Results 11 to 20 of about 207,262 (276)
Lorentz Symmetry Violation of Cosmic Photons
Universe, 2022 As a basic symmetry of space-time, Lorentz symmetry has played important roles in various fields of physics, and it is a glamorous question whether Lorentz symmetry breaks.
Ping He, Bo-Qiang Ma
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Synonymy of art history terms: synonyms, variants or competitors for a place in the system
Дискурс профессиональной коммуникации, 2023 The relevance of this study is preconditioned by the appeal to the problem of the development of the term semantics on the example of synonymy in the framework of modern terminology of art history.
S. V. Ivanova, P. E. Dovgopiat
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Proper motion of Cygnus Loop shock filaments [PDF]
Serbian Astronomical Journal, 2023 We determined the shock speed in the Galactic supernova remnant Cygnus Loop, using the proper motion of its optical filaments and the latest estimate of its distance.
Vučetić M. +6 more
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PLoS ONE, 2021 In the 1920s, during the first archaeological excavations at Uaxactún, Petén, Guatemala, an architectural complex named Group E was interpreted as an ancient Maya astronomical observatory, intended specifically for sighting the equinoctial and solstitial
Ivan Šprajc
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Technical note: On seasonal variability of the M2 tide [PDF]
Ocean Science, 2022 Seasonal variability of the M2 ocean tide can be detected at many ports, perhaps most. Examination of the cluster of tidal constituents residing within the M2 tidal group can shed light on the physical mechanisms underlying seasonality.
R. D. Ray
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Exact solutions for the spatial de Vaucouleurs and Sersic laws and related quantities [PDF]
, 2001 Using the Mathematica package, we find exact analytical expressions for the so-called de-projected De Vaucouleurs and Sersic laws as well as for related spatial (3D) quantities, such the mass, gravitational potential, the total energy and the central ...
A. Mazure +10 more
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The Effect of the Position of the Stars on Human Drawings in Two Versions of Suwar al-Kawākib in the 9th Century AH/15th Century AD [PDF]
نگره, 2023 "Kitab Suwar Al-Kawākib" (Book of Fixed Stars) written by Abd al-Rahman Sufi Razi (291-376 AH/903-986 AD) is one of the most famous books of ancient astronomy.
S. Ali asghar Rabani +1 more
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The 11.2 $\mu$m emission of PAHs in astrophysical objects [PDF]
, 2015 The 11.2 $\mu$m emission band belongs to the family of the `Unidentified' Infrared (UIR) emission bands seen in many astronomical environments. In this work we present a theoretical interpretation of the band characteristics and profile variation for a ...
Candian, A., Sarre, P. J.
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Ms. Hisako Koyama: From Amateur Astronomer to Long‐Term Solar Observer [PDF]
Space Weather, 2017 AbstractThe path to science for a girl of any nationality born in the early twentieth century was formidable‐to‐nonexistent. Yet paths were forged by a few. We present the little‐known story of one of Japan's premier solar observers and her contribution to the world's understanding of sunspots and space weather cycles. Ms.
Delores Knipp +2 more
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Spatial & Temporal Characteristics of Ha flares during the period 1975-2002 (comparison with SXR flares) [PDF]
, 2006 Although the energetic phenomena of the Sun (flares, coronal mass injections etc.) exhibit intermittent stochastic behavior in their rate of occurrence, they are well correlated to the variations of the solar cycle.
Gini, E. +4 more
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