Results 181 to 190 of about 30,254 (217)
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Physics Letters A, 2000
Abstract Here we put forward some arguments in favour of the existence of slow bars. More then a half of spiral galaxies have in their central regions a bar — a structure in the form of triaxial ellipsoid. Historically two models of the bar were developed — those of the so called “slow” and “fast” bars. In both cases the bar is in some resonance with
A.M. Fridman, O.V. Khoruzhii
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Abstract Here we put forward some arguments in favour of the existence of slow bars. More then a half of spiral galaxies have in their central regions a bar — a structure in the form of triaxial ellipsoid. Historically two models of the bar were developed — those of the so called “slow” and “fast” bars. In both cases the bar is in some resonance with
A.M. Fridman, O.V. Khoruzhii
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The barred spiral structure of galaxies
Chinese Astronomy and Astrophysics, 1984Abstract We have carried out a preliminary analysis of barred spirals using a gas-dynamical model. By means of the method of integral transform given in a previous paper [1], an analytical solution has been obtained which is in fair agreement with observations.
Xu Mei, Chen Zhen-cheng, Weng Shi-da
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Barred Spirals and Formation of Spiral Arms by Galaxies
Nature, 1965SO far the formation of spiral arms, especially regular arms, has not been satisfactorily explained. The investigation of this phenomenon can be facilitated by an analysis of similar, but more peculiar, objects—barred spirals. A characteristic barred galaxy has a straight bar, which at the ends transforms abruptly into spiral arms.
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On the theory of barred and magellanic spiral galaxies
Bulletin astronomique, 1968We investigate the properties of stellar orbits in barred spiral galaxies to explain 1) the ring structures encircling the bars of SB(r) galaxies and 2) the unusual internal velocity field in the Magellanic barred Spiral NGC4027.
Freeman, Ken C., Harrington, R.
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Dynamical modelling of the remarkable four-armed barred spiral galaxy ESO 566−24
, 2003ESO 566-24 is an extraordinary barred galaxy, which has four regularly spaced spiral arms in blue light images. This type of four-armed spiral structure, which is rare among the spiral population, is clearly seen also in near-infrared images, and thus is
P. Rautiainen +4 more
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A new model for barred spiral galaxies
Astrophysics and Space Science, 1983Computer simulations are used to demonstrate that normal spiral galaxies with symmetrically warped arms can appear to have bar and bar-within-ring structures when viewed from appropriate position angles.
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Multiple patterns in spiral and barred galaxies
Publications of the Astronomical Society of the Pacific, 1993Our ability to locate resonances of spiral patterns in galaxies is severely limited if spirals are short-lived and if many patterns co-exist in the same galaxy. Theoreticians are currently divided on the basic question of whether spiral patterns are long-lived, but I argue that multiple, short-lived pattersn are to be expected. Bars, on the other hadn,
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Cosmological simulations of galaxy formation
Nature Reviews Physics, 2020Mark Vogelsberger +2 more
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Cosmology and fundamental physics with the Euclid satellite
Living Reviews in Relativity, 2018Luca Amendola +2 more
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Cosmology and Fundamental Physics with the Euclid Satellite
Living Reviews in Relativity, 2013Luca Amendola +2 more
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