Results 11 to 20 of about 455,148 (185)
Effect of bars on evolution of SDSS spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We explore the significance of bars in triggering central star formation (SF) and active galactic nucleus (AGN) activity for spiral galaxy evolution using a volume-limited sample with 0.020 < z < 0.055, Mr < −19.5, and σ > 70 km s−1 selected from Sloan Digital Sky Survey Data Release 7.
Minbae Kim +2 more
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Invariant manifolds in barred galaxy simulations
Astronomy & AstrophysicsContext. Several theories have attempted to explain the formation, evolution, and overall nature of spiral arms in barred galaxies. However, although some are supported by theoretical arguments or numerical simulations, none has been fully conclusive ...
Soler-Terricabras T. +2 more
doaj +5 more sources
Star Formation Activity of Barred Spiral Galaxies [PDF]
The Astrophysical Journal, 2017 Abstract We study the star formation activity of nearby galaxies with bars using a sample of late-type galaxies at and from the Sloan Digital Sky Survey.
Eunbin Kim +6 more
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Asymptotic orbits in barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We study the formation of the spiral structure of barred spiral galaxies, using an $N$-body model. The evolution of this $N$-body model in the adiabatic approximation maintains a strong spiral pattern for more than 10 bar rotations. We find that this longevity of the spiral arms is mainly due to the phenomenon of stickiness of chaotic orbits close to ...
M. Harsoula +2 more
openaire +3 more sources
The local galaxy density and the bars of spiral galaxies
The Astrophysical Journal, 1993 23 pages, LaTeX, SISSA Ref.
GIURICIN G +3 more
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The Frequency of Barred Spiral Galaxies in the Near-IR [PDF]
, 2000 We have determined the fraction of barred galaxies in the H-band for a statistically well-defined sample of 186 spirals drawn from the Ohio State University Bright Spiral Galaxy survey.
Tiede, Glenn P. +11 more
core +1 more source
Galaxy Zoo:dust in spiral galaxies [PDF]
, 2010 We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project.
Masters, Karen L. +33 more
core +1 more source
TESTING THEORIES IN BARRED-SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2011 According to one version of the recently proposed "manifold" theory that explains the origin of spirals and rings in relation to chaotic orbits, galaxies with stronger bars should have a higher spiral arms pitch angle when compared to galaxies with weaker bars.
openaire +2 more sources
Molecular Bars in Spiral Galaxies [PDF]
International Astronomical Union Colloquium, 1996 Images of molecular gas in spiral galaxies show two types of bar structure: large-scale bars, which are correlated with the presence of stellar bars, and generally follow the spiral structure, and nuclear “bars” of a few hundred parsecs in size, which show no direct correlation with the presence of a stellar bar.
openaire +1 more source
The Distribution of Bar and Spiral Arm Strengths in Disk Galaxies [PDF]
The Astronomical Journal, 2005 The distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored. We have applied the bar/spiral separation method of Buta, Block, and Knapen to derive the distribution of maximum relative gravitational bar torques, Q_b, for 147 spiral galaxies in the statistically well-defined ...
Buta, R. +3 more
openaire +2 more sources