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Session 8 - Planets and Comets.
Display session, Monday, June 08
Interferometric observations of Comet Hale-Bopp were conducted with the Berkeley-Illinois-Maryland Association (BIMA) millimeter array in March and April of 1997. Nine antennas were used to detect HCN J=1\rightarrow0 emission at 88.6 GHz with approximate angular resolution of 9^\prime\prime. Prior to comet Hale-Bopp, spectral line detections at millimeter wavelengths were restricted to single element telescopes. Consequently, this comet is the first to be imaged with relatively high resolution at 3 mm. We have examined several days of HCN maps in order to explore the deviation of the detected emission from that expected for a spherically symmetric nuclear source. To this end, we have created model images to represent what would have been mapped had the comet actually been a spherically symmetric nuclear source. These model images were then subtracted from the corresponding observed images, resulting in a set of HCN ``difference maps''. These difference maps are displayed and their structures discussed.
Program listing for Monday