Results 171 to 180 of about 441,564 (317)

The Simons Observatory: Design, Integration, and Testing of the Small Aperture Telescopes

open access: yesThe Astrophysical Journal Supplement Series
The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert in Chile.
Nicholas Galitzki   +81 more
doaj   +1 more source

An Upward Multi‐Pulse TGF Involved With Two Thunderstorm Cells

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.
Abstract Gamma rays associated with lightning discharges are evidence of ∼30 ${\sim} 30$ MeV electrons acceleration by electric field in the atmosphere. However, the acceleration site and actual condition of it are not yet identified. On 30 December 2021, a terrestrial gamma ray flash (TGF) with five (or six) consecutive pulses were detected by our ...
K. Nakazawa   +17 more
wiley   +1 more source

Measurement and Modeling of Polarized Atmosphere at the South Pole with SPT-3G

open access: yesThe Astrophysical Journal
We present the detection and characterization of fluctuations in linearly polarized emission from the atmosphere above the South Pole. These measurements make use of data from the SPT-3G receiver on the South Pole Telescope in three frequency bands ...
A. Coerver   +104 more
doaj   +1 more source

Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments

open access: yesThe Astrophysical Journal Supplement Series
It is well known that multiple Galactic thermal dust emission components may exist along the line of sight, but a single-component approximation is still widely used, since a full multicomponent estimation requires a large number of frequency bands that ...
Hao Liu, Jia-Rui Li, Yi-Fu Cai
doaj   +1 more source

An Upper Limit to Arcminute‐Scale Anisotropy in the Cosmic Microwave Background Radiation at 142 GHz [PDF]

open access: bronze, 1997
Sarah E. Church   +6 more
openalex   +1 more source

ABSTRACTS

open access: yes
Precision Radiation Oncology, EarlyView.
wiley   +1 more source

Can Chameleon Fields Be the Source of the Dark Energy Dipole and the Cosmic Microwave Background Dipole?

open access: yesThe Astrophysical Journal
Recent research reveals that the Local Group is in motion toward ( l , b ) = (276, 30) relative to the cosmic background radiation, manifesting a velocity of 600 km s ^−1 , a phenomenon recognized as the cosmic background radiation dipole or cosmic ...
Muhammad Yarahmadi, Amin Salehi
doaj   +1 more source

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