• Corpus ID: 117879709

High cadence measurement of neutral sodium and potassium absorption during the 2009-2011 eclipse of epsilon Aurigae

@article{Leadbeater2012HighCM,
  title={High cadence measurement of neutral sodium and potassium absorption during the 2009-2011 eclipse of epsilon Aurigae},
  author={Robin Leadbeater and Christian Buil and T. Garrel and S. Gorodenski and T. Hansen and Lothar Schanne and Robert E. Stencel and Ba. Stober and Olivier Thizy},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2012}
}
The results of a spectroscopic survey of epsilon Aurigae during eclipse using a network of small telescopes are presented. The spectra have a resolution of 0.35 to 0.65{\AA} and cover the period 2008 to 2012 with a typical interval of 4 days during eclipse. This paper specifically covers variations in the K I 7699{\AA}, Na D and Mg II 4481{\AA} lines. Absorption started increasing in the KI 7699{\AA} line 3 months before the eclipse began photometrically and had not returned to pre eclipse… 

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