Results 51 to 60 of about 25,712 (75)
A New Statistical Analysis of the Morphology of Spiral Galaxies [PDF]
arXivMorphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure. With the release of a vast number of clear spiral galaxy images from the Sloan Digital Sky Survey, we conducted a morphological ...
arxiv
Galactic Spiral Arms: Structure and Dynamics Given by an Equation of Motion [PDF]
arXiv, 2013 Using an equation of motion for a self-gravitating filament, we show how galactic spiral arms might be created and sustained. We find that the combination of differential rotation of the galactic disk and the self-gravity of the arm (as given by the equation) leads to a rotating spiral structure.
arxiv
Spiral Arms as Envelopes [PDF]
Monthly Notices of the Royal Astronomical Society, 1932 openaire +2 more sources
Predominance of two-armed spirals
The Astrophysical Journal, 1976 A physical process accounts for the origin and widespread occurrence of two-armed spiral patterns with a high degree of symmetry extending from the nucleus to the outermost part of a galaxy. Self-gravitating systems, starting from a wide variety of initial conditions, settle down into twofold symmetries through a sequence of forms that were identified ...
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On the Development of Spiral Arms in a Galaxy
The Astronomical Journal, 1963 openaire +3 more sources
The Shape of Spiral Arms [PDF]
Astrophysics and Space Science, 1986 The response by a gaseous disc to perturbations is investigated. Spectral analysis of the resulting pattern indicates that information about the nature of the perturber is maintained only if the perturbation is strong.
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The Astrophysical Journal, 1996
We describe a high-resolution, high-sensitivity CO(1-0) survey of a large fraction of the south-west star-forming "ring" 20 kpc in diameter in M31 made with the 14 m FCRAO telescope and its QUARRY receiver array. At the 45'' angular resolution of the telescope, the ring is resolved into giant complexes of molecular gas with typical sizes of a few ...
E. Koper +6 more
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We describe a high-resolution, high-sensitivity CO(1-0) survey of a large fraction of the south-west star-forming "ring" 20 kpc in diameter in M31 made with the 14 m FCRAO telescope and its QUARRY receiver array. At the 45'' angular resolution of the telescope, the ring is resolved into giant complexes of molecular gas with typical sizes of a few ...
E. Koper +6 more
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The Fine Structure of the Spiral‐arms
Astronomische Nachrichten, 1976AbstractAn explanation for filaments inclined to the galactic plane observed in the next‐inner spiral‐arm is sought in terms of self‐consistent z‐oscillations. These filaments or „shingles”︁ are observed to be ˜ 1.4 kpc long, 70 pc thick and inclined to the plane by ˜ 12°.
Th. Schmidt-Kaler, F. House
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