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High rate sampling detectors measuring the potential difference between the main body and boom antennas of interplanetary spacecraft have been shown to be efficient means to measure the voltage pulses induced by nano dust impacts on the…

地球与行星天体物理 · 物理学 2012-05-10 Filippo Pantellini , Soraya Belheouane , Nicole Meyer-Vernet , Arnaud Zaslavsky

Spinning dust grains in front of the bright Galactic synchrotron background can produce a weak absorption signal that could affect measurements of high redshift 21 cm absorption. At frequencies near 80 MHz where the EDGES experiment has…

星系天体物理 · 物理学 2018-05-08 B. T. Draine , Jordi Miralda-Escudé

We observed Jupiter at wavelengths near 2 cm with the Karl G. Jansky Very Large Array in February 2015. These frequencies are mostly sensitive to variations in ammonia abundance and probe between ~0.5-2.0 bars of pressure in Jupiter's…

地球与行星天体物理 · 物理学 2017-01-23 Richard Cosentino , Bryan Butler , Bob Sault , Raul Morales-Juberias , Amy Simon , Imke de Pater

We investigate the clustering and dynamics of nano-sized particles (nano-dust) in high-resolution ($1024^3$) simulations of compressible isothermal hydrodynamic turbulence. It is well-established that large grains will decouple from a…

星系天体物理 · 物理学 2020-01-08 Lars Mattsson , Johan. P. U. Fynbo , Beatriz. Villarroel

Tenuous dust clouds of Jupiter's Galilean moons Io, Europa, Ganymede and Callisto have been detected with the in-situ dust detector on board the Galileo spacecraft. The majority of the dust particles have been sensed at altitudes below five…

天体物理学 · 物理学 2007-05-23 Harald~Krüger , Alexander V. Krivov , Miodrag Sremčević , Eberhard Grün

Future direct observations of extrasolar Earth-sized planets in the habitable zone could be hampered by a worrisome source of noise, starlight-reflecting exozodiacal dust. Mid-infrared surveys are currently underway to constrain the amount…

太阳与恒星天体物理 · 物理学 2015-06-23 Christopher C. Stark , Marc J. Kuchner , Andrew Lincowski

The light from a source at a distance d will arrive at detectors separated by 100 AU at times that differ by as much as 120 (d/100 Mpc)^{-1} nanoseconds because of the curvature of the wavefront. At gigahertz frequencies, the arrival time…

宇宙学与河外天体物理 · 物理学 2023-05-10 Kyle Boone , Matthew McQuinn

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…

天体物理学 · 物理学 2009-11-13 Harald Krueger , Markus Landgraf , Nicolas Altobelli , Eberhard Gruen

The Parker Solar Probe (PSP) spacecraft has transited the inner-most regions of the zodiacal cloud and detects impacts to the spacecraft body via its electric field instrument. Multiple dust populations have been proposed to explain the PSP…

地球与行星天体物理 · 物理学 2024-12-09 J. R. Szalay , P. Pokorný , D. M. Malaspina

The young star AB Aurigae is surrounded by a complex combination of gas-rich and dust dominated structures. The inner disk which has not been studied previously at sufficient resolution and imaging dynamic range seems to contain very little…

In the interstellar medium, carbon (nano-)grains are a major component of interstellar dust. This solid phase is more vulnerable to processing and destruction than its silicate counterpart. It exhibits a complex, size-dependent evolution…

星系天体物理 · 物理学 2019-03-20 T. Boutéraon , E. Habart , N. Ysard , A. P. Jones , E. Dartois , T. Pino

Wolf-Rayet (WR) 140 is the archetypal periodic dust-forming colliding-wind binary that hosts a carbon-rich WR (WC) star and an O-star companion with an orbital period of 7.93 years and an orbital eccentricity of 0.9. Throughout the past…

A significant fraction of binary neutron star mergers occur in star-forming galaxies where the UV-optical and soft X-ray afterglow emission from the relativistic jet may be absorbed by dust and re-emitted at longer wavelengths. We show…

高能天体物理现象 · 物理学 2021-08-25 Wenbin Lu , Christopher F. McKee , Kunal P. Mooley

The low density interstellar medium (ISM) close to the Sun and inside of the heliosphere provides a unique laboratory for studying interstellar dust grains. Grain characteristics in the nearby ISM are obtained from observations of…

星系天体物理 · 物理学 2015-06-05 Priscilla C. Frisch , Jonathan D. Slavin

We investigate the prospects for detecting dust from two body collisions during the late stages of planet formation at 1-150 AU. We develop an analytic model to describe the formation of a dusty cloud of debris and use numerical coagulation…

天体物理学 · 物理学 2008-11-26 Scott J. Kenyon , Benjamin C. Bromley

The dust detector system onboard Galileo records dust impacts in circumjovian space since the spacecraft has been injected into a bound orbit about Jupiter in December 1995. This is the sixth in a series of papers dedicated to presenting…

The measurements of cosmic interplanetary dust by the instruments on board the Pioneer 10 and 11 spacecraft contain the dynamical signature of dust generated by Edgeworth-Kuiper Belt objects, as well as short period Oort Cloud comets and…

天体物理学 · 物理学 2016-08-16 M. Landgraf , J. -C. Liou , H. A. Zook , E. Grün

The charge released by impact ionization of fast dust grains impinging on spacecraft is at the basis of a well-known technique for dust detection by wave instruments. Since most of the impact charges are recollected by the spacecraft,…

地球与行星天体物理 · 物理学 2014-05-15 N. Meyer-Vernet , M. Moncuquet , K. Issautier , A. Lecacheux

The major satellites of Jupiter and Saturn are believed to have formed in circumplanetary discs, which orbit forming giant protoplanets. Gas and dust in CPDs have different distributions and affect each other by drag, which varies with…

地球与行星天体物理 · 物理学 2023-01-25 Samuel M. Karlin , Olja Panić , Sven van Loo