Results 21 to 30 of about 10,339 (261)
Physical Properties of the Interplanetary Dust [PDF]
International Astronomical Union Colloquium, 1971 The interplanetary dust may be composed of cometary material, interstellar grains, debris from asteroidal collisions, primordial material formed by direct condensation, or contributions from all of these sources. Before we can determine the origin of the dust, we need to know its physical nature, spatial distribution, and the dynamical forces that act ...
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PHYSICAL PROPERTIES OF LUMINOUS DUST-POOR QUASARS [PDF]
The Astrophysical Journal, 2013 We identify and characterize a population of luminous dust poor quasars at 06 previously. This class of active galactic nuclei has been known to show little IR emission from a dusty structure, but is yet poorly understood in terms of number evolution or of dependence on physical quantities.
Jun, Hyunsung David, Im, Myungshin
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The Astrophysical Journal, 2023 We present a new model of interstellar dust in which large grains are a single composite material, “astrodust,” and nanoparticle-sized grains come in distinct varieties including polycyclic aromatic hydrocarbons (PAHs). We argue that a single-composition
Brandon S. Hensley, B. T. Draine
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A review of nanoparticle decharging in atmospheric pressure plasma afterglows
Frontiers in Physics, 2022 Plasma afterglows interacting with dust grains present a dynamic environment in which negatively charged dust grains leaving the plasma bulk experience an environment with plasma conditions transient in space and time.
T.J.A. Staps , T.J.A. Staps
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Journal of Low Frequency Noise, Vibration and Active Control, 2019 Ultralow-frequency dust acoustic waves in plasma are an important branch of study in plasma physics. Due to the important application of dust acoustic waves in the space environment, industrial processing, and the laboratory, they have aroused great ...
Junchao Sun, Lei Fu, Hongwei Yang
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Investigation of Dust Grains by Optical Tweezers for Space Applications
The Astrophysical Journal, 2022 Cosmic dust plays a dominant role in the universe, especially in the formation of stars and planetary systems. Furthermore, the surface of cosmic dust grains is the benchwork where molecular hydrogen and simple organic compounds are formed. We manipulate
A. Magazzù +13 more
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Physical Processes on Circumplanetary Dust [PDF]
International Astronomical Union Colloquium, 1991 Abstract The life cycles of grains in circumplanetary space are governed by various physical processes that alter sizes and modify orbits. Lifetimes are quite short, perhaps 102-104 years for typical circumplanetary grains of 1 micron radius. Thus particles must be continually supplied to the circumplanetary complex, probably by the grinding down of
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Updating the Electrostatic Model for Dust Impact Detection with Antenna Instruments
The Astrophysical JournalAntenna instruments deployed in space are known to be sensitive to dust impacts, and the detected signals can be used to characterize the dust populations within the solar system.
Austin Matheus Smith +4 more
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Molecular Oncology, EarlyView.Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang +12 more
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Crystallization of Amorphous Olivine: Why Is It Faster with Iron?
The Astrophysical JournalOlivine is one of the most abundant silicate minerals in cosmic environments, occurring largely in amorphous form in the interstellar medium before crystallizing within protoplanetary disks.
Patrick Cordier +12 more
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