Results 61 to 70 of about 79,833 (199)

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

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

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

Interstellar Scintillations of Polarization of Compact Sources

The Astrophysical Journal, 2000
We demostrate that the measurement of fluctuations of polarization due to the galactic interstellar scintillations may be used to study the structure of the radiation field at compact radio sources. We develop a mathematical formalism and demonstrate it on a simple analytical model in which the scale of the polarization variation through the source is ...
openaire   +3 more sources

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

The formation of molecular hydrogen in the interstellar medium [PDF]

, 2010
H2 is the most abundant molecule in the interstellar medium and forms on the surface of interstellar dust grains. Laboratory studies have been conducted of HD formation on a dust grain analogue, which is a highly-oriented pyrolytic graphite surface ...
Islam, F.
core  

Robust radiocarbon dating of wood samples by high-sensitivity liquid scintillation spectroscopy in the 50–70 kyr age range [PDF]

, 2007
Although high-sensitivity liquid scintillation (LS) spectroscopy is theoretically capable of producing finite radiocarbon ages in the 50,000- to 70,000-yr range, there is little evidence in the literature that meaningful dates in this time period have ...
Palmer, Jonathan G., Turney, Chris S.M., Turney, Chris S. M., Fifield, L. Keith, Turney, Chris S. M.; id_orcid, Hogg, Alan G., Galbraith, Rex, Palmer, Johnathan G.   +7 more
core   +1 more source

Probing the Interstellar Medium from Scintillation of the Swooshing Pulsar B0919+06

The Astrophysical Journal
Radio observations of pulsars offer a potential method to probe the intricate microstructure in the turbulent interstellar medium. Here we report on a high-resolution dynamic spectral analysis of the “swooshing pulsar” B0919+06 observed with the Five ...
Z. Wang, Z. G. Wen, J. P. Yuan, N. Wang, Z. Wang, J. L. Chen, H. G. Wang, W. Han, H. Wang, X. F. Duan, C. B. Lyu, J. P. Wang, Z. W. Wu   +12 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

Associations between Scattering Screens and Interstellar Medium Filaments

The Astrophysical Journal
Pulsar scintillation can be used to measure small-scale structure in the Galaxy, but little is known about the specific interstellar medium (ISM) features that cause scintillation.
Ashley M. Stock, Marten H. van Kerkwijk
doaj   +1 more source