Results 21 to 30 of about 145,288 (313)

Visible Shapes of Black Holes M87* and SgrA*

open access: yesUniverse, 2020
We review the physical origins for possible visible images of the supermassive black hole M87* in the galaxy M87 and SgrA* in the Milky Way Galaxy. The classical dark black hole shadow of the maximal size is visible in the case of luminous background ...
Vyacheslav I. Dokuchaev   +1 more
doaj   +1 more source

Radiochemical capabilities for astrophysics experiments at the national ignition facility

open access: yesFrontiers in Physics, 2022
The Nuclear and Radiochemistry Group at Lawrence Livermore National Laboratory (LLNL) has developed a suite of diagnostics and techniques that can be used for astrophysics experiments at the National Ignition Facility (NIF).
John D. Despotopulos   +5 more
doaj   +1 more source

The Transformation of a Science by a “Technology”: The Case of Astrophysics and the Introduction of Machine Learning

open access: yesHoST, 2023
This article explores the transformations of an area of scientific research provoked by the introduction of big data and the possibilities to treat them by Artificial Intelligence.
Marcovich Anne, Shinn Terry
doaj   +1 more source

Less Known Results on the Solar System [PDF]

open access: yesINCAS Bulletin, 2021
For a two half millennium evolution of knowledge from the Democrit’s natural, rational atomized material conception to the Newtonian, Maxwellian, Einsteinian mathematized physics, the research in the most cases has followed a deductive route from ...
Horia DUMITRESCU   +2 more
doaj   +1 more source

Classification of unassociated fermi-LAT sources [PDF]

open access: yesITM Web of Conferences, 2022
The Large Area Telescope (LAT) on board NASA’s Fermi Gamma-ray Space telescope has detected 5788 sources in the 4FGL catalogue. Among them, 271 have been associated to pulsars, 3436 to blazars, and 1782 remain unassociated sources.
Meng Qiyu
doaj   +1 more source

Astrophysics in 1993 [PDF]

open access: yesPublications of the Astronomical Society of the Pacific, 1994
Publications of the Astronomical Society of the Pacific Vol.106 1894 January No. 695 Publications of the Astronomical Society of the Pacific 106: 1-24, 1994 January Invited Review Paper Astrophysics in 1993 Virginia Trimble 1 and Peter J. T. Leonard 2 Astronomy Department, University of Maryland, College Park, Maryland 20742 Received 1993 October 8 ...
Trimble, Virginia, Leonard, Peter JT
openaire   +3 more sources

Nuclear astrophysics

open access: yesReports on Progress in Physics, 1999
Nuclear astrophysics is that branch of astrophysics which helps understanding some of the many facets of the Universe through the knowledge of the microcosm of the atomic nucleus. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress in the modelling of the structure and evolution of the ...
Arnould, Marcel, Takahashi, KOHJI
openaire   +3 more sources

Fictions, Conditionals, and Stellar Astrophysics [PDF]

open access: yes, 2013
This article argues in favour of an inferential role for fictions in scientific modelling. The argument proceeds by means of a detailed case study, namely models of the internal structure of stars in stellar astrophysics.
Suárez, Mauricio, Mauricio Suárez
core   +1 more source

Nonlinear Spectroscopy of Alkali Atoms in Cold Medium of Astrophysical Relevance

open access: yesAtoms, 2017
The time-dependent population dynamics of hyperfine (HF) sublevels of n 2 p 3 / 2 atomic states upon laser excitation in a cold medium of alkali atoms is examined.
Dmitry K. Efimov   +7 more
doaj   +1 more source

Testing Noncommutativity-Like Model as a Galactic Density Profile

open access: yesGalaxies, 2021
Noncommutative-like model (NC-like) is an interesting alternative inspired by string theory to understand and describe the velocity rotation curves of galaxies without the inclusion of dark matter particles.
Juan Jordi Ancona-Flores   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy