Results 61 to 70 of about 6,025 (156)

Reconstruction of Helio-latitudinal Structure of the Solar Wind Proton Speed and Density [PDF]

, 2015
The modeling of the heliosphere requires continuous three-dimensional solar wind data. The in-situ out-of-ecliptic measurements are very rare, so that other methods of solar wind detection are needed.
Bzowski, Maciej, Sokół, Justyna M., Swaczyna, Paweł, Tokumaru, Munetoshi   +3 more
core   +2 more sources

Correlation Patterns of Muon Flux With Vertical Atmospheric Profiles: Insights From Monte Carlo Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The production, attenuation, and absorption of secondary cosmic rays (SCR) are influenced by atmospheric parameters such as air pressure and temperature. To reliably correlate SCR flux measurements with atmospheric ionization driven by energetic particle precipitation, these dependencies must be quantified.
A. Al‐Qaaod, V. Pierrard, A. Winant, U. Stolzenberg, I. Ambrozova, M. Sommer, J. Slegl, J. Solc, A. Gkikoudi, A. G. Georgakilas, A. Papayannis, F. S. Krasniqi   +11 more
wiley   +1 more source

Diffractive and refractive timescales at 4.8 GHz in PSR B0329+54

, 2011
We present the results of flux density monitoring of PSR B0329+54 at the frequency of 4.8 GHz using the 32-meter TCfA radiotelescope. The observations were conducted between 2002 and 2005.
Bhat, Cordes, Cordes, Esamdin, Gupta, Gupta, Gupta, Hewish, J. Kijak, K. Krzeszowski, Kaspi, Konacki, Kramer, Malofeev, Maron, Rickett, Rickett, Romani, Shishov, Sieber, Simonetti, Stinebring, Stinebring, Stinebring, W. Lewandowski, Wang, Wang, Y. Gupta   +27 more
core   +1 more source

Rapid interstellar scintillation of PKS B1257-326: two-station pattern time delays and constraints on scattering and microarcsecond source structure [PDF]

, 2006
We report measurements of time delays of up to 8 minutes in the centimeter wavelength variability patterns of the intra-hour scintillating quasar PKS 1257-326 as observed between the VLA and the ATCA on three separate epochs.
Anastasios K. Tzioumis, Coles W. A., David L. Jauncey, Hayley E. Bignall, James E. J. Lovell, Jean‐Pierre Macquart, Lucyna Kedziora‐Chudczer, Rickett B. J.   +7 more
core   +2 more sources

Sleep and Dreams as Reflected by Science Fiction Literature and Films—Anything to Learn From?

Journal of Sleep Research, Volume 34, Issue 5, October 2025.
ABSTRACT Sleep and dreams are frequent themes in science fiction (Sci‐Fi) literature and films, often used to explore questions about consciousness, reality, technology and the human experience. Sci‐Fi authors and filmmakers utilise the enigmatic nature of sleep and dreams to blur the boundaries between reality and imagination, raising philosophical ...
Dieter Riemann, Christoph Nissen, Pierre A. Geoffroy, Bernd Feige, Jason Ellis   +4 more
wiley   +1 more source

Single Epoch Measurements of Dispersion Measure Gradients towards PSR B0834+06

The Astrophysical Journal
Understanding the evolution of pulsar dispersion measures is vital to high-precision timing experiments, as well as astrometric experiments to determine pulsar positions and proper motions.
Daniel Baker, Ue-Li Pen
doaj   +1 more source

Intra-Day Variability Observations of Two Dozens of Blazars at 4.8 GHz

Universe, 2021
Two dozens of radio loud active galactic nuclei (AGNs) have been observed with Urumqi 25 m radio telescope in order to search for intra-day variability (IDV).
Xiang Liu, Xin Wang, Ning Chang, Jun Liu, Lang Cui, Xiaofeng Yang, Thomas P. Krichbaum   +6 more
doaj   +1 more source

Latitudinal Dependence of the Solar Wind During Periods of High and Low Activity Through Interplanetary Scintillation

Space Weather, Volume 23, Issue 7, July 2025.
Abstract We present a study of the solar wind over different periods of the solar cycle, specifically focusing on the minimum between solar cycles 24 and 25, and the active, ascending phase of solar cycle 25. With the use of interplanetary scintillation (IPS) data taken by the Murchison Widefield Array (MWA) from mid‐2019 and early 2023, we have ...
A. Waszewski, J. S. Morgan, R. Ekers, M. Johnston‐Hollitt, M. C. M. Cheung, N. D. R. Bhat, R. Chhetri, S. C. Fu   +7 more
wiley   +1 more source

Interstellar Scintillation Monitoring of the RadioAstron Blazars [PDF]

Proceedings of 14th European VLBI Network Symposium & Users Meeting — PoS(EVN2018), 2019
The RadioAstron space radio telescope provides a unique opportunity to study the extreme brightness temperatures ($\mathrm{T_B }$) in AGNs with unprecedented long baselines of up to 28 Earth diameters. Since interstellar scintillation (ISS) may affect the visibilities observed with space VLBI (sVLBI), a complementary ground based flux density ...
Liu, J., Krichbaum, T., Bignall, H., Liu, X., Kraus, A., Kovalev, Y., Sokolovsky, K., Cimò, G., Zensus, J.   +8 more
openaire   +3 more sources

BL LAC PKSB1144-379 an extreme scintillator

, 2012
Rapid variability in the radio flux density of the BL Lac object PKSB1144-379 has been observed at four frequencies, ranging from 1.5 to 15 GHz, with the VLA and the University of Tasmania's Ceduna antenna.
Baars, Bignall, Bolton, Camenzind, Cordes, Dennett-Thorpe, Gardner, Kedziora-Chudczer, Lovell, Lovell, Ma, McCulloch, Nicolson, Senkbeil, Shimmins, Stickel, Stinebring   +16 more
core   +1 more source