Results 31 to 40 of about 711 (153)

The Origin of Galactic Cosmic Rays [PDF]

, 1995
Motivated by recent measurements of the major components of the cosmic radiation around 10 TeV/nucleon and above, we discuss the phenomenology of a model in which there are two distinct kinds of cosmic ray accelerators in the galaxy.
D. Müller, E. S. Seo, H.J. Völk, H.J. Völk, J.C. Wheeler, J.J. Engelmann, J.P. Rachen, K. Asakimori, M. Ichimura, M.J. Ryan, M.J. Ryan, N. Lund, P.L. Biermann, P.L. Biermann, P.L. Biermann, Peter L. Biermann, R. Silberberg, S. Yanagita, S.P. Swordy, T. K. Gaisser, T. Stanev, Todor Stanev, W.R. Webber, W.R. Webber, W.R. Webber, Y. Kawamura   +25 more
core   +2 more sources

Non-monotonic spatial distribution of the interstellar dust in astrospheres: finite gyroradius effect [PDF]

, 2016
High-resolution mid-infrared observations of astrospheres show that many of them have filamentary (cirrus-like) structure. Using numerical models of dust dynamics in astrospheres, we suggest that their filamentary structure might be related to specific ...
O. Katushkina, D. Alexashov, V. Izmodenov, V. Gvaramadze   +3 more
semanticscholar   +1 more source

THE ASTROSPHERE OF THE ASYMPTOTIC GIANT BRANCH STAR IRC+10216 [PDF]

The Astrophysical Journal, 2010
We have discovered a very extended shock structure (i.e., with a diameter of about 24 arcmin) surrounding the well-known carbon star IRC+10216 in ultraviolet images taken with the GALEX satellite. We conclude that this structure results from the interaction of IRC+10216's molecular wind with the interstellar medium (ISM), as it moves through the latter.
Sahai, Raghvendra, Chronopoulos, Christopher K.   +1 more
openaire   +2 more sources

On stellar activity cycle-related cosmic ray modulation effects in the astrosphere of Proxima Centauri

Journal of Space Weather and Space Climate
In the heliosphere, solar cycle-related changes in galactic cosmic ray (GCR) intensities have long been known to arise as a direct consequence of solar cyclic changes in, for example, the heliospheric magnetic field and the solar tilt angle.
Engelbrecht Nicholas Eugene, Herbst Konstantin   +1 more
doaj   +1 more source

High Stellar FUV/NUV Ratio and Oxygen Contents in the Atmospheres of Potentially Habitable Planets [PDF]

, 2013
Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O2 and O3) of potentially habitable planets in this type of UV ...
France, Kevin, Linsky, Jeffrey L., Mauas, Pablo J. D., Tian, Feng, Vieytes, Mariela C.   +4 more
core   +2 more sources

Thin current sheets caused by plasma flow gradients in space and astrophysical plasma [PDF]

, 2010
Strong gradients in plasma flows play a major role in space and astrophysical plasmas. A typical situation is that a static plasma equilibrium is surrounded by a plasma flow, which can lead to strong plasma flow gradients at the separatrices between ...
Nickeler, Dieter H., Wiegelmann, Thomas
core   +2 more sources

Complementary interstellar detections from the heliotail

Frontiers in Astronomy and Space Sciences
The heliosphere is a protective shield around the solar system created by the Sun’s interaction with the local interstellar medium (LISM) through the solar wind, transients, and interplanetary magnetic field.
Sarah A. Spitzer, Marc Z. Kornbleuth, Merav Opher, Jason A. Gilbert, Jim M. Raines, Susan T. Lepri   +5 more
doaj   +1 more source

Lyman-alpha observations of astrospheres

, 2014
Charge-exchange reactions between outflowing stellar wind protons and interstellar neutral hydrogen atoms entering a stellar astrosphere produce a region of piled-up-decelerated neutral hydrogen called the hydrogen wall. Absorption by this gas, which is observed in stellar Lyman-alpha emission lines, provides the only viable technique at this time for ...
Linsky, Jeffrey L., Wood, Brian E.
openaire   +2 more sources

Evidence of a Thick Heliopause Boundary Layer Resulting from Active Magnetic Reconnection with the Interstellar Medium

The Astrophysical Journal
Voyager 1 and 2 data from the vicinity of the heliopause and very local interstellar medium are reexamined to better understand the confounding lack of rotation in the magnetic field ( B -field) across the heliopause observed by both Voyagers, despite ...
Drew L. Turner, Adam Michael, Elena Provornikova, Marc Kornbleuth, Merav Opher, Stefan Eriksson, Benoit Lavraud, Parisa Mostafavi, Matthew E. Hill, Pontus Brandt, Ian J. Cohen, Joseph Westlake, John D. Richardson, Nathan A. Schwadron, David J. McComas   +14 more
doaj   +1 more source

Evidence for an interstellar dust filament in the outer heliosheath

, 2015
A recently discovered filament of polarized starlight that traces a coherent magnetic field is shown to have several properties that are consistent with an origin in the outer heliosheath of the heliosphere: (1) The magnetic field that provides the best ...
Andersson, B-G, Berdyugin, A., Frisch, P. C., Funsten, H. O., Magalhaes, A. M., McComas, D. J., Piirola, V., Schwadron, N. A., Seriacopi, D. B., Slavin, J. D., Wiktorowicz, S. J.   +10 more
core   +1 more source