Berlin 2014 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 5: Postersitzung
EP 5.21: Poster
Dienstag, 18. März 2014, 16:30–18:30, DO24 Foyer
Comet ISON - from cradle to grave: The perihelion passage — •Jessica Agarwal1, Hermann Boehnhardt1, Dietmar Germerott1, Ulrich Hopp2, Bernd Inhester1, Luisa Lara3, Nilda Oklay1, Borut Podlipnik1, Christoph Ries2, Michael Schmidt2, Udo Schühle1, Colin Snodgrass1, Sami Solanki1, Bringfried Stecklum4, Luca Teriaca1, Cecilia Tubiana1, and Jean-Baptiste Vincent1 — 1Max-Planck Institut für Sonnensystemforschung — 2Universitätssternwarte München — 3Instituto de Astrofísica de Andalucía — 4Thüringer Landessternwarte Tautenburg
Comet ISON came from the Oort Cloud (10000 - 100000 AU), the outermost region of the Solar System, where the debris from the formation of giant planets and possible extra-solar comets is stored since the early days of the Sun existence. The comet approached the Sun within 0.012AU on 28 Nov. 2013. The fatal disintegration of the nucleus occurred close to the Sun in two steps: About 1.5 days before perihelion, an explosion of the nucleus produced an armada of fragments that continued on the track of the comet with fading activity. The subnuclei exhausted their icy fuel shortly before reaching perihelion and dissolved in a cloud of dust. This cloud and some solid material from the nucleus explosion escaped the Sun and witness the death of the nucleus of comet ISON.