Results 61 to 70 of about 180,573 (206)
The influence of extragalactic magnetic fields on the propagation of cosmic rays from Centaurus A [PDF]
, 2011 The motion of different chemical composition of ultra high energy cosmic rays in the galactic magnetic fields with taking into account the extragalactic magnetic field was considered.
Marchenko, V. +4 more
core +2 more sources
Astronomy & Astrophysics (CAUCASUS)-VOLUME 4
, 2018 The IV volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Victor Hambardzumyan. AcademicianVictor Hambardzumyan President of International Union of Astronomy (in 1961 – 1964 and 1966 – 72 ...
(CAUCASUS), Astronomy & Astrophysics
core +1 more source
Thermal InfraRed surveys from Antarctica for extragalactic astronomy
, 2007 The outstanding atmospheric conditions of the Dome C give a unique opportunity to survey deeply large areas of the sky in the thermal infrared reaching interesting sensitivity limits for extragalactic astronomy.
N. Gavrilović +5 more
core +1 more source
Advances in Astronomy, Volume 2025, Issue 1, 2025.The Chelyabinsk meteor entered Earth’s atmosphere on 15 February 2013, producing a shock wave that injured about 1500 people and damaged thousands of buildings. Despite its relatively large size (∼20 m), the progenitor asteroid approached Earth undetected. Its apparent radiant was too close to the Sun for standard ground‐based near‐Earth asteroid (NEA)
Thomas Müller +9 more
wiley +1 more source
An Extragalactic Widefield Search for Technosignatures with the Murchison Widefield Array
The Astrophysical JournalIt is common for surveys that are designed to find artificial signals generated by distant civilizations to focus on galactic sources. Recently, researchers have started focusing on searching for all other sources within the field observed, including the
C. D. Tremblay, S. J. Tingay
doaj +1 more source
Antimatter Gravity and the Results of the ALPHA‐g Experiment
Annalen der Physik, Volume 536, Issue 7, July 2024.The recent results of the ALPHA‐g experiment, which show gravitational attraction between antihydrogen atoms and the Earth, seem to undermine the success of repulsive‐gravity models in the cosmological field. Analyzing the theory of CPT gravity, two solutions are found that are consistent with the experimental results, while preserving the large‐scale ...
Massimo Villata
wiley +1 more source
The dynamics of molecular gas in nearby galaxies [PDF]
, 2013 Includes abstract.
Frank, Bradley Stanton
core +1 more source
Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers
Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto +9 more
wiley +1 more source
Kant and extragalactic revolution in astronomy
Theoria, Beograd, 2004 In this paper we briefly consider the role Kant's early philosophy, and notably his "island universes" hypothesis played in the history of astronomy. There are many reasons for this, including the coincidence of Kant's jubilee year with 80 years since Hubble's discovery (1924) of the extragalactic universe.
openaire +1 more source
Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.Abstract We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against ...
L. R. Bedin +11 more
wiley +1 more source