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The quasi-thermal motion of plasma particles produces electrostatic fluctuations, whose voltage power spectrum induced on electric antennas reveals plasma properties. In weakly magnetised plasmas, the main feature of the spectrum is a line…

Plasma Physics · Physics 2023-11-29 N. Meyer-Vernet , A. Lecacheux , M. Moncuquet , K. Issautier , W. S. Kurth

Quasi-periodic pulsations (QPPs), which carry time features and plasma characteristics of flare emissions, are frequently observed in light curves of solar/stellar flares. In this paper, we investigated non-stationary QPPs associated with…

Solar and Stellar Astrophysics · Physics 2022-09-23 Dong Li , Fanpeng Shi , Haisheng Zhao , Shaolin Xiong , Liming Song , Wenxi Peng , Xinqiao Li , Wei Chen , Zongjun Ning

Only indirect evidence of the role of magnetic braking in regulating gravitational collapse and the formation of circumstellar disks was found from observational work, such as compact disk sizes and the launching of high-velocity collimated…

Solar and Stellar Astrophysics · Physics 2024-04-18 N. Añez-Lopez , U. Lebreuilly , A. Maury , P. Hennebelle

We report on mapping of the north polar region of Mars using data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument. We have observed three Mars Years (28-30) of late-winter and spring recessions…

Earth and Planetary Astrophysics · Physics 2014-03-14 Adrian J. Brown , Wendy M. Calvin , Scott L. Murchie

Atomically thin MoS$_{2}$ crystals have been recognized as a quasi-2D semiconductor with remarkable physics properties. This letter reports our Raman scattering measurements on multilayer and monolayer MoS$_{2}$, especially in the…

Mesoscale and Nanoscale Physics · Physics 2015-06-11 Hualing Zeng , Bairen Zhu , Kai Liu , Jiahe Fan , Xiaodong Cui , Q. M. Zhang

We obtained K-band spectro-interferometric observations of the Miras R Cnc, X Hya, W Vel, and RW Vel with a spectral resolution of 1500 using the VLTI/AMBER instrument. We obtained concurrent JHKL photometry using the the Mk II instrument…

Solar and Stellar Astrophysics · Physics 2011-07-22 M. Wittkowski , D. A. Boboltz , M. Ireland , I. Karovicova , K. Ohnaka , M. Scholz , F. van Wyk , P. Whitelock , P. R. Wood , A. A. Zijlstra

A magnetic disc wind is an important mechanism that may be responsible for driving accretion and structure formation in protoplanetary discs. Recent numerical simulations have shown that these winds can take either the traditional…

Earth and Planetary Astrophysics · Physics 2020-08-19 Philip Kwong Ching Leung , Gordon I. Ogilvie

Depression in magnetic field strength with a scale below one proton gyroradius is referred to as kinetic-size magnetic hole (KSMH). KSMHs are frequently observed near terrestrial space environments and are thought to play an important role…

Space Physics · Physics 2021-12-08 S. Y. Huang , R. T. Lin , Z. G. Yuan , K. Jiang , Y. Y. Wei , S. B. Xu , J. Zhang , Z. H. Zhang , Q. Y. Xiong , L. Yu

Context. A large prominence was observed on September 24, 2013, for three hours (12:12 UT -15:12 UT) with the newly launched (June 2013) Interface Region Imaging Spectrograph (IRIS), THEMIS (Tenerife), the Hinode Solar Optical Telescope…

Solar and Stellar Astrophysics · Physics 2014-10-01 Brigitte Schmieder , Hui Tian , Arturo Lopez Ariste , Nicole Mein , Pierre Mein , Kevin Dalmasse , Leon Golub

Context. Understanding the close relationship between the plasma and the magnetic field is important to describe and explain the observed complex dynamics of solar prominences. Aims. We determine if a close relationship between plasma and…

Solar and Stellar Astrophysics · Physics 2017-11-01 P. J. Levens , N. Labrosse , B. Schmieder , A. López Ariste , L. Fletcher

Highly precise pulsar timing is very important for understanding the nature of neutron stars and the implied physics, even being used to detect directly gravitational waves. Unfortunately, the accuracy of the pulsar timing is seriously…

High Energy Astrophysical Phenomena · Physics 2018-11-12 Zhaojun Wang , Guoliang Lü , Chunhua Zhu , Lin Li , Anzhong Wang

We report wind measurements within Martian dust devils observed in plan view from the High Resolution Imaging Science Experiment (HiRISE) orbiting Mars. The central color swath of the HiRISE instrument has three separate charge-coupled…

Earth and Planetary Astrophysics · Physics 2013-01-28 David S. Choi , Colin M. Dundas

Aim. We investigate synthetic observational signatures generated from numerical models of transverse waves propagating in braided magnetic fields. Methods. We examine two simulations with different levels of magnetic field braiding and…

Solar and Stellar Astrophysics · Physics 2020-11-11 Lianne Fyfe , Thomas Howson , Ineke De Moortel

Solar wind turbulence is a dynamical phenomenon that evolves with heliocentric distance. Orbiting Mars since September 2014, Mars Atmosphere and Volatile EvolutioN (MAVEN) offers a unique opportunity to explore some of its main properties…

Solar and Stellar Astrophysics · Physics 2024-06-27 Norberto Romanelli , Nahuel Andres , Gina DiBraccio , Jaye Verniero , Jacob Gruesbeck , Adam Szabo , Jared Espley , Jasper Halekas

For finite systems boundaries can introduce remarkable novel features. A well known example is the Casimir effect [1, 2] that is observed in quantum electrodynamic systems. In classical systems too novel effects associated with finite…

The position of a Martian lander is affected by different aspects of Mars' rotational motions: the nutations, the precession, the length-of-day variations and the polar motion. These various motions have a different signature in a Doppler…

Earth and Planetary Astrophysics · Physics 2017-05-19 Marie Yseboodt , Veronique Dehant , Marie-Julie Peters

We report the first observation of protons in the near (100--200 km from surface) and deeper (near anti-subsolar point) lunar plasma wake when the interplanetary magnetic field (IMF) and solar wind velocity ($v_{sw}$) are parallel (aligned…

We analyse the observational signatures of galactic magnetic fields that are self-consistently generated in magnetohydrodynamic simulations of the interstellar medium through turbulence driven by supernova (SN) explosions and differential…

Astrophysics of Galaxies · Physics 2022-12-06 Yann Carteret , Abhijit B. Bendre , Jennifer Schober

Computing the tidal deformations of Mars, we explored various Mars internal structures by examining profiles that include or exclude a basal molten layer within the mantle and a solid inner core. By assessing their compatibility with a…

Earth and Planetary Astrophysics · Physics 2024-03-12 Alex Guinard , Agnes Fienga , Anthony Memin , Clement Ganino

Temperature profiles retrieved using the first set of data of the Emirates Mars InfraRed Spectrometer (EMIRS) obtained during the science phase of the Emirates Mars Mission (EMM) are used for the analysis of migrating thermal tides in the…