Detection of the Molecular Zeeman Effect in Circular Polarization on Cool Active Stars

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dc.creatorBerdyugina, S. V.
dc.creatorPetit, P.
dc.creatorFluri, D. M.
dc.creatorAfram, N.
dc.creatorArnaud, J.
dc.date2007-03-21
dc.date.accessioned2026-07-07T07:52:58Z
dc.date.available2026-07-07T07:52:58Z
dc.descriptionWe report on the first ever detection of circular polarization in molecular lines forming in magnetic regions on the surfaces of active stars. The new observations were obtained with the high-resolution spectropolarimeter ESPaDOnS recently installed at the Canada-France-Hawaii Telescope. In July 2005 we carried out a survey of 17 G-K-M stars including active main-sequence dwarfs and RS CVn-type giants and subgiants. All stars were found to possess surface magnetic fields producing average atomic Stokes V signals of 0.05% to 0.5%. Three stars clearly showed circular polarization in molecular lines of 0.5% to 1%. The molecular Stokes V signal is reminiscent of that observed in sunspots.
dc.identifierhttps://arxiv.org/abs/astro-ph/0703560
dc.identifierhttp://arxiv.org/abs/astro-ph/0703560
dc.identifier2006, in Solar Polarization Workshop 4, eds. R. Casini and B. Lites, ASP Conf. Ser., vol. 358, p. 381-384
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126079
dc.subjectAstrophysics
dc.titleDetection of the Molecular Zeeman Effect in Circular Polarization on Cool Active Stars
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