Berlin 2014 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 5: Postersitzung

EP 5.21: Poster

Tuesday, March 18, 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.