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With numerical experiments we explore the feasibility of using high frequency waves for probing the magnetic fields in the photosphere and the chromosphere of the Sun. We track a plane-parallel, monochromatic wave that propagates through a…

天体物理学 · 物理学 2009-11-13 O. Steiner , G. Vigeesh , L. Krieger , S. Wedemeyer-Böhm , W. Schaffenberger , B. Freytag

Cosmic Microwave Background (CMB) full-sky temperature data show a hemispherical asymmetry in power nearly aligned with the Ecliptic. In real space, this anomaly can be quantified by the temperature variance in the northern and southern…

宇宙学与河外天体物理 · 物理学 2017-06-28 Marcio O'Dwyer , Craig J. Copi , Lloyd Knox , Glenn D. Starkman

We study Doppler velocity measurements at multiple heights in the solar atmosphere using a set of six filtergrams obtained by the Helioseismic magnetic Imager on board the Solar Dynamics Observatory. There are clear and significant phase…

太阳与恒星天体物理 · 物理学 2014-01-15 Kaori Nagashima , Laurent Gizon , Aaron Birch , Björn Löptien , Sebastien Couvidat , Bernhard Fleck

In this paper, we explore the power of the cosmic microwave background (CMB) polarization (E-mode) data to corroborate four potential anomalies in CMB temperature data: the lack of large angular-scale correlations, the alignment of the…

We investigate the performance of the MAGIC telescopes under three simulated atmospheric conditions: an increased aerosol content in the lower part of the troposphere, the presence of thin aerosol over-densities at different heights, and an…

天体物理仪器与方法 · 物理学 2019-08-13 Daniel Garrido , Markus Gaug , Michele Doro , Lluís Font , Alicia López-Oramas , Abelardo Moralejo

The Planck collaboration has measured the temperature and polarization of the cosmic microwave background well enough to determine the locations of eight peaks in the temperature (TT) power spectrum, five peaks in the polarization (EE)…

宇宙学与河外天体物理 · 物理学 2016-04-27 Zhen Pan , Lloyd Knox , Brigid Mulroe , Ali Narimani

We forecast constraints on cosmological parameters enabled by three surveys conducted with SPT-3G, the third-generation camera on the South Pole Telescope. The surveys cover separate regions of 1500, 2650, and 6000 ${\rm deg}^{2}$ to…

Earth's energy imbalance at the top of the atmosphere is a key climate system metric, but its natural variability is poorly constrained by the short observational record and large uncertainty in coupled climate models. While existing ocean…

大气与海洋物理 · 物理学 2026-03-24 Dominik Stiller , Gregory J. Hakim

The geographic South Pole provides unique opportunities to study cosmic particles in the Southern Hemisphere. It represents an optimal location to deploy large-scale neutrino telescopes in the deep Antarctic ice, such as AMANDA or IceCube.…

高能天体物理现象 · 物理学 2024-05-21 D. Soldin , P. A. Evenson , H. Kolanoski , A. A. Watson

The understanding of the fundamental properties of the climate system has long benefitted from the use of simple numerical models able to parsimoniously represent the essential ingredients of its processes. Here we introduce a new model for…

混沌动力学 · 物理学 2020-11-16 Gabriele Vissio , Valerio Lucarini

Atmospheric transmission from Dome A, Antarctica, presents new possibilities in the field of terahertz astronomy, where space telescopes have been the only observational tools until now. Using atmospheric transmission measurements from Dome…

天体物理仪器与方法 · 物理学 2019-02-19 Hiroshi Matsuo , Sheng-Cai Shi , Scott Paine , Qi-Jun Yao , Zhen-Hui Lin

We study acoustic-gravity waves in a quasi-isothermal atmosphere in the presence of a weak random addition to the vertical temperature profile, which simulates the real atmosphere of the Earth at altitudes greater than $\sim 200$ km. The…

斑图形成与孤子 · 物理学 2022-12-23 V. M. Lashkin , O. K. Cheremnykh

This paper investigates the initial boundary value problem for a non-stationary one-dimensional heat equation that simulates the temperature distribution in freshwater ice near the Earth's poles. The mathematical model has been constructed…

地球物理 · 物理学 2021-10-11 A. A. Fedotov , V. V. Kaniber , P. V. Khrapov

An iterative method is presented for reconstructing the height-temperature profile of the solar atmosphere above a sunspot using multi-frequency spectro-polarimetric microwave observations. It is assumed that the emission is formed…

太阳与恒星天体物理 · 物理学 2026-03-09 T. I. Kaltman , A. G. Stupishin , G. A. Makoev

The regimes of possible global atmospheric circulation patterns in an Earth-like atmosphere are explored using a simplified GCM based on the University of Hamburg's Portable University Model for the Atmosphere with simplified (linear)…

地球与行星天体物理 · 物理学 2019-06-19 Yixiong Wang , Peter Read , Fachreddin Tabataba-Vakili , Roland Young

In this paper we quantify the performances of an automated weather forecast system implemented on the Large Binocular Telescope (LBT) site at Mt. Graham (Arizona) in forecasting the main atmospheric parameters close to the ground. The…

天体物理仪器与方法 · 物理学 2017-01-26 Alessio Turchi , Elena Masciadri , Luca Fini

In the present work, we study the largest structures of the CMB temperature measured by Planck in terms of the most prominent peaks on the sky, which, in particular, are located in the southern galactic hemisphere. Besides these large-scale…

宇宙学与河外天体物理 · 物理学 2017-05-17 A. Marcos-Caballero , E. Martínez-González , P. Vielva

Radio occultations are commonly used to assess remotely the thermodynamic properties of planets or satellites' atmospheres within the solar system. The data processing usually involves the so-called Abel inversion method or the numerical…

地球与行星天体物理 · 物理学 2022-08-22 Adrien Bourgoin , Edoardo Gramigna , Marco Zannoni , Luis Gomez Casajus , Paolo Tortora

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…

宇宙学与河外天体物理 · 物理学 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

We have measured the correlation of rates in IceCube with long and short term variations in the South Pole atmosphere. The yearly temperature variation in the middle stratosphere (30-60 hPa) is highly correlated with the high energy muon…

高能天体物理现象 · 物理学 2019-08-13 Serap Tilav , Paolo Desiati , Takao Kuwabara , Dominick Rocco , Florian Rothmaier , Matt Simmons , Henrike Wissing