Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201..362f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 2, Aug. 1988, p. 362-372. CNR-supported research.
Astronomy and Astrophysics
Astrophysics
13
Astronomical Photometry, Comet Tails, Halley'S Comet, Interplanetary Dust, Charge Coupled Devices, Image Analysis, Particle Size Distribution, Velocity Distribution
Scientific paper
This work concerns the photometric analysis of 10 wide-field CCD images (702 nm and RG830 filters) of comet P/Halley taken at ESO between 24-2 and 5-4-1986. The isophote maps were used as input for the inverse approach to the Finson-Probstein method for interpreting cometary dust tails. This application yields: the ejection velocity of the dust from the inner coma; the time-dependent dust size distribution and its time-average; the dust mass and number production rates. The available data allow to estimate the error affecting the solution (≈50%). The results concern particles of sizes between 0.7 and 300 μm ejected in the period between 15-1 and 15-3-1986. The long-term trend of the dust production rate of comet Halley, which is the surest result of this work, is very close to that of long period comet Bennett 1970 II.
Barbieri Carlo
Cremonese Gabriele
Fulle Marco
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