Results 91 to 100 of about 1,965,723 (227)

Constraining Solar Emission Radius at 42 MHz During the 2024 Total Solar Eclipse Using a Student-commissioned Radio Telescope

The Astrophysical Journal
Low-frequency solar radio emission is sourced in the solar corona, with sub-100 MHz radio emission largely originating from the ∼10 ^5 K plasma around 2 optical radii.
Olivia R. Young, Timothy E. Dolch, Joseph F. Helmboldt, Christopher Mentrek, Louis P. Dartez, Michael T. Lam, Sophia V. Sosa Fiscella, Evan Bretl, Colin Joyce, Johannes Loock, Grace Meyer, Annabel Peltzer, Joseph Petullo, Parker Reed, Emerson Sigtryggsson, Benjamin Bassett, Andrew B. Hawken, Alejandro Z. Heredia, Paige Lettow, Whit Lewis, Mikayla Manna, Nicholas Mirochnikoff, Michael Zemcov   +22 more
doaj   +1 more source

ASTROPHYSICAL STUDIES WITH SMALL LOW-FREQUENCY RADIO TELESCOPES OF NEW GENERATION

Radio Physics and Radio Astronomy, 2016
Purpose: define and theoretically substantiate the range of astrophysical problems that may be efficiently solved using small antenna arrays. Design/methodology/approach: Observation parameters and configurations of a set of small antenna arrays ...
A. A. Konovalenko, S. M. Yerin, I. M. Bubnov, P. L. Tokarsky, V. V. Zakharenko, O. M. Ulyanov, M. A. Sidorchuk, S. V. Stepkin, A. O. Gridin, G. V. Kvasov, V. L. Koliadin, V. M. Melnik, V. V. Dorovskyy, M. M. Kalinichenko, G. V. Litvinenko, P. Zarka, L. Denis, J. Girard, H. O. Rucker, M. Panchenko, A. A. Stanislavsky, O. D. Khristenko, D. V. Mukha, O. M. Reznichenko, V. M. Lisachenko, V. V. Bortsov, A. I. Brazhenko, I. Y. Vasylieva, A. O. Skoryk, A. I. Shevtsova, K. Y. Mylostna   +30 more
doaj   +1 more source

Using Partial Solar Eclipse for the 14-Metre Radio Telescope Calibration

Latvian Journal of Physics and Technical Sciences, 2023
Abstract A partial solar eclipse occurred on 25 October 2022, in the central and northern parts of Europe. The partial solar eclipse was observed at Aalto University Metsähovi Radio Observatory, Finland at the radio wavelength of 8 mm (37 GHz). In Finland, the magnitude of the partial solar eclipse was 62.7 %.
openaire   +3 more sources

PROGRESS IN THE STUDY OF DECAMETER-WAVELENGTH SOLAR RADIO EMISSION WITH UKRAINIAN RADIO TELESCOPES. Part 2

Radio Physics and Radio Astronomy, 2023
Subject and Purpose. This part of the paper continues presentation of results of the solar radio emission studies performed with Ukrainian radio telescopes over the past 20 years. The importance is stressed of developing adequate instruments and methods for identifying the nature of decameter-wavelength radio emissions from the Sun.
A. A. Stanislavsky, A. A. Koval, I. N. Bubnov, A. I. Brazhenko   +3 more
openaire   +1 more source

The effect of solar radiation on radio signal for radio astronomy purposes [Kesan radiasi solar terhadap isyarat radio untuk kajian astronomi radio]

, 2015
Radio astronomy is a subfield of astronomy which is discovers the celestial objects at radio frequencies. Observation in radio astronomy is conducted using single antenna or array of antennas, known as radio telescope.
Atiq Wahidah, Azlan, Roslan, Umar, Nor Hazmin, Sabri   +2 more
core   +1 more source

Performance of radio-based detection for operational monitoring of M5+ class solar flares

Journal of Space Weather and Space Climate
Early detection of major solar flares is critical due to their potential to disturb radar and radio systems. Typically, soft X-ray flux is used to monitor and classify solar flares, but since this flux has to be measured in space, it means that its ...
van Ravenswaaij Julia, Wilms Ines, Ricardo Ivan, Brchnelova Michaela   +3 more
doaj   +1 more source

Numerical Study on Solar Thermal Error and its Compensation of Large Radio Telescope

工程科学与技术
Radio telescope is widely used in the fields of radio astronomy and navigation. The electromagnetic performance of radio telescope is heavily affected by the structural thermal deformation due to solar heating as the working frequency and aperture ...
Zhen LEI, Liang NING, Haoxiang CHEN, Wulin ZHAO, Binbin XIANG, Dongwei LI   +5 more
doaj  

Study on the Temporal Evolution of the Radial Differential Rotation of Solar Corona Using Radio Emissions

The Astrophysical Journal
The daily measurements of the disk-integrated solar radio flux, observed by the Radio Solar Telescope Network, at 245, 410, 610, 1415, 2695, 4995, and 8800 MHz during the time interval of 1989 January 1 to 2019 December 17, are used to investigate the ...
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, Y. J. Wang, X. W. Tan   +5 more
doaj   +1 more source

Observation at radio frequencies of the hydroxyl (OH) absorption line in filaments and prominences above active regions of the Sun

Solar-Terrestrial Physics
When observing the Sun with RATAN-600 radio telescope using a spectropolarimetric complex in the range 1–3 GHz, as well as when observing coronal rain, absorption in the radio emission was discovered in the spectral region 1.5–1.65 GHz in active solar ...
Ovchinnikova N. E., Bogod V. M., Lebedev M. K.   +2 more
doaj   +1 more source

First Robust Detection of Linear Polarization from Metric Solar Emissions: Challenging Established Paradigms

The Astrophysical Journal Letters
Polarimetric radio observations of the Sun can provide rich information about emission mechanisms and the propagation medium. For the past five decades, solar polarimetric studies at low radio frequencies have almost always assumed the absence of linear ...
Soham Dey, Devojyoti Kansabanik, Divya Oberoi, Surajit Mondal   +3 more
doaj   +1 more source