Results 21 to 30 of about 169 (153)
Destruction mechanisms for interstellar dust
The Astrophysical Journal, 1979 Destruction rates are estimated for interstellar dust grains as a function of size and composition of the grains, and the type of region in which the grain is located. Several idealized models of the interstellar medium are considered. The destruction mechanisms examined include sputtering and grain-grain collisions in interstellar shocks, sputtering ...
B. T. Draine, E. E. Salpeter
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Dust destruction by the reverse shock in the Cassiopeia A supernova remnant [PDF]
Astronomy & Astrophysics, 2016 Core collapse supernovae (CCSNe) are important sources of interstellar dust, potentially capable of producing one solar mass of dust in their explosively expelled ejecta. However, unlike other dust sources, the dust has to survive the passage of the reverse shock, generated by the interaction of the supernova blast wave with its surrounding medium ...
Micelotta, Elisabetta R. +2 more
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The destruction and survival of dust in the shell around SN 2008S [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 SN 2008S erupted in early 2008 in the grand design spiral galaxy NGC 6946. The progenitor was detected by Prieto et al. in Spitzer Space Telescope images taken over the four years prior to the explosion, but was not detected in deep optical images, from which they inferred a self-obscured object with a mass of about 10 Msun.
Wesson, R +10 more
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Examining the evidence for dust destruction in GRB 980703 [PDF]
Astronomy & Astrophysics, 2008 6 pages, 4 figures, accepted for publication in A& ...
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Restructuring and destruction of hydrocarbon dust in the interstellar medium [PDF]
Astronomy Reports, 2016 A model of key processes influencing the evolution of a hydrocarbon grain of an arbitrary size under astrophysical conditions corresponding to ionized hydrogen regions (HII regions) and supernova remnants is presented. The considered processes include aromatization and photodestruction, sputtering by electrons and ions, and shattering due to collisions
Murga, M. S. +2 more
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Formation and destruction of dust grains in circumstellar regions [PDF]
Symposium - International Astronomical Union, 1987 The existence of circumstellar dust in late-type stars is connected with stellar pulsations since periodic shocks accompanying pulsations seem to be the most probable mechanism of the gas density increase needed for condensation of dust particles in outer layers of the stellar atmosphere.
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Dust Destruction by Drift-induced Sputtering in Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2020 Abstract Recent mid-infrared high spatial resolution observations have revealed that active galactic nuclei (AGNs) may host a polar dust region with the size of several pc, and such dust may be carried by radiation from the central engine. The polar dust emission often exhibits very weak or absence of the silicate 10 μm emission feature.
Ryo Tazaki, Kohei Ichikawa
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Dust Destruction in the Cygnus Loop Supernova Remnant [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractThe Cygnus Loop supernova remnant serves as an excellent laboratory for the study of radiative and non-radiative shocks with speeds in the 150–450 km s−1 range. We present results on shock-excited emission and dust destruction based on Spitzer Space Telescope observations of two well-studied regions in the remnant, (i) a non-radiative shock ...
Ravi Sankrit +3 more
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective This study aimed to investigate the immunological response to influenza vaccination, the incidence and severity of influenza infection, and the side effects of the vaccination in patients with ischemic stroke. Methods This prospective observational study was conducted between 2023 and 2024 at Ramathibodi Hospital.
Achiraya Pakngao +5 more
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Advanced Engineering Materials, EarlyView.The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi +3 more
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