CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1

Details CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1 CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..186..178w&link_type=abstract

Icarus, Volume 186, Issue 1, p. 178-191.

Computer Science

1

Scientific paper

The results of the multiaperture photometry of Comet Shoemaker Levy 1991 T2 in the pre-perihelion and P/deVico in the post-perihelion period with the narrowband CN, C2 and Blue Continuum (BC) IHW filters are presented. A Haser model of the molecular coma was used for the determination of the parent and daughter scale-lengths and production rates of the radicals. The comets showed some substantial differences between their parent scale-lengths. The CN parent scale-length (at 1.0 AU) was 16×10 km for Comet Shoemaker Levy and 39×10 for P/deVico, the C2 parent scale-lengths were respectively 29×10 and 54×10 km. Such divergences could be interpreted in the frame of different scenarios of emission of cometary parents, either from a nucleus or from a volume source. The daughter scale-lengths for these comets were quite similar, namely: 306×10 and 318×10 km for CN and 69×10 and 66×10 km for C2. We determined the Afρ parameter for apertures of different radii. A Monte Carlo model of the dust coma was used to obtain the dust ejection velocity. It was of the order of 0.1 km s-1 for both comets. The power index of the distribution of the β-parameter of dust particles (ratio of light pressure to the solar gravitation) was of the order of 3 for C/Shoemaker Levy and close to 2 for P/deVico. The dependence on heliocentric distance (r) of the radical and dust production rates for P/deVico in the range of 0.7 1.0 AU was described by the power law function rh-α with a power index equal to: 5.55±0.14 for CN, 5.70±0.24 for C2 and 5.22±0.19 for dust. Relative abundances of the dynamically new Comet Shoemaker Levy and short-period P/deVico were quite similar with an enhancement of C2 comparing with standard values taken from A'Hearn et al. (1995).

Affiliated with

Also associated with

No associations

Rating

CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CN, C2 radicals and dust in Comets Shoemaker Levy 1991 T2 and P/deVico 1995 S1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1256009