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The redshift dependence of the cosmic microwave background temperature is one of the key cosmological observables. In the standard cosmological model one has $T(z)=T_0(1+z)$, where $T_0$ is the present-day temperature. Deviations from this…

Cosmology and Nongalactic Astrophysics · Physics 2016-03-02 A. Avgoustidis , R. T. Génova-Santos , G. Luzzi , C. J. A. P. Martins

The standard model of cosmic ray propagation has been very successful in explaining all kinds of the Galactic cosmic ray spectra. However, high precision measurement recently revealed the appreciable discrepancy between data and model…

High Energy Astrophysical Phenomena · Physics 2017-02-22 Y. Q. Guo , H. B. Hu , Z. Tian

We study the statistical properties of spherical harmonic modes of temperature maps of the cosmic microwave background. Unlike other studies, which focus mainly on properties of the amplitudes of these modes, we look instead at their…

Astrophysics · Physics 2009-11-10 Peter Coles , Patrick Dineen , John Earl , Dean Wright

For the sake of complete theoretical research of atmospheric refraction, the atmospheric refraction under the condition of lower angles of elevation is still worthy to be analyzed and explored. In some engineering applications, the objects…

Instrumentation and Methods for Astrophysics · Physics 2015-10-14 Yong Yu , Jian-Jun Cao , Zheng-Hong Tang , Hao Luo , Ming Zhao

Ground-based large-aperture telescopes, interferometers, and future Extremely Large Telescopes equipped with adaptive-optics systems provide angular resolution and high-contrast performance that are superior to space-based telescopes at…

Instrumentation and Methods for Astrophysics · Physics 2024-05-29 Hélène Rousseau , Steve Ertel , Denis Defrère , Virginie Faramaz , Kevin Wagner

Most cosmic ray antiprotons observed near the Earth are secondaries produced in collisions of energetic cosmic ray (CR) particles with interstellar gas. The spectrum of secondary antiprotons is expected to peak at ~2 GeV and decrease…

Astrophysics · Physics 2007-05-23 I. V. Moskalenko , E. R. Christian , A. A. Moiseev , J. F. Ormes , A. W. Strong

The ARCADE 2 instrument has measured the absolute temperature of the sky at frequencies 3, 8, 10, 30, and 90 GHz, using an open-aperture cryogenic instrument observing at balloon altitudes with no emissive windows between the beam-forming…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-05 D. J. Fixsen , A. Kogut , S. Levin , M. Limon , P. Lubin , P. Mirel , M. Seiffert , J. Singal , E. Wollack , T. Villela , C. A. Wuensche

A new analysis is presented of the angular correlation function $C(\Theta)$ of cosmic microwave background (CMB) temperature at large angular separation, based on published maps derived from {\sl WMAP} and {\sl Planck} satellite data, using…

Cosmology and Nongalactic Astrophysics · Physics 2020-01-29 Ray Hagimoto , Craig Hogan , Collin Lewin , Stephan S. Meyer

We derived the coronal magnetic field, plasma density, and temperature from the observation of polarization and intensity of radio thermal free-free emission using the Nobeyama Radioheliograph (NoRH) and extreme ultraviolet (EUV)…

Scatterings whose cross sections increase as the cosmic temperature decreases, known as temperature - enhanced scatterings, can have a significant impact on the thermal effective potential of scalar fields responsible for driving…

Cosmology and Nongalactic Astrophysics · Physics 2026-02-16 Arnab Chaudhuri

Thermography allows for the remote measurement of surface temperatures and is widely used for the identification of energy losses, damage detection or quality control. However, thermal imaging is strongly material dependent and therefore…

Instrumentation and Detectors · Physics 2020-12-22 Sebastian Fiedler , Roland Clauß , Hartmut Clauß , Stefan Knoblach

We establish a connection between the trace anomaly and a thermal radiation in the context of the standard cosmology. This is done by solving the covariant conservation equation of the stress tensor associated with a conformally invariant…

High Energy Physics - Theory · Physics 2009-11-10 Yousef Bisabr

This work presents a novel cosmic-ray scattering experiment employing a Resistive Plate Chambers (RPC) muon tomography system. By introducing the scattering angle between incident and outgoing cosmic-ray tracks as a key observable, this…

A two-dimensional, time-dependent numerical model is used to calculate the modulation of cosmic rays in the heliosphere. Computations are compared to spacecraft observations in the inner and outer heliosphere. It is shown that the model…

High Energy Astrophysical Phenomena · Physics 2013-10-22 Rex Manuel , Stefan Ferreira , Marius Potgieter

The atomic variations of electronic wavefunctions at the surface and electron scattering near a defect have been detected unprecedentedly by tracing thermoelectric voltages given a temperature bias [Cho et al., Nature Mater. 12, 913…

Mesoscale and Nanoscale Physics · Physics 2014-04-02 Eui-Sup Lee , Sanghee Cho , Ho-Ki Lyeo , Yong-Hyun Kim

The day-night variation of cosmic rays intensity at sea level has been observed by a simple G-M counter telescope. We preform two 5 hours counting during the day and night and find that the pattern of variation is closely related to the…

Atmospheric and Oceanic Physics · Physics 2007-05-23 H. M. Mok , K. M. Cheng

The distribution of temperature and emission measure in the stationary heated solar atmosphere was obtained for the limiting cases of slow and fast heating, when either the gas pressure or the concentration are constant throughout the layer…

Solar and Stellar Astrophysics · Physics 2010-04-16 O. Ptitsyna , B. Somov

Radiative cooling is an important ingredient in hydrodynamical models involving evolution of high temperature plasmas. Unfortunately, calculating an accurate cooling coefficient generally requires the solution of over a hundred differential…

Astrophysics · Physics 2009-11-06 Robert A. Benjamin , Bradford A. Benson , Donald P. Cox

The microphysical, kinetic properties of astrophysical plasmas near accreting compact objects are still poorly understood. For instance, in modern general-relativistic magnetohydrodynamic simulations, the relation between the temperature of…

High Energy Astrophysical Phenomena · Physics 2023-03-08 Claudio Meringolo , Alejandro Cruz-Osorio , Luciano Rezzolla , Sergio Servidio