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Interstellar dust grains exhibit complex dynamics which is essential for understanding many key interstellar processes that involve dust, including grain alignment, grain growth, grain shattering etc. Grain rotational and translational…

Astrophysics · Physics 2007-05-23 A. Lazarian , Huirong Yan

Large-scale vortices in protoplanetary disks are thought to form and survive for long periods of time. Hence, they can significantly change the global disk evolution and particularly the distribution of the solid particles embedded in the…

Earth and Planetary Astrophysics · Physics 2017-09-20 P. Barge , L. Ricci , C. L. Carilli , R. Previn-Ratnasingam

Observations of cosmic microwave background in the range 10-90 GHz have revealed an anomalous foreground component well correlated with 12 \mum, 60 \mum and 100 \mum emission from interstellar dust. As the recent cross-correlation analysis…

Astrophysics · Physics 2007-05-23 A. Lazarian

Context. Excess microwave emission, commonly known as anomalous microwave emission (AME), is now routinely detected in the Milky Way. Although its link with the rotation of interstellar (carbonaceous) nano-grains seems to be relatively well…

Astrophysics of Galaxies · Physics 2022-07-20 Nathalie Ysard , Marc-Antoine Miville-Deschênes , Laurent Verstraete , Anthony Peter Jones

The excess emission seen in spectral energy distributions (SEDs) is commonly used to infer the properties of the emitting circumstellar dust in protoplanetary and debris discs. Most notably, dust size distributions and details of the…

Earth and Planetary Astrophysics · Physics 2020-09-16 Torsten Löhne

In order to interpret observations influenced by dust and to perform detailed modeling of the observable characteristics of dust-producing or dust-containing objects, knowledge of the micro-physical properties of relevant dust species are…

Astrophysics of Galaxies · Physics 2012-01-20 Anja C. Andersen

Dust particle impacts on the Wind spacecraft were detected with its plasma wave instrument Wind/WAVES. Frequency analysis on this dust impact time series revealed spectral peaks indicative of a solar rotation signature. We investigated…

Mid-infrared arcs of dust emission are often seen near ionizing stars within HII regions. A possible explanations for these arcs is that they could show the outer edges of asymmetric stellar wind bubbles. We use two-dimensional,…

Observations of the cosmic microwave background have revealed a component of 10-60 GHz emission from the Galaxy which correlates with 100-140um emission from interstellar dust but has an intensity much greater than expected for the…

Astrophysics · Physics 2007-05-23 B. T. Draine , A. Lazarian

Our current understanding of interstellar dust is summarized at an introductory level. Submicron-sized interstellar dust grains absorb and scatter light, and reradiate the absorbed energy in the infrared. The grain population spans a range…

Astrophysics · Physics 2009-10-31 B. T. Draine

During the past five years, the Spitzer Space Telescope and improved ground-based facilities have enabled a huge increase in the number of circumstellar disks, around young stars of Solar mass or smaller, in which the composition of the…

Solar and Stellar Astrophysics · Physics 2009-02-17 Dan M. Watson

Meteoroids originating from the local interstellar medium, traverse the solar system. This has been proven by in situ measurements by interplanetary spacecraft as well as highly sensitive radar measurements. Early attempts to detect…

Astrophysics · Physics 2007-05-23 M. Landgraf

Debris dust in the habitable zones of stars - otherwise known as exozodiacal dust - comes from extrasolar asteroids and comets and is thus an expected part of a planetary system. Background flux from the Solar System's zodiacal dust and the…

Over the last decade, precise exoplanet transmission spectroscopy has revealed the atmospheres of dozens of exoplanets, driven largely by observatories like the Hubble Space Telescope. One major discovery has been the ubiquity of…

ALMA continuum observations of thermal emission from the dust component of protoplanetary disks have revealed an abundance of substructures that may be interpreted as evidence for embedded planets, but planet-driven spiral arms -- perhaps…

Earth and Planetary Astrophysics · Physics 2022-05-18 Jessica Speedie , Richard A. Booth , Ruobing Dong

The Ulysses spacecraft has been orbiting the Sun on a highly inclined ellipse almost perpendicular to the ecliptic plane (inclination 79 deg, perihelion distance 1.3 AU, aphelion distance 5.4 AU) since it encountered Jupiter in 1992. The…

Astrophysics · Physics 2009-11-13 Harald Krueger , Markus Landgraf , Nicolas Altobelli , Eberhard Gruen

High-resolution mid-infrared observations of astrospheres show that many of them have filamentary (cirrus-like) structure. Using numerical models of dust dynamics in astrospheres, we suggest that their filamentary structure might be related…

Solar and Stellar Astrophysics · Physics 2016-12-28 Olga Katushkina , Dmitry Alexashov , Vladislav Izmodenov , Vasilii Gvaramadze

We investigate the dynamics of charged dust close to outer mean-motion resonances with planet Jupiter. The importance of the interplanetary magnetic field on the orbital evolution of dust is clearly demonstrated. New dynamical phenomena are…

Earth and Planetary Astrophysics · Physics 2019-11-11 Christoph Lhotka , Catalin Gales

Emission of dust up to a few micrometer in size by impacts of sand grains during saltation is thought to be one source of dust within the Martian atmosphere. To study this dust fraction, we carried out laboratory impact experiments. Small…

Earth and Planetary Astrophysics · Physics 2022-09-01 Tim Becker , Jens Teiser , Teresa Jardiel , Marco Peiteado , Olga Munoz , Julia Martikainen , Juan Carlos Gomez Martin , Gerhard Wurm

Long-baseline interferometry at infrared wavelengths allows the innermost regions around young stars to be observed. These observations directly probe the location of the dust and gas in the disks. The characteristic sizes of these regions…

Solar and Stellar Astrophysics · Physics 2014-11-18 Fabien Malbet