| DOI | Trouver le DOI : https://doi.org/10.1063/1.3701932 |
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| Auteur | Rechercher : Bohlender, David1; Rechercher : Monin, Dmitry1 |
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| Affiliation | - Conseil national de recherches du Canada. Infrastructure scientifique nationale
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| Format | Texte, Article |
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| Conférence | Stellar Polarimetry: From Birth to Death, June 27–30, 2011, Madison, WI, USA |
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| Résumé | A new polarimeter module has been built for the Dominion Astrophysical Observatory's (DAO) 1.8m Plaskett telescope for a hardware cost, including spare components, of approximately CDN$5,000. Implemented as a plug-in addition to the telescope's existing Cassegrain spectrograph, the device is being used to obtain medium resolution (R ≈ 10;000) circular spectropolarimetry of stars in an approximately 280Å wide wavelength region centered on the Hβ line. The intermediate resolution of the spectrograph permits stellar longitudinal magnetic field measurements to be made with both single or multiple strong metallic lines as well as the Hβ line. The instrument's dual-beam design together with fast switching of the liquid crystal wave plate (up to 100 Hz) synchronized with charge shuffling on the CCD is used to significantly reduce instrumental effects and achieve high precision polarimetric measurements. In this paper we present the first new science results obtained with the instrument. These include the discovery of a strong magnetic field and co-rotating magnetosphere in the helium-weak star HD176582, the detection of several new magnetic stars, and a study of the observed (and occasionally very large) differences in stellar longitudinal magnetic fields as measured with the Hβ line and metallic lines. |
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| Date de publication | 2012-05-02 |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21269042 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 01576917-e7d5-46d8-9378-eab5bffcd3d0 |
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| Enregistrement créé | 2013-12-02 |
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| Enregistrement modifié | 2020-04-21 |
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