Berlin 2014 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 4: Planeten

EP 4.6: Vortrag

Dienstag, 18. März 2014, 15:30–15:45, DO24 1.103

The Dynamics of Comet ISON C/2012 S1 near Perihelion — •Adalbert Ding1,5, Shadia Rifai Habbal2, Miloslav Druckmüller3, and Peter Aniol41Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Germany — 2Institute for Astronomy, University of Hawaii, Honolulu, Hawaii, USA — 3Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic — 4ASTELCO, Martinsried, Germany — 5Institut für Technische Physik, Berlin, Germany

Comet ISON C/2012 S1, discovered in 2012, was predicted to have a sun grazing orbit approaching the sun as near as 0.7 solar radii above its surface on Nov 28 2013 at 18:45 UT.

Direct white light images of the comet's tail trace moving through the inner corona were obtained with a wide angle Lyot-type coronograph. The perfect match between the observed inner corona orbit and the trail captured by the LASCO/C2 coronograph was proven using a special correlation procedure.

A high resolution imaging slit spectrometer designed to investigate emission lines simultaneously in 2 different bands An external linear occulter was used to discriminate between the sun's and the comet's emission location. Line spectra were observed which display distinct features of diatomic molecular emission differing from the atomic and molecular absorption features in the sun's spectrum. In a preliminary analysis these were assigned to the C2 molecular emission features (Swan bands) and possibly CO+ emission.

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