Dust grains fall from Saturn’s D-ring into its equatorial upper atmosphere
نویسندگان
چکیده
منابع مشابه
Diffuse Galactic Emission from Spinning Dust Grains
Spinning interstellar dust grains produce detectable rotational emission in the 10-100 GHz frequency range. We calculate the emission spectrum, and show that this emission can account for the " anomalous " Galactic background component which correlates with 100 µm thermal emission from dust. Implications for cosmic background studies are discussed.
متن کاملElectric Dipole Radiation from Spinning Dust Grains
We discuss the rotational excitation of small interstellar grains and the resulting electric dipole radiation from spinning dust. Attention is given to excitation and damping of grain rotation by: collisions with neutrals; collisions with ions; “plasma drag”; emission of infrared radiation; emission of electric dipole radiation; photoelectric emission; and formation of H2 on the grain surface. ...
متن کاملGalactic Emission from Spinning Dust Grains
Spinning interstellar dust grains produce detectable rotational emission in the 10-100 GHz frequency range. We calculate the emission spectrum, and show that this emission can account for the " anomalous " Galactic background component which correlates with 100 µm thermal emission from dust. Implications for cosmic background studies are discussed.
متن کاملMicrowave Emission from Galactic Dust Grains
Observations of the cosmic microwave background have revealed a component of 10–60 GHz emission from the Galaxy which correlates with 100–140μm emission from interstellar dust but has an intensity much greater than expected for the low-frequency tail of the “electric dipole vibrational” emission peaking at ∼130μm. This “anomalous emission” is more than can be accounted for by dust-correlated fr...
متن کاملMagnetic Dipole Microwave Emission from Dust Grains
Thermal fluctuations in the magnetization of interstellar grains will produce magnetic dipole emission at ν ∼< 100 GHz. We show how to calculate absorption and emission from small particles composed of material with magnetic as well as dielectric properties. The Kramers-Kronig relations for a dusty medium are generalized to include the possibility of magnetic grains. The magnetic permeability a...
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ژورنال
عنوان ژورنال: Science
سال: 2018
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aat2236