The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity
We present the results of our survey of 1612-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Large Magellanic Cloud (LMC). We have discovered four new circumstellar maser sources in the LMC, and increased the number of reliable wind spee...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| 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:10261/378152 |
| Acceso en línea: | http://hdl.handle.net/10261/378152 |
| Access Level: | acceso abierto |
| Palabra clave: | Masers Stars: AGB and post-AGB Stars: mass-loss Supergiants Stars: winds, outflows Magellanic Clouds. |
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The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicityGoldman, S.R.van Loon, Jacco Th.Zijlstra, AlbertGreen, James A.Wood, Peter R.Nanni, AmbraImai, HiroshiWhitelock, P.A.Matsuura, MikakoGroenewegen, M.A.T.Gómez, José F.MasersStars: AGB and post-AGBStars: mass-lossSupergiantsStars: winds, outflowsMagellanic Clouds.We present the results of our survey of 1612-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Large Magellanic Cloud (LMC). We have discovered four new circumstellar maser sources in the LMC, and increased the number of reliable wind speeds from infrared (IR) stars in the LMC from 5 to 13. Using our new wind speeds, as well as those from Galactic sources, we have derived an updated relation for dust-driven winds: v ∝ ZL. We compare the subsolar metallicityLMC OH/IR stars with carefully selected samples of more metal-rich OH/IR stars, also at known distances, in the Galactic Centre and Galactic bulge. We derive pulsation periods for eight of the bulge stars for the first time by using near-IR photometry from the VistaVariables in the Via Lactea survey.We have modelled our LMC OH/IR stars and developed an empirical method of deriving gas-to-dust ratios and mass-loss rates by scaling the models to the results from maser profiles.We have done this also for samples in the Galactic Centre and bulge and derived a new mass-loss prescription which includes luminosity, pulsation period, and gas-to-dust ratio M˙ = 1.06 × 10(L/10 L)(P/500 d)(r/200) M yr. The tightest correlation is found between mass-loss rate and luminosity. We find that the gas-to-dust ratio has little effect on the mass-loss of oxygen-rich AGB stars and RSGs within the Galaxy and the LMC. This suggests that the mass-loss of oxygen-rich AGB stars and RSGs is (nearly) independent of metallicity between a half and twice solar. © 2016 The AuthorsWe would like to thank the support staff at CSIRO for their help with the observations, Michele Costa for his help with the SEDfitting code, Oliver Turner for his help with the pulsation period analysis, and Malcolm Gray for his helpful discussion on maser pumping mechanisms. We would also like to thank Phillip Edwards for generously allocating Director’s Discretionary Time to the project. This research made use of the DUCHAMP source finder, produced at the Australia Telescope National Facility, CSIRO, by M. Whiting. This paper makes use of the SIMBAD data base of the CDS. SRG acknowledges financial support from the Royal Astronomical Society and Keele Postgraduate Association. AN acknowledges the support from the project STARKEY funded by the ERC Consolidator Grant, G.A. No. 615604. PAW acknowledges a research grant from the South African National Research Foundation. JFG is supported by MINECO (Spain) grantAYA2014-57369-C3-3 (co-funded by FEDER). AAZ was supported by the Science and Technology Research Council under grantST/L000768/1, and JvL under grant ST/M001040/1. HI is supported by JSPS KAKENHI (25610043) and the Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation.Oxford University PressEuropean Research CouncilMinisterio de Economía y Competitividad (España)European CommissionScience and Technology Facilities Council (UK)Japan Society for the Promotion of ScienceConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520172025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/378152reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//AYA2014-57369-C3-3-Phttp://dx.doi.org/10.1093/mnras/stw2708Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3781522026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| title |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| spellingShingle |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity Goldman, S.R. Masers Stars: AGB and post-AGB Stars: mass-loss Supergiants Stars: winds, outflows Magellanic Clouds. |
| title_short |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| title_full |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| title_fullStr |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| title_full_unstemmed |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| title_sort |
The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity |
| dc.creator.none.fl_str_mv |
Goldman, S.R. van Loon, Jacco Th. Zijlstra, Albert Green, James A. Wood, Peter R. Nanni, Ambra Imai, Hiroshi Whitelock, P.A. Matsuura, Mikako Groenewegen, M.A.T. Gómez, José F. |
| author |
Goldman, S.R. |
| author_facet |
Goldman, S.R. van Loon, Jacco Th. Zijlstra, Albert Green, James A. Wood, Peter R. Nanni, Ambra Imai, Hiroshi Whitelock, P.A. Matsuura, Mikako Groenewegen, M.A.T. Gómez, José F. |
| author_role |
author |
| author2 |
van Loon, Jacco Th. Zijlstra, Albert Green, James A. Wood, Peter R. Nanni, Ambra Imai, Hiroshi Whitelock, P.A. Matsuura, Mikako Groenewegen, M.A.T. Gómez, José F. |
| author2_role |
author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
European Research Council Ministerio de Economía y Competitividad (España) European Commission Science and Technology Facilities Council (UK) Japan Society for the Promotion of Science Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Masers Stars: AGB and post-AGB Stars: mass-loss Supergiants Stars: winds, outflows Magellanic Clouds. |
| topic |
Masers Stars: AGB and post-AGB Stars: mass-loss Supergiants Stars: winds, outflows Magellanic Clouds. |
| description |
We present the results of our survey of 1612-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Large Magellanic Cloud (LMC). We have discovered four new circumstellar maser sources in the LMC, and increased the number of reliable wind speeds from infrared (IR) stars in the LMC from 5 to 13. Using our new wind speeds, as well as those from Galactic sources, we have derived an updated relation for dust-driven winds: v ∝ ZL. We compare the subsolar metallicityLMC OH/IR stars with carefully selected samples of more metal-rich OH/IR stars, also at known distances, in the Galactic Centre and Galactic bulge. We derive pulsation periods for eight of the bulge stars for the first time by using near-IR photometry from the VistaVariables in the Via Lactea survey.We have modelled our LMC OH/IR stars and developed an empirical method of deriving gas-to-dust ratios and mass-loss rates by scaling the models to the results from maser profiles.We have done this also for samples in the Galactic Centre and bulge and derived a new mass-loss prescription which includes luminosity, pulsation period, and gas-to-dust ratio M˙ = 1.06 × 10(L/10 L)(P/500 d)(r/200) M yr. The tightest correlation is found between mass-loss rate and luminosity. We find that the gas-to-dust ratio has little effect on the mass-loss of oxygen-rich AGB stars and RSGs within the Galaxy and the LMC. This suggests that the mass-loss of oxygen-rich AGB stars and RSGs is (nearly) independent of metallicity between a half and twice solar. © 2016 The Authors |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/378152 |
| url |
http://hdl.handle.net/10261/378152 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO//AYA2014-57369-C3-3-P http://dx.doi.org/10.1093/mnras/stw2708 Sí |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
Oxford University Press |
| publisher.none.fl_str_mv |
Oxford University Press |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869425533185425408 |
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15,812429 |