Results 71 to 80 of about 1,203,998 (246)

Modeling of Interstellar Dust Grains [PDF]

, 2008
Dust has two major effects on light passing through the Interstellar Medium - Interstellar Extinction and Reddening. Interstellar dust grains are typically a fraction of a micron, approximately the wavelength of blue light and hence light passing ...
Rao, Nagalakshmi A.
core   +1 more source

On Detecting Interstellar Scintillation in Narrowband Radio SETI

The Astrophysical Journal, 2023
To date, the search for radio technosignatures has focused on sky location as a primary discriminant between technosignature candidates and anthropogenic radio frequency interference (RFI).
Bryan Brzycki, Andrew P. V. Siemion, Imke de Pater, James M. Cordes, Vishal Gajjar, Brian Lacki, Sofia Sheikh   +6 more
doaj   +1 more source

Visible/UV Scattering by Interstellar Dust [PDF]

Symposium - International Astronomical Union, 1989
Studies of interstellar dust based on observations of scattered and dust-emitted radiation from grains are reviewed.
openaire   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Interstellar holography [PDF]

, 2008
The dynamic spectrum of a radio pulsar is an in-line digital hologram of the ionized interstellar medium. It has previously been demonstrated that such holograms permit image reconstruction, in the sense that one can determine an approximation to the ...
Stinebring, Daniel R., Walker, M. A., Stinebring, D. R., Koopmans, L. V. E., Koopmans, L., van Straten, W.   +5 more
core   +3 more sources

Space–VLBI observations of the OH maser OH 34.26+0.15: low interstellar scattering [PDF]

, 2000
We report on the first space–VLBI observations of the OH 34.26+0.15 maser in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio ...
V. Slysh, M. Voronkov, V. Migenes, K. Shibata, T. Umemoto, V. Altunin, I. Valtts, B. Kanevsky, M. Popov, A. Kovalenko, E. Fomalont, B. A. Poperechenko, Y. Gorshenkov, B. Carlson, S. Dougherty, J. Reynolds, D. Jiang, A. Smirnov, V. Grachev   +18 more
semanticscholar   +1 more source

Near‐Earth Cosmic Ray Modulation Index ϕ and Neutron Monitor Cutoff Rigidities at Hourly Cadence: Toward an Improved Monitoring of Solar‐Terrestrial Radiation Environment, Space Weather, and Space Climate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic rays (CRs) are energetic particles originating from galactic and extragalactic sources. When arriving into the solar system and the Sun's heliosphere, they are diverted and modulated by the magnetic activity of the Sun. This modulation can be quantified by the modulation parameter ϕ $\phi $ determined with the Force‐field approximation (
Pauli Väisänen, Nicholas Larsen, Sergey Koldobskiy, Markus Similä, David Pelosi, Miguel Orcinha   +5 more
wiley   +1 more source

The Lyα Sky as Observed by New Horizons at 57 au

The Astronomical Journal
During 2023 September the Alice ultraviolet spectrograph on the New Horizons (NH) spacecraft was used to map diffuse Lyα emission over most of the sky, at a range of ∼56.9 au from the Sun.
G. Randall Gladstone, J. Michael Shull, Wayne R. Pryor, Jonathan Slavin, Joshua A. Kammer, Tracy M. Becker, Tod R. Lauer, Marc Postman, John R. Spencer, Joel Wm. Parker, Kurt D. Retherford, Michael A. Velez, Maarten H. Versteeg, Michael W. Davis, Cynthia S. Froning, Camden D. Ertley, Nathaniel Cunningham, Jayant Murthy, Richard C. Henry, Seth Redfield, Carey M. Lisse, Kelsi N. Singer, Anne J. Verbiscer, Pontus C. Brandt, S. Alan Stern   +24 more
doaj   +1 more source

Turbulence and Diffusive Transport of Cosmic Rays in the Very Local Interstellar Medium

The Astrophysical Journal, 2023
We study the transport of fast charged particles, such as galactic cosmic rays, in the very local interstellar medium (VLISM), which is currently being explored by the two Voyager space probes.
V. Florinski, J. G. Alonso Guzman, J. Giacalone, J. A. le Roux, M. Opher   +4 more
doaj   +1 more source

Jovian Auroral Proton Precipitation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The total power of the Jovian aurora is about 1013–1014 W with ultraviolet emission observed in the Lyman and Werner bands of molecular hydrogen. X‐ray, radio, and infrared emissions have also been observed. The Jovian Auroral Distributions Experiment and the Jovian Energetic Particle Detector Instrument onboard the Juno spacecraft, orbiting ...
S. J. Houston, T. E. Cravens, O. Q. Hamil, J. H. Waite, D. R. Schultz   +4 more
wiley   +1 more source