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The orbital distributions of dust particles in interplanetary space are inferred from several meteoroid data sets under the constraints imposed by the orbital evolution of the particles due to the planetary gravity and Poynting-Robertson…

地球与行星天体物理 · 物理学 2019-02-11 Valeri V. Dikarev , Eberhard Grün , William J. Baggaley , David P. Galligan , Markus Landgraf , Rüdiger Jehn

Magnetosphere at ion kinetic scales, or mini-magnetosphere, possesses unusual features as predicted by numerical simulations. However, there are practically no data on the subject from space observations and the data which are available are…

等离子体物理 · 物理学 2017-11-17 Shaikhislamov I F , Yu P Zakharov , V G Posukh , A V Melekhov , V M Antonov , E L Boyarintsev , A G Ponomarenko

The possibility of measuring the post-Newtonian gravitoelectric correction to the orbital period of a test particle freely orbiting a spherically symmetric mass in the Solar System is analyzed. It should be possible, in principle, to detect…

广义相对论与量子宇宙学 · 物理学 2012-07-31 Lorenzo Iorio

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…

天体物理学 · 物理学 2007-05-23 M. Landgraf

We use the plasma density based on measurements of the probe-to-spacecraft potential in combination with magnetic field measurements by MAG to study fields and density fluctuations in the solar wind observed by Solar Orbiter during the…

The aim of this paper is to study the plasma flows on the Mercury surface for different interplanetary magnetic field orientations on the day side of the planet. We use a single fluid MHD model in spherical coordinates to simulate the…

地球与行星天体物理 · 物理学 2016-08-15 J. Varela , F. Pantellini , M. Moncuquet

Each of the two STEREO spacecraft carries a SEPT Instrument which measures electrons and protons. Anisotropy observations are provided in four viewing directions. The SEP event on 7 Nov 2013 was observed by both STEREO spacecraft, which…

An overview is given of the methods and preliminary results from dedicated beam studies on three topics conducted over five days in July 2023. In the first study, the Fermilab Booster magnets were held constant at magnetic fields…

加速器物理 · 物理学 2024-08-20 Jeffrey Eldred , Michael Balcewicz , Frank Schmidt , Benjamin Simons

Recently, an Atacama Large Millimeter/submillimeter Array (ALMA) observation of the water snow line in the protoplanetary disk around the FU Orionis star V883 Ori was reported. The radial variation of the spectral index at mm-wavelengths…

地球与行星天体物理 · 物理学 2017-09-06 Djoeke Schoonenberg , Satoshi Okuzumi , Chris W. Ormel

We analytically calculate the time series for the perturbations $\Delta\rho(t),~\Delta\dot\rho(t)$ induced by a general disturbing acceleration $\boldsymbol{A}$ on the mutual range $\rho$ and range-rate $\dot\rho$ of two test particles…

广义相对论与量子宇宙学 · 物理学 2018-03-19 Lorenzo Iorio

Dayside magnetosphere of Mars is a thin layer with usually increased magnetic field and heated planetary ions between the magnetosheath and the ionosphere. The Mars Atmosphere and Volatile Evolution Mission (MAVEN) spacecraft provided, for…

空间物理 · 物理学 2019-09-17 Oleg Vaisberg , Sergey Shuvalov , Aibar Ramazan , Vladimir Ermakov , Ivan Leonov

The aim of this research is to simulate the interaction of the solar wind with the magnetic field of Mercury and to study the particle fluxes between the magnetosheath and the planet surface. We simulate the magnetosphere structure using…

地球与行星天体物理 · 物理学 2016-08-17 J. Varela , F. Pantellini , M. Moncuquet

The planet Mercury is locked in a spin-orbit resonance where it rotates three times about its spin axis for every two orbits about the Sun. The current explanation for this unique state assumes that the initial rotation of this planet was…

地球与行星天体物理 · 物理学 2011-12-13 Mark A. Wieczorek , Alexandre C. M. Correia , Mathieu Le Feuvre , Jacques Laskar , Nicolas Rambaux

The BIMA Survey of Nearby Galaxies is a systematic imaging study of the 3 mm CO J = 1--0 molecular emission within the centers and disks of 44 nearby spiral galaxies. The typical spatial resolution of the survey is 6", or 360 pc at the…

As part of the ALMA Large Program "Early Planet Formation in Embedded Disks" (eDisk), 12CO (2 - 1) was observed towards 19 nearby low-mass protostars. Of these objects, 15 sources are found to show molecular outflow emission. Based on their…

Early-type stars have convective cores due to a steep temperature gradient produced by the CNO cycle. These cores can host dynamos, and the generated magnetic fields can be relevant to explain the magnetism observed in Ap/Bp stars. Our main…

太阳与恒星天体物理 · 物理学 2024-11-27 J. P. Hidalgo , P. J. Käpylä , D. R. G Schleicher , C. A. Ortiz-Rodríguez , F. H. Navarrete

Spacecraft measurements of Mercury indicate it has a core dynamo with a surface field of 200-800 nT. These data also indicate that the crust contains remanent magnetization likely produced by an ancient magnetic field. The inferred…

地球与行星天体物理 · 物理学 2026-05-07 Isaac S. Narrett , Rona Oran , Yuxi Chen , Katarina Miljković , Gábor Tóth , Catherine L. Johnson , Benjamin P. Weiss

In a study to provide ground truth data for mid infrared observations of the surface of Mercury with the MERTIS (Mercury Radiometer and Thermal Infrared Spectrometer) instrument onboard the ESA/JAXA BepiColombo mission, we have studied 17…

地球与行星天体物理 · 物理学 2023-02-01 Andreas Morlok , Stephan Klemme , Iris Weber , Aleksandra N. Stojic , Martin Sohn , Harald Hiesinger

Mars, lacking an intrinsic dynamo, is an ideal laboratory to comparatively study induced magnetospheres, which can be found in other terrestrial bodies as well as comets. Additionally, Mars is of particular interest to further exploration…