Using Imaging of Multiple Outbursts to Investigate the Behavior and Nucleus Properties of Comet 29P/Schwassmann-Wachmann 1

Details Using Imaging of Multiple Outbursts to Investigate the Behavior and Nucleus Properties of Comet 29P/Schwassmann-Wachmann 1 Using Imaging of Multiple Outbursts to Investigate the Behavior and Nucleus Properties of Comet 29P/Schwassmann-Wachmann 1

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2825f&link_type=abstract

American Astronomical Society, DPS meeting #42, #28.25; Bulletin of the American Astronomical Society, Vol. 42, p.964

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We present an analysis of the dynamic dust coma of comet 29P/Schwassmann-Wachmann 1 (SW1), a comet with a long record of observed outbursts. We have obtained R-band CCD imaging of SW1's dust coma in 2002, 2003, 2005, 2008, and 2010, and at every epoch, the comet was fortuitously in outburst, showing dust jets, spirals, and/or shells. This gives us a significant and growing database of these events with which we can study properties of SW1's dust and nucleus, and their time evolution. As an outburst evolves, our data show that the near-nucleus dust brightness and dust morphology change on daily and weekly timescales. Moreover, not all outbursts have the same strength; in particular our 2010 imaging shows evidence of a mini-outburst of shorter duration and smaller magnitude than the others. In this presentation we will follow up earlier analyses of the dust coma [1,2], and we will present preliminary results from modeling the dust seen in specific outbursts. We are using a Monte Carlo dust model [3] that reproduces the features seen in the coma and thereby constrains properties such as outburst timing, spin state, and source regions. References: [1] Ellis, C.E., et al. 2004, BAAS 36, 1146. [2] Fernandez, Y.R., et al. 2008, IAUC 8991. [3] Samarasinha 2000, ApJ 529, L107.

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