elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Post-perihelion monitoring of comet Hale-Bopp at ESO

Boehnhardt, H. und Bonfils, X. und Petit, Y. und Hainaut, O. und Delahodde, C. und Jorda, L. und Rauer, H. und Colas, F. und Manfroid, J. und Marchis, F. und Schulz, R. und Tanabe, R. und Tozzi, G.P. (2002) Post-perihelion monitoring of comet Hale-Bopp at ESO. In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany, 500, Seiten 613-616. ESA. Asteroids, Comets, Meteors – ACM 2002, Berlin, Gernany, 29 July - 2 August 2002. ISBN 92-9092-810-7.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

The post-perihelion coma activity of Comet C/1995 O1 Hale-Bopp is monitored at ESO telescopes in La Silla and Paranal since Sept. 1997. Imaging through broadband filters in the visible and near-IR wavelength ranges allows to investigate the evolution of the dust coma, namely the appearance of jets, fans, shells and clouds. Long-term evolution: the comet had a porcupine-like embedded fan coma in autumn 1997 that evolved into a northern fan plus shell pattern in 1998 and remains like this since. Thus, the evolution of the coma structure post-perihelion was similar to that pre-perihelion at about the same heliocentric distances, but is occurred in reversed order. This long-term evolution can be characterized by quasi-continuous dust emission from a few (minimum 4) active regions (producing the fan structures) on the nucleus that is modulated by occasional, repetitive and short-term activity increases (generating shell features in the coma). Outbursts: a number of outbursts and unusual activity patterns occurred in the coma of the comet post-perihelion that are documented through the appearance of complex "palm-tree-like" structures of temporary nature in association with outbursts in the visual lightcurve of the comet and a series of 3 dust clouds resembling "mini-comets" and passing through the northern coma at projected velocities of 30-50m/s. The similarity of coma patterns and cometary viewing geometry from Earth before and after perihelion suggests that some nuclear regions had enhanced long-term activity, possibly driven by super-volatile ices at larger (>10AU) heliocentric distances and that the orientation of the rotation axis of the nucleus did not change much over the past 7 years.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=2003,
Titel:Post-perihelion monitoring of comet Hale-Bopp at ESO
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Boehnhardt, H.European Southern Observatory ESO, Santiago de Chile
Bonfils, X.European Southern Observatory ESO, Santiago de Chile
Petit, Y.European Southern Observatory ESO, Santiago de Chile
Hainaut, O.European Southern Observatory ESO, Santiago de Chile
Delahodde, C.INSU Astrophysical Laboratiry, Marseille, France
Jorda, L.INSU Astrophysical Laboratiry, Marseille, France
Rauer, H.NICHT SPEZIFIZIERT
Colas, F.Observatoire de Paris-Meudon, Meudon, France
Manfroid, J.University Liege, Institute for Astrophysics and Geophysics, Plainevaux, Belgium
Marchis, F.University of Berkeley, Department of Astronomy, Berkeley, USA
Schulz, R.ESTEC, Noordwijk, The Netherlands
Tanabe, R.National Astronomical Observatory, Mitaka, Tokyo, Japan
Tozzi, G.P.Osservatorio Astrofisico di Arcetri, Firenze, Italy
Datum:2002
Erschienen in:Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany
Band:500
Seitenbereich:Seiten 613-616
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Warmbein, B.NICHT SPEZIFIZIERT
Verlag:ESA
Name der Reihe:ESA SP
ISBN:92-9092-810-7
Status:veröffentlicht
Veranstaltungstitel:Asteroids, Comets, Meteors – ACM 2002, Berlin, Gernany, 29 July - 2 August 2002
Veranstalter :ESA
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Weltraumsensorik und Planetenerkundung
Hinterlegt von: Susanne Pieth
Hinterlegt am:08 Dez 2005
Letzte Änderung:14 Jan 2010 19:26

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.