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SiO maser polarization in evolved stars: magnetic field

hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorHERPIN, Fabrice
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBAUDRY, Alain
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorTHUM, C.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorWIESEMEYER, Helmut
hal.structure.identifierDiagnostic Imaging and Research Institute
dc.contributor.authorMORRIS, D.
dc.date.issued2005
dc.date.conference2005-09-28
dc.description.abstractEnWe have measured the polarization of the SiO maser emission in a representative sample of evolved stars. We made simultaneous spectroscopic measurement of the 4 Stokes parameters, from which we derive the circular and linear polarization levels. These observations allow us to discuss the existent SiO maser models, to derive the strength of the magnetic field, and thus to determine the real influence of this magnetic field in the life of these evolved objects. The magnetic field strength we derive varies between 0 and 18 Gauss, with a mean value of 3.5 G and may follow a 1/r law throughout the circumstellar envelope. As a consequence, the magnetic field has a real influence on the life of these evolved objects: it definitively plays the role of a collimating, and more generally, of a shaping, agent in evolved objects.
dc.language.isoen
dc.source.title2005AIPC..784..613H - MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings,
dc.subject.enstellar polarimetry
dc.subject.enastronomical masers
dc.subject.enmagnetic fields
dc.subject.enstars
dc.subject.eninterstellar matter
dc.title.enSiO maser polarization in evolved stars: magnetic field
dc.typeCommunication dans un congrès
dc.identifier.doi10.1063/1.2077227
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.page613-628
bordeaux.volume784
bordeaux.conference.titleMAGNETIC FIELDS IN THE UNIVERSE
bordeaux.countryFR
bordeaux.title.proceeding2005AIPC..784..613H - MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings,
bordeaux.peerReviewedoui
hal.identifierhal-00403394
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00403394v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=2005AIPC..784..613H%20-%20MAGNETIC%20FIELDS%20IN%20THE%20UNIVERSE:%20From%20Laboratory%20and%20Stars%20to%20Primordial%20Structures.%20AIP%20Conference%20Proceedings,&rft.date=2005&rft.volume=784&rft.spage=613-628&rft.epage=613-628&rft.au=HERPIN,%20Fabrice&BAUDRY,%20Alain&THUM,%20C.&WIESEMEYER,%20Helmut&MORRIS,%20D.&rft.genre=unknown


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