Results 1 to 10 of about 601 (95)
INTERSTELLAR MEDIUM AND DECAMETER RADIO SPECTROSCOPY [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: The analytical review of the main results of research in the new direction of the low-frequency radio astronomy, the interstellar medium radio spectroscopy at decameter waves, which had led to astrophysical discovery, recording of the radio ...
S. V. Stepkin +3 more
doaj +3 more sources
Imaging spectroscopy of solar radio burst fine structures [PDF]
Nature Communications, 2017 Radio observations of the solar atmosphere provide a unique view on the non-thermal processes in the outer atmosphere. Here the authors use LOFAR observations to demonstrate that the observed radio burst characteristics are dominated by propagation ...
E. P. Kontar +8 more
doaj +7 more sources
Radio-Frequency Spectroscopy of Ultracold Fermions [PDF]
Science, 2003 Radio-frequency techniques were used to study ultracold fermions. We observed the absence of mean-field “clock” shifts, the dominant source of systematic error in current atomic clocks based on bosonic atoms. This absence is a direct consequence of fermionic antisymmetry.
Gupta, S +8 more
openaire +5 more sources
Discovery of Hydrogen Radio Recombination Lines at z = 0.89 toward PKS 1830-211
The Astrophysical Journal, 2023 We report the detection of stimulated hydrogen radio recombination line (RRL) emission from ionized gas in a z = 0.89 galaxy using 580–1670 MHz observations from the MeerKAT Absorption Line Survey.
Kimberly L. Emig +16 more
doaj +1 more source
Optical spectroscopy of southern radio galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 We present optical spectroscopy of 11 radio galaxies, using the Anglo-Australian Telescope. Redshifts are measured for the seven radio galaxies with no previously published values, and for the other four which have uncertain ...
Simpson, C +3 more
openaire +2 more sources
The Gas Accretion Rate of Star-forming Galaxies over the Last 4 Gyr
The Astrophysical Journal Letters, 2023 Star-forming galaxies are believed to replenish their atomic gas reservoir, which is consumed in star formation, through accretion of gas from their circumgalactic mediums (CGMs).
Apurba Bera +3 more
doaj +1 more source
Two Types of Localized States in a Photonic Crystal Bounded by an Epsilon near Zero Nanocomposite
Photonics, 2018 The spectral properties of a one-dimensional photonic crystal bounded by a resonant absorbing nanocomposite layer with the near-zero permittivity have been studied.
Rashid G. Bikbaev +2 more
doaj +1 more source
Application of wireless monitoring and communication systems in the power engineering [PDF]
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2012 The article describes some achievements of modern radio electronics, which prove a huge potential of modern wireless engineering for using in the fuel-energy complex.
Grechikhin V. A. +2 more
doaj +2 more sources
Optical spectroscopy of four young radio sources [PDF]
New Astronomy, 2017 11 pages, 5 Figures, 2 Tables, accepted by New ...
Xu-Liang Fan +3 more
openaire +2 more sources
Spectroscopy of Ultra–steep-Spectrum Radio Sources [PDF]
The Astronomical Journal, 2001 59 Pages, including 59 PostScript figures. Accepted for publication in the Astronomical Journal (March 2001 issue).
de Breuck, Carlos +8 more
openaire +3 more sources