SOHO Observations of the Perihelion Passage Comet C/2002 V1 NEAT

Details SOHO Observations of the Perihelion Passage Comet C/2002 V1 NEAT SOHO Observations of the Perihelion Passage Comet C/2002 V1 NEAT

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21b0161h&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH21B-0161

Physics

2134 Interplanetary Magnetic Fields, 6025 Interactions With Solar Wind Plasma And Fields, 6061 Remote Sensing, 7509 Corona, 7513 Coronal Mass Ejections

Scientific paper

During mid-February the Comet C/2002 V1 (NEAT) passed through the field-of-view of the LASCO C3 coronagraph on SOHO. The comet passed within 0.1 AU (about 20 solar radii) and displayed complex dust and ion tails. The comet exhibited the brightest and largest SOHO dust tail to date, with a peak gas production rate similar to the huge rates calculated for C/1995 O1 Hale-Bopp and 96P/Machholz 1 at perihelion. Additionally, a coronal mass ejection may have crossed the comet's tail at about the time the comet was predicted to cross the heliospheric current sheet, and this may have been responsible for splitting the ion tail. We discuss these observations and consider likely physical mechanisms such as: solar wind charging of the dust by the CME ion burden, dust disruption or dust emission enhancement. We also compare solar wind speeds derived from the ion tail measurements with theoretical values.

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