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The Dust Environment of Short Period Comets

Authors: Pozuelos Romero, Francisco José;

The Dust Environment of Short Period Comets

Abstract

In this work we present a characterization of the dust environment of various Short Period Comets, with the purpose to improve the knowledge on their physical properties. Among this comet family members, we focused over 30P/Reinmuth 1, 78P/Gehrels 2, 123P/West-Hartley and P/2011 W2 (Rinner). We analyze CCD imaging observations during the last three years in Sierra Nevada Observatory (OSN), and perform a Monte Carlo dust tail analysis in order to retrieve the dust environment that best fits the observations. The dust parameters that we obtain are the mass lost rate, ejection terminal velocities, size distributions, and ejection morphology. In addition, we derive from the models the Afρ curves as a function of the heliocentric distance and compare them with the ones provided by the astronomical association Cometas-Obs during the passage of these objects at dates close to perihelion. Three of the comets studied, 78P, 123P, and Rinner, can be accurately fitted by an isotropic ejection model. However, for 30P, an anisotropic ejection model is required, with active areas on the surface located between latitudes -30° to +30°. From our study we derive that 78P/Gehrels 2 is the most active comet at perihelion, with a dust production rate of Qd= 550 kg/s, larger than the average of this comet family. The others three targets show a moderate dust loss rate.

Country
Belgium
Keywords

Aérospatiale, astronomie & astrophysique, Physical, chemical, mathematical & earth Sciences, Physique, chimie, mathématiques & sciences de la terre, Space science, astronomy & astrophysics, comets, solar system

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green