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Title:
Interplanetary gas. XXV - A solar wind and interplanetary magnetic field interpretation of cometary light outbursts
Authors:
Niedner, M. B., Jr.
Affiliation:
AA(NASA, Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Greenbelt; Systems and Applied Sciences Corp., Riverdale, Md.)
Publication:
Astrophysical Journal, Part 1, vol. 241, Oct. 15, 1980, p. 820-829. (ApJ Homepage)
Publication Date:
10/1980
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COMETS, FLARES, INTERPLANETARY MAGNETIC FIELDS, INTERPLANETARY MEDIUM, SOLAR WIND, BRIGHTNESS, COMET HEADS, COMET TAILS, EXOTHERMIC REACTIONS
Comment:
A&AA ID. AAA028.102.029
DOI:
10.1086/158393
Bibliographic Code:
1980ApJ...241..820N

Abstract

Possible relationships of cometary brightness outbursts with the solar wind and interplanetary magnetic field are examined. Two types of outburst are distinguished: those which involve a significant brightening of both the head and the tail in a comet with a conspicuous plasma tail (Class I), and those involving the brightening of the central condensation of a previously faint comet with no detectable plasma tail (Class II). Class I bursts, as exemplified by Comet Morehouse 1908c, are attributed to the generation in the head of enhanced amounts of ions and their injection into the tail shortly before it disconnects, with ionization provided by sector boundary crossings. Class II events, as exhibited by Comet P/Tuttle-Giacobini-Kresak 1973b, are interpreted as the result of the bombardment of the nucleus by disturbed solar wind near corotated high-speed streams and sector boundaries, leading to highly exothermic chemical reactions.

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