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eps Aur abstract: Geise

Eclipse Spectropolarimetry of the epsilon Aurigae System

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Kathleen M. Geise
Robert E. Stencel

University of Denver, Department of Physics and Astronomy, 2112 E. Wesley Avenue, Denver, CO 80208

Nadine Manset

Canada-France-Hawaii Telescope Corporation (CFHT), Waimea Headquarters, 65-1238 Mamalahoa Highway, Kamuela, HI 96743

David Harrington
Jeffrey Kuhn

Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822

Received April 13, 2012; revised August 27, 2012, October 17, 2012; accepted November 4, 2012

Abstract

The recent eclipse of the enigmatic binary star system, epsilon Aurigae, offered a special opportunity to explore the role of spectropolarimetry in discovery of unknown facets of the objects involved. Here we present spectropolarimetric results for H-alpha, H-beta, Ca I (422.6 nm), and K I (769.9 nm) based on more than 50 epochs of high dispersion spectra obtained with the ESPaDOnS instrument at CFHT during 2006–2012.

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