.5 pc at a distance of 140 pc. The position-velocity diagrams of CCS clearly indicate the existence of velocity-coherent substructures in the filament. We identify 21 substructures that are coherent in the position-position-velocity space by eye. Most of the substructures are elongated along the major axis of the TMC-1 filament. The line densities of the subfilaments are close to the critical line density for the equilibrium (∼17 M☉ pc−1 for the excitation temperature of 10 K), suggesting that self-gravity should play an important role in the dynamics of the subfilaments.</description><subject>Astrophysics</subject><subject>Coherence</subject><subject>Emission lines</subject><subject>ISM: abundances</subject><subject>ISM: individual objects (TMC-1)</subject><subject>ISM: kinematics and dynamics</subject><subject>ISM: molecules</subject><subject>ISM: structure</subject><subject>Mapping</subject><subject>Molecular clouds</subject><subject>molecular data</subject><subject>Substructures</subject><subject>Velocity</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK7ePQb0aN18btKj1E9YUdhVvIU2nbJd6qYmjbD_3paKXsTTMMPzzgwPQqeUXHIt1IxKrhPBpZrlBZMV2UOTn9E-mhBCRDLn6u0QHYWwGVqWphP0fF0H6z7B77CrcJYt8Ss0ztbdLrFuDR62HV7GInQ-2i56CLje4m4NeJVHHwN-dA3Y2OQeZ42LJabH6KDKmwAn33WKXm5vVtl9sni6e8iuFokVQnaJLDRlBChQpVj_SUEolKoCKzgTNNWWzqXkPJ0zSgoqlNBMkLJMhVBUaSj4FJ2Ne1vvPiKEzmxc9Nv-pGF8LlXK-0xPkZGy3oXgoTKtr99zvzOUmMGbGSSZQZIZvfWRizFSu_Z35z_4-R943m6MVqlhRmvTlhX_Ahs8eQk</recordid><startdate>20190710</startdate><enddate>20190710</enddate><creator>Dobashi, Kazuhito</creator><creator>Shimoikura, Tomomi</creator><creator>Ochiai, Tetsu</creator><creator>Nakamura, Fumitaka</creator><creator>Kameno, Seiji</creator><creator>Mizuno, Izumi</creator><creator>Taniguchi, Kotomi</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-5158-0063</orcidid><orcidid>https://orcid.org/0000-0002-7210-6264</orcidid><orcidid>https://orcid.org/0000-0001-8058-8577</orcidid><orcidid>https://orcid.org/0000-0003-4402-6475</orcidid><orcidid>https://orcid.org/0000-0002-1054-3004</orcidid><orcidid>https://orcid.org/0000-0001-5431-2294</orcidid></search><sort><creationdate>20190710</creationdate><title>Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1</title><author>Dobashi, Kazuhito ; Shimoikura, Tomomi ; Ochiai, Tetsu ; Nakamura, Fumitaka ; Kameno, Seiji ; Mizuno, Izumi ; Taniguchi, Kotomi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-5b8120e1e1772299b01ed7fec4324198c16553396210b14748240dd9447178eb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Astrophysics</topic><topic>Coherence</topic><topic>Emission lines</topic><topic>ISM: abundances</topic><topic>ISM: individual objects (TMC-1)</topic><topic>ISM: kinematics and dynamics</topic><topic>ISM: molecules</topic><topic>ISM: structure</topic><topic>Mapping</topic><topic>Molecular clouds</topic><topic>molecular data</topic><topic>Substructures</topic><topic>Velocity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dobashi, Kazuhito</creatorcontrib><creatorcontrib>Shimoikura, Tomomi</creatorcontrib><creatorcontrib>Ochiai, Tetsu</creatorcontrib><creatorcontrib>Nakamura, Fumitaka</creatorcontrib><creatorcontrib>Kameno, Seiji</creatorcontrib><creatorcontrib>Mizuno, Izumi</creatorcontrib><creatorcontrib>Taniguchi, Kotomi</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Dobashi, Kazuhito</au><au>Shimoikura, Tomomi</au><au>Ochiai, Tetsu</au><au>Nakamura, Fumitaka</au><au>Kameno, Seiji</au><au>Mizuno, Izumi</au><au>Taniguchi, Kotomi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2019-07-10</date><risdate>2019</risdate><volume>879</volume><issue>2</issue><spage>88</spage><pages>88-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS ( , 45.379033 GHz) emission line, using the Nobeyama 45 m telescope. The map shows that the TMC-1 filament has a diameter of ∼0.1 pc and a length of ∼0.5 pc at a distance of 140 pc. The position-velocity diagrams of CCS clearly indicate the existence of velocity-coherent substructures in the filament. We identify 21 substructures that are coherent in the position-position-velocity space by eye. Most of the substructures are elongated along the major axis of the TMC-1 filament. The line densities of the subfilaments are close to the critical line density for the equilibrium (∼17 M☉ pc−1 for the excitation temperature of 10 K), suggesting that self-gravity should play an important role in the dynamics of the subfilaments.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/ab25f0</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-5158-0063</orcidid><orcidid>https://orcid.org/0000-0002-7210-6264</orcidid><orcidid>https://orcid.org/0000-0001-8058-8577</orcidid><orcidid>https://orcid.org/0000-0003-4402-6475</orcidid><orcidid>https://orcid.org/0000-0002-1054-3004</orcidid><orcidid>https://orcid.org/0000-0001-5431-2294</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 2019-07, Vol.879 (2), p.88 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_proquest_journals_2365793748 |
| source | Institute of Physics Open Access Journal Titles |
| subjects | Astrophysics Coherence Emission lines ISM: abundances ISM: individual objects (TMC-1) ISM: kinematics and dynamics ISM: molecules ISM: structure Mapping Molecular clouds molecular data Substructures Velocity |
| title | Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1 |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-26T02%3A20%3A16IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_O3W&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Discovery%20of%20CCS%20Velocity-coherent%20Substructures%20in%20the%20Taurus%20Molecular%20Cloud%201&rft.jtitle=The%20Astrophysical%20journal&rft.au=Dobashi,%20Kazuhito&rft.date=2019-07-10&rft.volume=879&rft.issue=2&rft.spage=88&rft.pages=88-&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.3847/1538-4357/ab25f0&rft_dat=%3Cproquest_O3W%3E2365793748%3C/proquest_O3W%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2365793748&rft_id=info:pmid/&rfr_iscdi=true |