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Atomic hydrogen in AGB circumstellar environments. A case study : X Her

hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorGARDAN, E.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorGERARD, E.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.authorLE BERTRE, T.
dc.date.issued2006
dc.identifier.issn0035-8711
dc.description.abstractEnWe report the detection of the Hi line at 21 cm from the circumstellar shell around the AGB star X Her using the position-switching technique with the Nan¸cay RadioTelescope. At the star position the line shows 2 components: (i) a broad one (FWHM 13 kms?1) centered at ?72.2 kms?1, and (ii) a narrow one (FWHM 4 kms?1) centered at ?70.6 kms?1. Our map shows that the source associated to the broad component is asymmetric with material flowing preferentially towards the North-East. This source extends to 10? ( 0.4 pc) from the star in that direction. On the other hand, the narrow component is detected only at the star position and indicates mate-rial flowing away from the observer. The total mass of atomic hydrogen is 6.5 10?3 M? which, within a factor 2, agrees with the estimate obtained from IRAS data at 60 ?m
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enstars: late- type
dc.subject.enstars: mass-loss
dc.subject.en(ISM:) planetary nebulae: general
dc.subject.enradio lines: stars
dc.subject.enstars: AGB and post-AGB
dc.subject.en(stars:) circumstellar matter
dc.subject.enradio lines: stars.
dc.title.enAtomic hydrogen in AGB circumstellar environments. A case study : X Her
dc.typeArticle de revue
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page245-254
bordeaux.volume365
bordeaux.peerReviewedoui
hal.identifierhal-00023313
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00023313v1
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