Results 41 to 50 of about 221 (127)

On the Comprehensive 3D Modeling of the Radiation Environment of Proxima Centauri b: A New Constraint on Habitability?

open access: yesThe Astrophysical Journal
The combined influence of stellar energetic particles and galactic cosmic rays (GCRs) on the radiation environment, and hence potential habitability, of Earth-like exoplanets is relatively unknown.
N. Eugene Engelbrecht   +5 more
doaj   +1 more source

Comparative collisionless shocks beyond Earth

open access: yes, 2022
Collisionless shock waves are an ubiquitous phenomena occurring upstream of planetary magnetospheres, cometary bodies, coronal mass ejections (CMEs), and astrospheres.
Wilson, Lynn B., III
core   +1 more source

Voyager VLISM Electron Density Dataset

open access: yesThe Astrophysical Journal Supplement Series
This paper is a companion to an electron density dataset submitted to both the Planetary Data System and the Space Physics Data Facility for measurements by the Voyager Plasma Wave Science (PWS) instrument in the very local interstellar medium.
W. S. Kurth, L. J. Granroth, J. B. Faden
doaj   +1 more source

Particle Transport from First Principles in the Early Heliosphere: κ1 Ceti as a Case Study for the Young Sun

open access: yesThe Astrophysical Journal
Several studies of Galactic cosmic-ray (GCR) modulation within the astrospheres of stars deemed to be proxies for the young Sun have concluded that the intensities of these particles would, at early stages of the Sun’s evolution, be negligible at 1 au ...
N. Eugene Engelbrecht   +4 more
doaj   +1 more source

The Passage of the Solar System through the Edge of the Local Bubble

open access: yesThe Astrophysical Journal
The Sun moves through the interstellar medium (ISM) at a velocity of ∼19 pc Myr ^−1 , making the conditions outside the solar system vary with time over millions of years.
Merav Opher   +12 more
doaj   +1 more source

New Mass-Loss Measurements from Astrospheric Lyα Absorption [PDF]

open access: yesThe Astrophysical Journal, 2005
Measurements of stellar mass-loss rates are used to assess how wind strength varies with coronal activity and age for solar-like stars. Mass loss generally increases with activity, but we find evidence that winds suddenly weaken at a certain activity threshold.
B. E. Wood   +4 more
openaire   +1 more source

The Global Structure of the Heliosphere

open access: yesThe Astrophysical Journal
As the Sun moves through the local interstellar medium (LISM), it emits charged particles, creating the heliosphere occupied by the plasma of solar origin.
Nikolai V. Pogorelov   +3 more
doaj   +1 more source

Magnetic Trapping of Galactic Cosmic Rays in the Outer Heliosheath and Their Preferential Entry into the Heliosphere

open access: yesThe Astrophysical Journal
This paper examines the geometry of interstellar magnetic field lines close to the boundary of the heliosphere in the direction of the unperturbed local interstellar magnetic field, where the field lines are spread apart by the heliopause (HP).
Vladimir Florinski   +12 more
doaj   +1 more source

A Search for Lyα Emission from the Astrosphere of 40 Eridani A

open access: yesThe Astrophysical Journal, 2003
We report the results of Hubble Space Telescope (HST) observations of the nearby (d = 5.0 pc) K1 V star 40 Eri A, which we use to search for scattered Lyα emission surrounding the star indicative of the interaction between the stellar wind and the interstellar medium (ISM).
Brian E. Wood   +3 more
openaire   +1 more source

Signatures of Reconnection and a Split Heliospheric Tail in High-energy Energetic Neutral Atoms

open access: yesThe Astrophysical Journal
The shape of the heliosphere, regarded as comet-like since the 1960s, has recently been the subject of intense debate in the last decade. There is disagreement as to whether the heliospheric tail extends to ∼10,000 au in a comet-like shape or if it is ...
M. Kornbleuth   +12 more
doaj   +1 more source

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