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We present mid-infrared SOFIA/EXES spectroscopy of Europa, seeking direct evidence of the presence of water vapor arising from plumes venting from the surface of Europa. We place quantitatively useful upper limits on the strength of water…

Earth and Planetary Astrophysics · Physics 2019-01-30 William Sparks , M. Richter , C. deWitt , E. Montiel , N. Dello Russo , J. Grunsfeld , M. A. McGrath , H. Weaver , K. P. Hand , E. Bergeron , W. Reach

The AMADEUS system is integrated in the ANTARES neutrino telescope in the Mediterranean Sea and aims for the investigation of acoustic particle detection techniques in the deep sea. Installed at a depth of more than 2000m, the acoustic…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 Robert Lahmann

Dust acoustic waves in the bulk of a dust cloud in complex plasma of low-pressure gas discharge under microgravity conditions are considered. The complex plasma is assumed to conform to the ionization equation of state (IEOS) developed in…

Plasma Physics · Physics 2015-11-24 D. I. Zhukhovitskii

Europa's subsurface ocean is a potential candidate for life in the outer solar system. It is thought that plumes may exist which eject ocean material out into space, which may be detected by a spacecraft flyby. Previous work on the…

Earth and Planetary Astrophysics · Physics 2023-03-15 Rowan Dayton-Oxland , Hans L. F. Huybrighs , Thomas O. Winterhalder , Arnaud Maheiux , David Goldstein

A new multispectral Geostationary Operational Environmental Satellite (GOES) imager product has been developed to assess downburst potential over the western United States employing brightness temperature differences (BTD) between band 3…

Atmospheric and Oceanic Physics · Physics 2008-05-01 Kenneth L. Pryor

In this technical report, the systems we submitted for subtask 4 of the DCASE 2021 challenge, regarding sound event detection, are described in detail. These models are closely related to the baseline provided for this problem, as they are…

Audio and Speech Processing · Electrical Eng. & Systems 2022-10-20 Wim Boes , Hugo Van hamme

Extensive aircraft cloud physical observations made in more than 2000 tropical cumulus clouds indicated new observational evidence viz., (1) horizontal structure of the air flow inside the cloud has consistent variations with successive…

General Physics · Physics 2007-05-23 A. Mary Selvam , A. S. Ramachandra Murty

Recent measurements suggest free electrons created in ultra-high energy cosmic ray extensive air showers (EAS) can interact with neutral air molecules producing Bremsstrahlung radiation in the microwave regime. The microwave radiation…

The Cherenkov radio pulse emitted by hadronic showers in ice is calculated for showers of energies in the EeV range. This is obtained with three dimensional simulations of both shower development and the coherent radio pulse emitted as the…

High Energy Astrophysical Phenomena · Physics 2012-04-17 Jaime Alvarez-Muniz , Washington R. Carvalho , Matias Tueros , Enrique Zas

High resolution information on climatic conditions is essential to many applications in environmental and ecological sciences. Here we present the CHELSA Climatologies at high resolution for the earths land surface areas data of downscaled…

We have developed a code that semi-analytically calculates the radio footprint (intensity and polarization) of an extensive air shower subject to atmospheric electric fields. This can be used to reconstruct the height dependence of…

High Energy Astrophysical Phenomena · Physics 2017-04-05 Olaf Scholten , Gia Trinh , Krijn D. de Vries , Lucas van Sloten

The solar acoustic oscillations are likely stochastically excited by convective dynamics in the solar photosphere, though few direct observations of individual source events have been made and their detailed characteristics are still…

Solar and Stellar Astrophysics · Physics 2021-07-07 Shah Mohammad Bahauddin , Mark Peter Rast

Rapidly decaying slow magnetoacoustic waves are regularly observed in the solar coronal structures, offering a promising tool for a seismological diagnostics of the coronal plasma, including its thermodynamical properties. The effect of…

Solar and Stellar Astrophysics · Physics 2019-08-21 D. Y. Kolotkov , V. M. Nakariakov , D. I. Zavershinskii

Using the South Pole Acoustic Test Setup (SPATS) and a retrievable transmitter deployed in holes drilled for the IceCube experiment, we have measured the attenuation of acoustic signals by South Pole ice at depths between 190 m and 500 m.…

Instrumentation and Methods for Astrophysics · Physics 2012-08-27 the IceCube Collaboration

The feasibility and design of an acoustic neutrino detection array in the South Pole ice depend on the acoustic properties of the ice. The South Pole Acoustic Test Setup (SPATS) was built to evaluate the acoustic characteristics of the ice…

Astrophysics · Physics 2019-08-13 Freija Descamps

This paper reviews our growing understanding of the physics behind coronal heating (in open-field regions) and the acceleration of the solar wind. Many new insights have come from the last solar cycle's worth of observations and theoretical…

Solar and Stellar Astrophysics · Physics 2010-02-02 Steven R. Cranmer , John L. Kohl , Mari Paz Miralles , Adriaan A. van Ballegooijen

The paper presents a description of the sound wave absorption in glasses, from the lowest temperatures up to the glass transition, in terms of three compatible phenomenological models. Resonant tunneling, the rise of the relaxational…

Soft Condensed Matter · Physics 2022-08-29 U. Buchenau , G. D'Angelo , G. Carini , X. Liu , M. A. Ramos

Signals emitted by LiDAR sensors would often be negatively influenced during transmission by rain, fog, dust, atmospheric particles, scattering of light and other influencing factors, causing noises in point cloud images. To address this…

Image and Video Processing · Electrical Eng. & Systems 2020-07-29 Yao Duan , Chuanchuan Yang , Hao Chen , Weizhen Yan , Hongbin Li

A new promising development in astroparticle physics is to measure the radio emission from extensive air showers. The particles in the cascade emit synchrotron radiation (30 - 90 MHz) which is detected with arrays of dipole antennas. Recent…

High Energy Astrophysical Phenomena · Physics 2015-05-14 Joerg R. Hoerandel