An orbital inhomogenity of new comets and the fading problem

Details An orbital inhomogenity of new comets and the fading problem An orbital inhomogenity of new comets and the fading problem

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006coska..36....5n&link_type=abstract

Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 36, no. 1, p. 5-14.

Astronomy and Astrophysics

Astronomy

2

Long-Period Comets, Oort Cloud, Fading Problem, Planetary Perturbations

Scientific paper

We answer the question, if a certain orbital inhomogenity of new comets coming to the zone of visibility from the Oort cloud, which was found by Neslušan & Jakubík in 2005 within a new model of the outer part of this comet reservoir, can influence the distribution of the reciprocal semi-major axis, 1/a, of long-period comets and, eventually, account for the fading problem. Our conclusion is that the inhomogenity has practically no influence on the 1/a distribution. The fading problem persists actual. According to our simulations, the theoretical 1/a distribution contains about 20 times more old comets (with 1/a > 1 × 10-4 AU-1) than are actually observed. The magnitude of the 1/a change due to the investigated Jupiter and Saturn perturbations is randomly distributed and can be described by the Gaussian function 0.0074 exp[-(1/a)2/2/(5.2 × 10-4)2], when the total area under the curve is gauged to be unity.

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