Results 201 to 210 of about 8,619 (233)

K-Band observations of barred spiral galaxies.

open access: yesThe Astronomical Journal, 1997
Michael W. Regan, Debra Meloy Elmegreen
openaire   +1 more source

Slow bars in spiral galaxies

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
openaire   +1 more source

The Secrets of Barred Spiral Galaxies

Global Research Journal, 2022
Black holes start their lives as big dead stars in the depth of the universe. As they move towards the outer universe they gather cosmic dust, asteroids, planets, eventually they get bigger. The gravitational force increases and continues this process for billions of years. When an asteroid enters the gravitational field of an ever-growing dead star, it
openaire   +1 more source

The barred spiral structure of galaxies

Chinese Astronomy and Astrophysics, 1984
Abstract 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.
null Chen Zhen-cheng   +2 more
openaire   +1 more source

STRUCTURES OUT OF CHAOS IN BARRED-SPIRAL GALAXIES

International Journal of Bifurcation and Chaos, 2012
We review the dynamical mechanisms we have found to support the morphological features in barred-spiral galaxies based on chaotic motions of stars in their gravitational fields. These morphological features are the spiral arms, that emerge out of the ends of the bar, but also shape the bar itself.
openaire   +1 more source

Barred Spirals and Formation of Spiral Arms by Galaxies

Nature, 1965
SO 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.
openaire   +1 more source

A new model for barred spiral galaxies

Astrophysics and Space Science, 1983
Computer 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.
openaire   +1 more source

A repeating fast radio burst source localized to a nearby spiral galaxy

Nature, 2020
Benito Marcote   +2 more
exaly  

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