Dust Morphology Of Comet Hale-Bopp (C/1995 O1). Ii. Introduction Of A Working Model View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-07

AUTHORS

S. Sekanina, H. Boehnhardt

ABSTRACT

A Monte Carlo image simulation code for dust features in comets is applied to comet Hale-Bopp in order to model the object's persistent porcupine-like appearance on high-resolution images taken between May 11 and Nov. 2, 1996. A self-consistent fan model is proposed, with six isolated sources of dust emission assumed at various locations on the surface of the rotating nucleus and with the spin axis undergoing a complex motion in an inertial coordinate system. In the framework of this model, jet pairs represent boundaries of fan-shaped formations described by dust ejected from isolated sources during periods of time when the Sun is above the local horizon. The spin axis is found to have traveled through a field of 10° by 20° during the examined period of nearly six months. Still more successful is a fan model with large diurnal dust-emission fluctuations, which is consistent with an inertially fixed position of the spin axis and requires only three discrete sources. In this scenario, the dust-emission profile is dominated by several brief flare-ups, or “puffs”, in the production of dust from one of the sources. The results are insensitive to the spin rate, but the observed dust coma appearance is more typical of a rapidly rotating comet. More... »

PAGES

313-319

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1006286024437

DOI

http://dx.doi.org/10.1023/a:1006286024437

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1010875095


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