Other
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002icar..157..323b&link_type=abstract
Icarus, Volume 157, Issue 2, p. 323-348.
Other
28
Scientific paper
The Kreutz sungrazing family of comets is unique because of its small perihelion distance and because of the large number of known members of this family. SOHO/LASCO coronagraph observations beginning in 1996 have revealed an unprecedented number of Kreutz comets. These new coronagraph observations improve upon earlier observations because of a larger field-of-view, increased image cadence, and better photometric measurements. This paper presents the lightcurves of the 141 Kreutz family comets observed from 1996 through 1998. Throughout this period, the number of family members discovered each year is shown to be constant. None of the comets were detected postperihelion. The lightcurves show distinctive characteristics which reveal much about the properties of the nuclei. It is shown that the individual fragments can be related to one of two ``standard candles,'' which we call Universal Curves. The comets all reach a peak brightness at one of two characteristic distances (both near 12 Rsolar) and that the comets fragment at another characteristic distance (about 7 Rsolar). Also, evidence is seen for line emission, which varies with heliocentric distance.
Biesecker Doug A.
Cyr Orville Chris St.
Howard Russ A.
Lamy Philippe
Llebaria Antoine
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