Fabry-Perot Observations of Comet Hale-Bopp H_2O(+) Velocity Fields

Details Fabry-Perot Observations of Comet Hale-Bopp H_2O(+) Velocity Fields Fabry-Perot Observations of Comet Hale-Bopp H_2O(+) Velocity Fields

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997dps....29.3723r&link_type=abstract

American Astronomical Society, DPS meeting #29, #37.23; Bulletin of the American Astronomical Society, Vol. 29, p.1051

Astronomy and Astrophysics

Astronomy

Scientific paper

We have obtained Doppler-sliced images of H_2O(+) emission from Comet Hale-Bopp, using a 15-cm, dual-etalon, Fabry-Perot/CCD imaging spectrometer at the McMath-Pierce 0.8-meter west auxiliary telescope of the National Solar Observatory on Kitt Peak. The 6-arcmin field of view was centered on the comet nucleus, and the spectral resolution was 0.4 Angstroms (20km/sec). The observations consisted of ``data cubes,'' i.e., a sequence of images of the 6158 Angstroms emission doublet at velocity steps of 12.5 or 25km/sec, covering a range from -75km/sec to +75km/sec in the comet reference frame. We were able to follow the comet for 1 to 1(1/_2) hours each clear night. We obtained useable data cubes on at least ten nights between February 25 and April 16. These data are being examined to investigate the comet-solar wind interaction. We will present both still images and time-lapse movies showing sequences of ion velocities and accelerations on the plane of the sky.

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