Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112
We present high spatial resolution mid-infrared images of the nebula around the late-type carbon-rich Wolf-Rayet (WC)-OB binary system WR 112 taken by the recently upgraded VLT spectrometer and imager for the mid-infrared (VISIR) with the PAH1, Ne ii-2, and Q3 filters. The observations reveal a morp...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/379927 |
| Acceso en línea: | http://hdl.handle.net/10261/379927 |
| Access Level: | acceso abierto |
| Palabra clave: | Infrared: stars Stars: individual (WR 112) Stars: winds, outflows Stars: Wolf–Rayet |
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Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| title |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| spellingShingle |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 Lau, R. M. Infrared: stars Stars: individual (WR 112) Stars: winds, outflows Stars: Wolf–Rayet |
| title_short |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| title_full |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| title_fullStr |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| title_full_unstemmed |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| title_sort |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112 |
| dc.creator.none.fl_str_mv |
Lau, R. M. Hankins, Matthew J. Schödel, Rainer Sanchez-Bermudez, J. Moffat, A. F. J. Ressler, M. E. |
| author |
Lau, R. M. |
| author_facet |
Lau, R. M. Hankins, Matthew J. Schödel, Rainer Sanchez-Bermudez, J. Moffat, A. F. J. Ressler, M. E. |
| author_role |
author |
| author2 |
Hankins, Matthew J. Schödel, Rainer Sanchez-Bermudez, J. Moffat, A. F. J. Ressler, M. E. |
| author2_role |
author author author author author |
| dc.contributor.none.fl_str_mv |
National Science Foundation (US) National Research Council of Canada Comisión Nacional de Investigación Científica y Tecnológica (Chile) Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina) Ministério da Ciência, Tecnologia e Inovação (Brasil) NASA European Commission European Research Council Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Infrared: stars Stars: individual (WR 112) Stars: winds, outflows Stars: Wolf–Rayet |
| topic |
Infrared: stars Stars: individual (WR 112) Stars: winds, outflows Stars: Wolf–Rayet |
| description |
We present high spatial resolution mid-infrared images of the nebula around the late-type carbon-rich Wolf-Rayet (WC)-OB binary system WR 112 taken by the recently upgraded VLT spectrometer and imager for the mid-infrared (VISIR) with the PAH1, Ne ii-2, and Q3 filters. The observations reveal a morphology resembling a series of arc-like filaments and broken shells. Dust temperatures and masses are derived for each of the identified filamentary structures, which exhibit temperatures ranging from K at the exterior W2 filament to K in the central 3″. The total dust mass summed over the features is 2.6 ± 0.4 × 10 M. A multi-epoch analysis of mid-IR photometry of WR 112 over the past ∼20 years reveals no significant variability in the observed dust temperature and mass. The morphology of the mid-IR dust emission from WR 112 also exhibits no significant expansion from imaging data taken in 2001, 2007, and 2016, which disputes the current interpretation of the nebula as a high expansion velocity (∼1200 km s) "pinwheel"-shaped outflow driven by the central WC-OB colliding-wind binary. An upper limit of ≲120 km s is derived for the expansion velocity assuming a distance of 4.15 kpc. The upper limit on the average total mass-loss rate from the central 3″ of WR 112 is estimated to be ≲8 × 10 M year. We leave its true nature as an open question, but propose that the WR 112 nebula may have formed in the outflow during a previous red or yellow supergiant phase of the central Wolf-Rayet star. © 2017. The American Astronomical Society. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2025 2025 2025 |
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info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Postprint info:eu-repo/semantics/acceptedVersion |
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article |
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acceptedVersion |
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http://hdl.handle.net/10261/379927 |
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http://hdl.handle.net/10261/379927 |
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Inglés |
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Inglés |
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info:eu-repo/semantics/openAccess |
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openAccess |
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American Astronomical Society |
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American Astronomical Society |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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1869422689747206144 |
| spelling |
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112Lau, R. M.Hankins, Matthew J.Schödel, RainerSanchez-Bermudez, J.Moffat, A. F. J.Ressler, M. E.Infrared: starsStars: individual (WR 112)Stars: winds, outflowsStars: Wolf–RayetWe present high spatial resolution mid-infrared images of the nebula around the late-type carbon-rich Wolf-Rayet (WC)-OB binary system WR 112 taken by the recently upgraded VLT spectrometer and imager for the mid-infrared (VISIR) with the PAH1, Ne ii-2, and Q3 filters. The observations reveal a morphology resembling a series of arc-like filaments and broken shells. Dust temperatures and masses are derived for each of the identified filamentary structures, which exhibit temperatures ranging from K at the exterior W2 filament to K in the central 3″. The total dust mass summed over the features is 2.6 ± 0.4 × 10 M. A multi-epoch analysis of mid-IR photometry of WR 112 over the past ∼20 years reveals no significant variability in the observed dust temperature and mass. The morphology of the mid-IR dust emission from WR 112 also exhibits no significant expansion from imaging data taken in 2001, 2007, and 2016, which disputes the current interpretation of the nebula as a high expansion velocity (∼1200 km s) "pinwheel"-shaped outflow driven by the central WC-OB colliding-wind binary. An upper limit of ≲120 km s is derived for the expansion velocity assuming a distance of 4.15 kpc. The upper limit on the average total mass-loss rate from the central 3″ of WR 112 is estimated to be ≲8 × 10 M year. We leave its true nature as an open question, but propose that the WR 112 nebula may have formed in the outflow during a previous red or yellow supergiant phase of the central Wolf-Rayet star. © 2017. The American Astronomical Society.This work is based on observations made with the VISIR instrument on the ESO VLT telescope (program ID. 097.D0707A) and observations obtained at the Gemini Observatory (P.ID: GS-2007A-Q-38), which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina), and Ministério da Ciência, Tecnologia e Inovação (Brazil). This work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. M.J.H. acknowledges support from the National Science Foundation Graduate Research Fellowship under grant No. DGE-1144153. J.S.B. acknowledges that this work was partly supported by OPTICON, which is sponsored by the European Commission’s FP7 Capacities programme (grant No. 312430). A.F.J.M. is grateful for financial aid to NSERC (Canada) and FQRNT (Quebec). R.S. acknowledges funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/ 2007-2013) / ERC grant agreement No. [614922]. R.L. would like to thank Sergey Marchenko for valuable feedback and comments, and Jim De Buizer and James Radomski for the helpful insight on T-ReCS imaging data. R. L. also thanks Astrid Lamberts for the enlightening conversations on colliding-wind binaries. Finally, we thank the anonymous referee for the insightful suggestions and comments.American Astronomical SocietyNational Science Foundation (US)National Research Council of CanadaComisión Nacional de Investigación Científica y Tecnológica (Chile)Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina)Ministério da Ciência, Tecnologia e Inovação (Brasil)NASAEuropean CommissionEuropean Research CouncilConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520172025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/379927reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/312430info:eu-repo/grantAgreement/EC/FP7/614922http://dx.doi.org/10.3847/2041-8213/835/2/L31Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3799272026-05-22T06:33:51Z |
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