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In this fourth paper in a series, we present a model of the remarkable temporal and azimuthal variability of the Io plasma torus observed during the Cassini encounter with Jupiter. Over a period of three months, the Cassini Ultraviolet…

Astrophysics · Physics 2009-10-16 A. J. Steffl , P. A. Delamere , F. Bagenal

This paper proposes a new method for estimating the contribution from different ionospheric regions to the response of total electron content variations to the solar flare which uses the effect of partial shadowing of the atmosphere by the…

Geophysics · Physics 2015-06-26 L. A. Leonovich , E. L. Afraimovich , E. B. Romanova , A. V. Taschilin

Equatorial ionospheric irregularities have been studied in the past and have produced interesting insights into ionospheric physics and processes. Here, we present the initial results of a long-term study of the ionosphere near the…

Space Physics · Physics 2023-02-14 Sumanjit Chakraborty , Abhirup Datta

In general, small bodies of the solar system, e.g., asteroids and comets, have a very irregular shape. This feature affects significantly the gravitational potential around these irregular bodies, which hinders dynamical studies. The…

Earth and Planetary Astrophysics · Physics 2017-12-19 Gabriel Borderes Motta , Othon Cabo Winter

The ``P32'' Astronomical Observation Template (AOT) provided a means to map large areas of sky (up to 45x45 arcmin) in the FIR at high redundancy and with sampling close to the Nyquist limit using the ISOPHOT C100 (3x3) and C200 (2x2)…

Astrophysics · Physics 2007-05-23 R. J. Tuffs , C. Gabriel

An algorithm for representing irregular satellite data obtained from advanced synthetic aperture radar (ASAR) uniformly in space and time is introduced and comparison with WAVEWATCH III model (WW3) data is carried out. Swell global data for…

Atmospheric and Oceanic Physics · Physics 2021-01-01 Heitor Perotto , Leandro Farina , Nelson Violante-Carvalho

The low-latitude ionosphere is a dynamic region with a wide range of disturbances in temporal and spatial scales. The Giant Metrewave Radio Telescope (GMRT) situated in the low-latitude region has demonstrated its ability to detect various…

Space Physics · Physics 2023-07-13 Sarvesh Mangla , Abhirup Datta

A combined radar remote sensing and in situ data set is used to track packets of nonlinear internal waves as they propagate and shoal across the inner shelf (40m - 9m). The dataset consists of high space-time resolution (5m, 2min) radar…

Atmospheric and Oceanic Physics · Physics 2024-04-30 Alexandra J. Simpson , Jacqueline M. McSweeney , James A. Lerczak , Merrick C. Haller

Observing and studying the evolution of rare non-repetitive natural phenomena such as optical rogue waves or dynamic chemical processes in living cells is a crucial necessity for developing science and technologies relating to them. One…

Optics · Physics 2020-04-22 Farshid Shateri , Shiva Behzadfar , Zahra Kavehvash

In the last decade, a number of experiments dealt with the problem of measuring the arrival direction distribution of cosmic rays, looking for information on the propagation mechanisms and the identification of their sources. Any deviation…

Instrumentation and Methods for Astrophysics · Physics 2015-06-12 Roberto Iuppa , Giuseppe Di Sciascio

Attosecond transient-absorption spectroscopy (ATAS) is an established method for exploring electron dynamics on the subfemtosecond time-scale. ATAS spectra contain certain ubiquitous features, such as oscillating fringes, light-induced…

Atomic Physics · Physics 2017-08-02 Jørgen Johansen Rørstad , Jens E. Bækhøj , Lars Bojer Madsen

As its periastron passage occurred during the third quarter of 2020, system 24 Aqr is of particular significance. New visual solutions for the latest speckle interferometry observations collected by the Lowell Discovery Telescope (LTD) with…

We present the first detection of the l-C3H+ hydrocarbon in the interstellar medium. The Horsehead WHISPER project, a millimeter unbiased line survey at two positions, namely the photo-dissociation region (PDR) and the nearby shielded core,…

Interferometric scattering (iSCAT) microscopy is currently among the most powerful techniques available for achieving high-sensitivity single-particle localization. This capability is realized through homodyne detection, where interference…

Optics · Physics 2024-10-08 Nathan J. Brooks , Chih-Chen Liu , Chia-Lung Hsieh

This paper presents InsSo3D, an accurate and efficient method for large-scale 3D Simultaneous Localisation and Mapping (SLAM) using a 3D Sonar and an Inertial Navigation System (INS). Unlike traditional sonar, which produces 2D images…

We use radiative transfer to study the growth of ionized regions around the brightest, z=8 quasars in a large cosmological hydrodynamic simulation that includes black hole growth and feedback (the MassiveBlack simulation). We find that in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Yu Feng , Rupert A. C. Croft , Tiziana Di Matteo , Nishikanta Khandai

We present a numerical algorithm aimed at identifying ion diffusion regions (IDRs) in the geomagnetic tail, and test its applicability. We use 5 criteria applied in three stages. (i) Correlated reversals (within 90 s) of Vx and Bz (at least…

Space Physics · Physics 2019-10-09 A. J. Rogers , C. J. Farrugia , R. B. Torbert

In the interstellar medium, the cosmic elemental carbon abundance includes the total carbon in both gas and solid phases. The aim of the study was to trial a new method for measuring the amount and distribution of aliphatic carbon within…

Astrophysics of Galaxies · Physics 2020-02-13 B. Günay , M. G. Burton , M. Afşar , T. W. Schmidt

A particle tracking velocimetry apparatus is presented that is capable of measuring three-dimensional particle trajectories across large volumes, of the order of several meters, during natural snowfall events. Field experiments, aimed at…

Fluid Dynamics · Physics 2023-04-12 Nathaniel Bristow , Jiaqi Li , Peter Hartford , Michele Guala , Jiarong Hong

The state of the atmosphere is governed by the classical laws of fluid motion and exhibits correlations in various spatial and temporal scales. These correlations are crucial to understand the short and long term trends in climate. Cirrus…

Statistical Mechanics · Physics 2015-06-24 K. Ivanova , T. P. Ackerman , E. E. Clothiaux , P. Ch. Ivanov , H. E. Stanley , M. Ausloos