Results 11 to 20 of about 6,025 (156)

The Reaction of Muonium with Hydrogen Peroxide in Aqueous Solution

ChemPhysChem, Volume 24, Issue 21, November 2, 2023., 2023
Experimental data on muonium kinetics in water greatly expands the set of experimental data on kinetic isotope effects in the reactions of H atoms with H2O2 and its conjugate base HOO−. Abstract Rate constants for the reactions of muonium (Mu) (the ultralight isotope of the hydrogen atom) with H2O2 in H2O and D2O2 in D2O have been determined at various
Paul W. Percival, Jean‐Claude Brodovitch   +1 more
wiley   +1 more source

Interstellar scintillation of PSR J0437–4715 [PDF]

Astronomy & Astrophysics, 2006
We studied the turbulence spectrum of the local interstellar plasma in the direction of PSR J0437-4715, on the basis of our observations and those reported earlier by others. We combine these data to form a structure function for the variations of phase along the line of sight to the pulsar.
Smirnova, T. V., Gwinn, C. R., Shishov, V. I.   +2 more
openaire   +2 more sources

Resolving Moving Heliospheric Structures Using Interplanetary Scintillation Observations With the Murchison Widefield Array

Space Weather, Volume 21, Issue 10, October 2023., 2023
Abstract We have conducted a blind search in 49 consecutive days of interplanetary scintillation observations made by the Murchison Widefield Array from mid‐2019, with overlapping daily observations approximately East and South‐East of the Sun at an elongation of ∼30° and a field of view of 30°.
A. Waszewski, J. S. Morgan, R. Chhetri, R. Ekers, M. C. M. Cheung, N. D. R. Bhat, M. Johnston‐Hollitt   +6 more
wiley   +1 more source

Unfolding the Neutron Flux Spectrum on the Surface of Mars Using the MSL‐RAD and Odyssey‐HEND Data

Space Weather, Volume 21, Issue 8, August 2023., 2023
Abstract Understanding the long‐term radiation environment at the surface of Mars allows us to estimate the exposure for future robotic and crewed missions. Typically, the radiation environment includes charged particles (i.e., protons and heavier ions) and neutral particles (i.e., gamma rays and secondary neutrons).
L. M. Martinez Sierra, I. Jun, B. Ehresmann, C. Zeitlin, J. Guo, M. Litvak, K. Harshman, D. Hassler, I. G. Mitrofanov, D. Matthiä, S. Loffler   +10 more
wiley   +1 more source

Following the Path of Least Resistance

Perspectives of Earth and Space Scientists, Volume 3, Issue 1, December 2022., 2022
Abstract The reason a path may be the path of least resistance is because it may be the path for which you are most suited. For you it may look like a stroll in the park; for someone else, it may look like climbing Everest. Or vice versa. Taking the “easy” route is not copping out; it is a form of playing to your strength. Here I detail my professional
Donald G. Mitchell
wiley   +1 more source

Pulsar Investigation Using Interstellar Scintillation [PDF]

International Astronomical Union Colloquium, 2001
AbstractWe discuss the resolution of pulsar magnetospheres using interstellar scintillation. The two-dimensional spatial structure of pulsar emission zones can be obtained from analysis of diffractive scintillations at low frequencies. Based on refractive and diffractive scintillation of pulsars we can also reconstruct the distribution of turbulent ...
T.V. Smirnova, V.I. Shishov
openaire   +1 more source

Extremely inverted peaked spectrum radio sources

Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1126-1129, November-December 2021., 2021
Abstract We report our ongoing search for extremely inverted spectrum compact radio galaxies, for which the defining feature in the radio spectrum is not the spectral peak, but instead the slope of the spectrum () in the high‐opacity (i.e., lower frequency) part of the radio spectrum.
Mukul Mhaskey, Surajit Paul, Gopal Krishna   +2 more
wiley   +1 more source

Interstellar Scintillation of Radio Sources as a Probe for Investigations of the Local Interstellar Medium [PDF]

International Astronomical Union Colloquium, 1997
AbstractA possibility of obtaining information on small scale inhomogeneities of the electron component of the local interstellar medium (LISM) is investigated using interstellar scintillations of extragalactic radio sources. We analyse Culgoora array observational data on variability of 190 extragalactic radio sources, covering most of the sky, at 80 ...
N. G. Bochkarev, M. I. Ryabov
openaire   +1 more source

A Multi‐Purpose Heliophysics L4 Mission

Space Weather, Volume 19, Issue 9, September 2021., 2021
Abstract The Earth‐Sun Lagrangian point 4 is a meta‐stable location at 1 AU from the Sun, 60° ahead of Earth's orbit. It has an uninterrupted view of the solar photosphere centered on W60, the Earth's nominal magnetic field connection to the Sun. Such a mission on its own would serve as a solar remote sensing observatory that would oversee the entire ...
A. Posner, C. N. Arge, J. Staub, O. C. StCyr, D. Folta, S. K. Solanki, R. D. T. Strauss, F. Effenberger, A. Gandorfer, B. Heber, C. J. Henney, J. Hirzberger, S. I. Jones, P. Kühl, O. Malandraki, V. J. Sterken   +15 more
wiley   +1 more source

Directionality of the Martian Surface Radiation and Derivation of the Upward Albedo Radiation

Geophysical Research Letters, Volume 48, Issue 15, August 2021., 2021
Abstract Since 2012 August, the Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field which is essential in preparation for future crewed Mars missions. RAD observed radiation dose is influenced by variable topographical features as the rover traverses through the terrain.
Jingnan Guo, Salman Khaksarighiri, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Bent Ehresmann, Cary Zeitlin, Sven Löffler, Daniel Matthiä, Thomas Berger, Günther Reitz, Fred Calef   +10 more
wiley   +1 more source