A new look into the spectral and light variations of epsilon Aur

2013/03/26 by P. Harmanec, H. Božić, Harmanec, P. +21
Physics and Astronomy · #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.1303.6401

10 pages, 11 figures. Contributed to the 11th Hvar Astrophysical Colloquium : The Most Mysterious Binaries: Significance for Astrophysics, Hvar, July 2012

arxiv created 2013/03/26 · arxiv updated 2013/03/27

Abstract

Investigating long series of spectral and photometric observations, we found that the orbital elements of epsilon Aur are subject to much larger uncertainties than usually believed. The H alpha emission is found to move basically with the F primary but its exact location should still be investigated. We also find strong additional absorption and large reddening of the object near the third contact during the eclipse. Episodic atmospheric mass transfer from the F primary towards its companion is tentatively suggested.

Related

• Hα spectral monitoring of epsilon Aurigae 2009-2011 eclipse
• Comparison of the infrared magnitudes of the eclipsing variable star epsilon Aur during the two main luminance lows using observations from 1980 to 2015
• Epsilon Aurigae in Total Eclipse, 2010 - Mid-eclipse report
• Gearing Up for Epsilon Aurigae's First Eclipse of the Millennium
• The International Epsilon Aurigae Campaign 2009-2011. A description of the campaign and early results to May 2010