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Magnetic fields in AGB stars and (proto-) Planetary Nebulae

hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorHERPIN, Fabrice
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorBAUDRY, Alain
hal.structure.identifierGroupe de Recherche en Astronomie et Astrophysique du Languedoc [GRAAL]
dc.contributor.authorJOSSELIN, E.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorTHUM, C.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorWIESEMEYER, Helmut
dc.date.issued2009-04
dc.date.conference2008
dc.description.abstractEnDuring its quick transition to the Planetary Nebula stage, the Asymptotic Giant Branch star will completely change its geometry. This AGB stellar evolution stage is characterized by a high mass loss driven by the radiation pressure. Strong magnetic field may rule the mass loss geometry and the global shaping of these objects. Following our previous work on the polarization of the SiO maser emission in a representative sample of O-rich evolved stars, we present here a study towards C-rich objects and PPN/PN objects to obtain unbiased conclusions. Using Xpol at the IRAM-30 m telescope, we have conducted CN N=1-0 observations to investigate the Zeeman effect in this molecule and draw conclusion on the evolution of the magnetic field and its influence during the transition of an AGB star to the PN stage. Following the analysis described by Crutcher et al. (1996) we derive an estimate of the magnetic field.
dc.language.isoen
dc.source.title2009IAUS..259...47H - Cosmic Magnetic Fields: From Planets, to Stars and Galaxies, Proceedings of the International Astronomical Union,
dc.subject.enMagnetic field
dc.subject.enstars: evolution
dc.subject.enradio lines: stars
dc.subject.enISM: molecules
dc.title.enMagnetic fields in AGB stars and (proto-) Planetary Nebulae
dc.typeCommunication dans un congrès
dc.identifier.doi10.1017/S1743921309030051
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.page47-52
bordeaux.volume259
bordeaux.conference.titleCosmic Magnetic Fields: From Planets, to Stars and Galaxies, International Astronomical Union
bordeaux.countryFR
bordeaux.title.proceeding2009IAUS..259...47H - Cosmic Magnetic Fields: From Planets, to Stars and Galaxies, Proceedings of the International Astronomical Union,
bordeaux.peerReviewedoui
hal.identifierhal-00403359
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00403359v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=2009IAUS..259...47H%20-%20Cosmic%20Magnetic%20Fields:%20From%20Planets,%20to%20Stars%20and%20Galaxies,%20Proceedings%20of%20the%20International%20Astronomical%20Union,&rft.date=2009-04&rft.volume=259&rft.spage=47-52&rft.epage=47-52&rft.au=HERPIN,%20Fabrice&BAUDRY,%20Alain&JOSSELIN,%20E.&THUM,%20C.&WIESEMEYER,%20Helmut&rft.genre=unknown


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