Results 61 to 70 of about 39,097 (209)

Interstellar Scattering of the VELA Pulsar

The Astrophysical Journal, 1974
The frequency dependence of the parameters of interstellar scattering between 837 and 8085 MHz for the Vela pulsar are consistent with thin-screen models of strong scattering. The magnitudes of the parameters indicate an anomalous turbulence along the path when they are compared with results for other pulsars with comparable column densities of free ...
openaire   +1 more source

Influence of Mars Topography on Radiation Dose Detected by the Mars Science Laboratory and Assessment of Mars Surface Albedo Radiation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field since 2012. The dose observed by RAD is influenced by a variety of factors, including an essential one, the terrain. After parking near Murray Buttes in September 2016 where it first detected a ∼5% decrease in dose rate ...
Jingnan Guo, Changqi Tian, Gabin Charpentier, Robert F. Wimmer‐Schweingruber, Salman Khaksarighiri, Lu Pan, Jan Leo Löwe, Bent Ehresmann, Donald M. Hassler, Cary Zeitlin, Daniel Matthiä, Thomas Berger, Günther Reitz   +12 more
wiley   +1 more source

Scattering, Migration, Recircularization and Relaxation to Build out Galaxy Disks with Exponential Profiles

The Astrophysical Journal
Scattering of stars by interstellar clouds or massive clumps increases the stellar velocity dispersion and promotes a radial disk profile that is exponential.
Curtis Struck, Bruce G. Elmegreen, Elena D’Onghia   +2 more
doaj   +1 more source

The density distribution and 58.4 nm radiation intensity of interstellar helium in the heliosphere: a model simulation

Earth and Planetary Physics
Research on the interstellar medium and its interaction with the solar system constitutes a significant topic in planetary physics. As the Sun traverses the local interstellar cloud, interstellar neutrals penetrate the heliosphere, forming the ...
JiaLing Lyu, ChongJing Yuan, Fei He, BeiLi Ying   +3 more
doaj   +1 more source

Cosmic Ray Scattering in Compressible Turbulence

, 2006
We study the scattering of low-energy Cosmic Rays (CRs) in a turbulent, compressive MHD fluid. We show that compressible MHD modes -- fast or slow waves with wave lengths smaller than CR mean free paths induce cyclotron instability in CRs.
A. Beresnyak, A. Lazarian, Barnes, Beresnyak, Bieber, Biskamp, Boldyrev, Boldyrev, Brunetti, Cassano, Chandran, Chew, Cho, Cho, Cho, Cho, Cho, Cho, Esslin, Farmer, Gary, Ginzburg, Goldreich, Higdon, Jokipii, Kaplan, Kulsrud, Kulsrud, Lazarian, Lazarian, Lerche, Lithwick, Longair, Maron, Melrose, Mikhailovskii, Müller, Müller, Petrosian, Sagdeev, Schekochihin, Schlickeiser, Shalchi, Shebalin, Yan, Yan, Zank   +46 more
core   +1 more source

Interstellar Scattering And The Einstein Ring PKS 1830-211 [PDF]

Symposium - International Astronomical Union, 1996
The remarkably strong radio gravitational lens PKS 1830-211 consists of a one arcsecond diameter Einstein ring with two bright compact components located on opposite sides of the ring. We have obtained 22 GHz VLBA data on this source to determine the intrinsic angular sizes of the compact components.
D. L. Jones, R. A. Preston, D. W. Murphy, D. L. Meier, D. L. Jauncey, J. E. Reynolds, A. K. Tzioumis   +6 more
openaire   +1 more source

Model calculations for cosmogenic nuclides in meteorites and the lunar surface. 1. Long‐lived radionuclides

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 600-620, April 2026.
Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley   +1 more source

Early Grain Growth in the Young Protostellar Disk HH 212 Supported by Dust Self-scattering Modeling

The Astrophysical Journal
Grain growth in disks around young stars plays a crucial role in the formation of planets. Early grain growth has been suggested in the HH 212 protostellar disk by previous polarization observations.
Ying-Chi Hu, Chin-Fei Lee, Zhe-Yu Daniel Lin, Zhi-Yun Li, John J. Tobin, Shih-Ping Lai   +5 more
doaj   +1 more source

Analytic formulas for frequency and size dependence of absorption and scattering efficiencies of astronomical polycyclic aromatic hydrocarbons

, 2012
In a series of two recent papers, the frequency and size distribution dependence of extinction spectra for astronomical silicate and graphite grains was analyzed by us in the context of MRN type interstellar dust models.
Ashim K. Roy, Cardelli, Cecchi-Pestellini, Donn, Draine, Draine, Draine, Fitzpatrick, Klacka, Li, Li, Li, Mathis, Pendorf, Platt, Pritesh Ranadive, Ranjan Gupta, Roy, Roy, Subodh K. Sharma, Weingartner   +20 more
core   +1 more source

O and Ne K absorption edge structures and interstellar abundance towards Cyg X-2 [PDF]

, 2002
We have studied the O and Ne absorption features in the X-ray spectrum of Cyg X-2 observed with the Chandra LETG. The O absorption edge is represented by the sum of three absorption-edge components within the limit of the energy resolution and the photon
Crovisier J., Kazuhisa Mitsuda, Koch-Miramond L., Predehl P., Ryuichi Fujimoto, Takashi Onaka, Verner D. A., Yoh Takei   +7 more
core   +2 more sources