Spiral galaxy - Wikipedia, the free encyclopedia
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A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” and, as such, forms part of the Hubb...
en.wikipedia.org/wiki/Spiral_galaxy
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a normal spiral galaxy ... HI gas in our Galaxy is distributed in spiral arms ... Slide # 30: A Barred Spiral (GRAPHICS)
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astro.gmu.edu/classes/a10695/notes/l19/l19.html
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Formation and Evolution Mechanisms of Barred Spiral Galaxies. 11. 2 The Mechanism of Bar Formation. I shall list six mechanisms that have been discussed ...
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www.springerlink.com/index/mm53772015333868.pdf
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The general structure of the steady-state gas flow in a strongly barred galaxy has been understood for many years. ... ``Nuclear Rings and Mass Inflow in Hydrodynamic Simulations of Barred Galaxies", by G. Piner & J.M. Stone, The Astrophysical Journal, 449, 508 (1995). ``Molecular Gas Kinematics in Barred Spiral Galaxies",
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www.astro.princeton.edu/~jstone/galaxies.html
www.astro.princeton.edu/~jstone/galaxies.html
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Our Milky Way, another massive barred spiral galaxy, has a central bar that probably formed somewhat early, like the bars in other large galaxies in the Hubble survey. "Understanding how bars formed in the most distant galaxies will eventually shed light on how it occurred here, in our own backyard," Sheth says...
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www.astronomy.com/asy/default.aspx?c=a&id=7245
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The second and currently fashionable scenario proposed to form peanut/boxy bulges is through the buckling and thickening of a bar in a strongly barred spiral galaxy.
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www.atnf.csiro.au/pasa/14_2/bureau/paper/node2.html
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Click icon to see a spiral galaxy of Messier's catalog ... Spiral galaxies, "normal" and barred, with conspicuous bulges (especially near their center) are classified "Sa" or "SBa", those which have prominent bulges and pronounced arms are clssified "Sb" or "SBb", and those which are dominated by the arms are "Sc" or "SBc".
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www.seds.org/messier/spir.html
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This color image from the Hubble Space Telescope shows a region in NGC 1365, a barred spiral galaxy located in a cluster of galaxies called Fornax. A barred spiral galaxy is characterized by a "bar" of stars, dust and gas across its center.
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www.seds.org/hst/96-21a.html
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A new Hubble space telescope image of a ... A new Hubble space telescope image of a "barred" spiral galaxy provides a crisp look at the reddish horizontal arm that bisects NGC 2903 -- a favorite spring observing target of astronomers.
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www.space.com/scienceastronomy/astronomy/hubble_bar_010...
www.space.com/scienceastronomy/astronomy/hubble_bar_010302.html
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