Results 41 to 50 of about 422,001 (171)

Estimated equivalent radiation dose at different altitudes in Earth’s atmosphere

Solar-Terrestrial Physics, 2022
The paper reports the results of simulation of cosmic ray proton transport through Earth’s atmosphere. The main objective of this work is to obtain characteristics of secondary particle fluxes at different altitudes and to convert them to equivalent dose
Maurchev E. A., Mikhalko E. A., Balabin Y. V., Germanenko A. V., Gvozdevsky B. B.   +4 more
doaj   +1 more source

Astrophysical symmetries [PDF]

Proceedings of the National Academy of Sciences, 1996
Astrophysical objects, ranging from meteorites to the entire universe, can be classified into about a dozen characteristic morphologies, at least as seen by a blurry eye. Some patterns exist over an enormously wide range of distance scales, apparently as a result of similar underlying physics.
openaire   +4 more sources

Challenges of Relativistic Astrophysics

, 2013
I discuss some of the most outstanding challenges in relativistic astrophysics in the subjects of: compact objects (Black Holes and Neutron Stars); dark sector (Dark Matter and Dark Energy); plasma astrophysics (Origin of Jets, Cosmic Rays and Magnetic ...
Opher, Reuven
core   +1 more source

Nuclear astrophysics studies with ultra-peripheral heavy-ion collisions

, 2009
I describe in very simple terms the theoretical tools needed to investigate ultra-peripheral nuclear reactions for nuclear astrophysics purposes. For a more detailed account, see arXiv:0908.4307.Comment: 12 pages, 8 figures, Lecture notes presented at ...
Bertulani, C. A.
core   +1 more source

Axion astrophysics

Physics Reports
Stars have been recognized as optimal laboratories to probe axion properties. In the last decades there have been significant advances in this field due to a better modelling of stellar systems and accurate observational data. In this work we review the current status of constraints on axions from stellar physics.
Pierluca Carenza, Maurizio Giannotti, Jordi Isern, Alessandro Mirizzi, Oscar Straniero   +4 more
openaire   +4 more sources

Multimessenger Studies with the Pierre Auger Observatory

Particles
The Pierre Auger Observatory, the world’s largest ultra-high-energy (UHE) cosmic ray (CR) detector, plays a crucial role in multi-messenger astroparticle physics with its high sensitivity to UHE photons and neutrinos.
Jon Paul Lundquist, the Pierre Auger Collaboration   +1 more
doaj   +1 more source

Spitzer Resurrector Mission: Advantages for Space Weather Research and Operations

Aerospace
In 1979, NASA established the Great Observatory program, which included four telescopes (Hubble, Compton, Chandra, and Spitzer) to explore the Universe.
Shawn M. Usman, Giovanni G. Fazio, Christopher A. Grasso, Ryan C. Hickox, Cameo Lance, William B. Rideout, Daveanand M. Singh, Howard A. Smith, Angelos Vourlidas, Joseph L. Hora, Gary J. Melnick, Matthew Ashby, Volker Tolls, Steven Willner, Salma Benitez   +14 more
doaj   +1 more source

Massive Black Hole Formation in Proto-Stellar Clusters via Early Gas Accretion

Particles
In this paper, we review our semi-analytic model of stellar black hole (BH) mass growth via gas accretion in gas-rich stellar clusters during their birthstage within the first ∼10Myr after the first stellar formation event.
Zacharias Roupas
doaj   +1 more source

Narrating the origin of the universe through music: A case study [PDF]

Zbornik Radova Akademije Umetnosti, 2017
Our project is about the synthesis of a musical piece, based on the timeline of the Universe. We can understand music through visual and gestural analogies.
Mannone Maria, Gkoudina Kyriaki, Tyler Evan   +2 more
doaj  

The Euler’s harmonic holomorphic regenerative universe [PDF]

INCAS Bulletin
The Cartesian dualism is a precursor to Euler’s complex theory, that completes the Descartes-Leibnitz monadic conception using the natural quanta (non-splitting e, π) along with their topological torsion in the form of dual isomorphism.
Horia DUMITRESCU, Vladimir CARDOS, Radu BOGATEANU   +2 more
doaj   +1 more source