Reference : The Dusty View of DI from ESO Chile
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/24240
The Dusty View of DI from ESO Chile
English
Boehnhardt, H. [MPI for Solar System Research]
Ageorges, N. [European Southern Observatory, Santiago de Chile]
Bagnulo, S. [European Southern Observatory, Santiago de Chile]
Barrera, L. [Universidad Metropolitana de Ciencias y de la Educacion, Santiago de Chile]
Bonev, T. [Astronomical Institute of the Bulgarian Academy of Sciences]
Hainaut, O. [European Southern Observatory, Santiago de Chile]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Käufl, H. U. [European Southern Observatory]
Kerber, F. [European Southern Observatory]
Locurto, G. [European Southern Observatory, Santiago de Chile]
Manfroid, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)]
Marco, O. [European Southern Observatory, Santiago de Chile]
Pantin, E. [CEA Saclay]
Pompei, E. [European Southern Observatory, Santiago de Chile]
Rauer, H. [Deutsche Agentur für Luft- und Raumfahrt]
Saviane, I. [European Southern Observatory, Santiago de Chile]
Selman, F. [European Southern Observatory, Santiago de Chile]
Sterken, C. [Free University of Brussel]
Tozzi, G. P. [INAF Arcetri Observatory]
Weiler, M. [Deutsche Agentur für Luft- und Raumfahrt]
Sterken, C. [> > > >]
2009
Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength
Käufk, H. U.
Sterken, C.
Springer-Verlag
ESO ASTROPHYSICS SYMPOSIA
147
Yes
No
International
978-3-540-76958-3
Heidelberg
Germany
Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength
7-10 August 2006
Käufl H.U. and Sterken C.
Brussels
Belgium
[en] Around the time of the impact of NASA's Deep Impact (DI) mission at comet 9P/Tempel 1, in total 6 telescopes with altogether 7 different instruments, located at the La Silla (LSO) and Paranal (VLT) Observatories of the European Southern Observatory (ESO) in Chile, were used to characterize the dust properties before and after the event. The ejecta cloud expanded at an average speed of about 200 ms[SUP]-1[/SUP]during the first hours after the event. It reached stagnation distance of 25000 km about 3 days after impact. The pre-impact dust jet and fan activity (`porcupine' pattern) remained undisturbed after impact. In our measurements the jet activity can be traced to a few 100 km nucleus distance. In total 9 comastructures are identified which may originate from at least 4 regions of enhanced dust emission on the nucleus - one of this region may in fact be multiple. No obvious signatures of a new active region created by DI are found. The overall dust production during the impact compares to about 5-10 h of normal activity. The global expansion geometry of the DI cloud is compatible with a majority of dust grains in the micron size range. Indications exist for asymmetric brightness and colour distributions of the dust in the ejecta cloud. The dust temperature rose from about 280-290 K before to 330 K one day after the event and fell to pre-impact level the day thereafter. The dust reflected sunlight was found to be linearly polarized at about 7.5% in the visible and near-IR, at constant level within about 4000 km from the nucleus. No circular polarization of the dust is detected.
Researchers ; Students
http://hdl.handle.net/2268/24240
also: http://hdl.handle.net/2268/108064
10.1007/978-3-540-76959-0_19
http://adsabs.harvard.edu/abs/2009diwo.conf..147B

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