Results 41 to 50 of about 711 (153)
The Sun's Journey Through the Local Interstellar Medium: The PaleoLISM and Paleoheliosphere
, 2006 Over the recent past, the galactic environment of the Sun has differed substantially from today. Sometime within the past ~130,000 years, and possibly as recent as ~56,000 years ago, the Sun entered the tenuous tepid partially ionized interstellar ...
Frisch, P. C., Slavin, J. D.
core +2 more sources
A Closer Earth and the Faint Young Sun Paradox: Modification of the Laws of Gravitation, or Sun/Earth Mass Losses? [PDF]
, 2013 Given a solar luminosity L_Ar = 0.75 L_0 at the beginning of the Archean 3.8 Gyr ago, where L_0 is the present-day one, if the heliocentric distance r of the Earth was r_Ar = 0.956 r_0, the solar irradiance would have been as large as I_Ar = 0.82 I_0. It
Iorio, Lorenzo
core +2 more sources
Deexcitation nuclear gamma-ray line emission from low-energy cosmic rays in the inner Galaxy [PDF]
, 2012 Recent observations of high ionization rates of molecular hydrogen in diffuse interstellar clouds point to a distinct low-energy cosmic-ray component.
Benhabiles-Mezhoud, H. +3 more
core +5 more sources
The Astrophysical JournalThe 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
The Space Environment and Atmospheric Joule Heating of the Habitable Zone Exoplanet TOI700-d
, 2020 We investigate the space environment conditions near the Earth-size planet TOI~700~d using a set of numerical models for the stellar corona and wind, the planetary magnetosphere, and the planetary ionosphere.
Alvarado-Gomez, J. +6 more
core +1 more source
Cosmic rays as regulators of molecular cloud properties
, 2014 Cosmic rays are the main agents in controlling the chemical evolution and setting the ambipolar diffusion time of a molecular cloud. We summarise the processes causing the energy degradation of cosmic rays due to their interaction with molecular hydrogen,
Galli, Daniele +2 more
core +1 more source
Voyager VLISM Electron Density Dataset
The Astrophysical Journal Supplement SeriesThis 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
The Astrophysical JournalSeveral 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
, 2014 Important insights into the formation, structure, evolution and environment of all types of stars can be obtained through the measurement of their winds and possible magnetospheres.
Baade, D. +12 more
core +4 more sources
Examining simulated MHD shock structures of astrospheres
, 2022 In dieser Arbeit werden verschiedene Untersuchungen an magnetohydrodynamischen Modellen von Astrosphären (ASn) präsentiert. Die Schockstrukturen der ASn um vier Sterne, den schnell-laufenden O-Stern \(\lambda\) Cephei, die Sonne, unseren nächsten Nachbarn Proxima Centauri, und den M-Stern LHS 1140, wurden untersucht. Eine Methode zur Projektion von ASn,
openaire +2 more sources