On Cometary Dust and Gas Dynamics
نویسندگان
چکیده
منابع مشابه
Motion of Cometary Dust
On timescales of days to months, the motion of cometary dust is mainly affected by solar radiation pressure, which determines dust dynamics according to the particle-scattering crosssection. Within this scenario, the motion of the dust creates structures referred to as dust tails. Tail photometry, depending on the dust cross-section, allows us to infer from model runs the best available outputs...
متن کاملOrganic matter in comets and cometary dust.
Comets are primitive conglomerates of the solar system containing a mixture of frozen gases, refractory grains, and carbonaceous particles rich in biogenic elements. The dramatic display of comets is mostly caused by a cloud of micrometer-sized dust particles that leave the comet nucleus when frozen gases sublimate as they approach the Sun. Analyses of cometary dust captured in the stratosphere...
متن کاملScattering Properties and Composition of Cometary Dust
Composition of the Comet dust obtained by the dust impact analyzer on the Halley probes indicated that the comet dust is a mixture of silicate and carbonaceous material. The collected interplanetary dust particles (IDP’s) are fluffy and composite, having grains of several different types stuck together. Using Discrete Dipole Approximation (DDA) we study the scattering properties of composite gr...
متن کاملOn the effect of gas drag on the dust dynamics
We investigate in this paper the effect of gas drag on the dynamics of the dust particles in the edge-on β Pictoris disc in order to derive an upper limit on the mass of gas in this system. Our study is motivated by the large uncertainties on the amount of gas in the β Pictoris disc currently found in the literature. The dust particles are assumed to originate from a colliding annulus of planet...
متن کاملWorkshop on Cometary Dust in Astrophysics ( 2003 ) 6023 . pdf
Introduction: Dust is the basic building block of all larger bodies formed in the Solar System: planets, their satellites, comets and asteroids. Some of these dust grains have survived 4.56 Gyr of processing, and occur as interplanetary dust particles (IDPs), GEMS (Glass with embedded sulphides) within IDPs and presolar grains in meteorites. Primitive meteorites can also be regarded as aggregat...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1983
ISSN: 1539-2996
DOI: 10.1017/s1539299600005864