Results 111 to 120 of about 184,560 (234)
Multicolor Photometry of Barred Spiral Galaxies [PDF]
International Astronomical Union Colloquium, 1996 B – V and R – I color maps (from CCD imagery obtained at Cerro Tololo Inter-American Observatory) of six barred spiral galaxies have been used (Horst 1992) to investigate stellar populations within the bars and nuclei. Two-color diagrams show that the distribution of pixel colors largely parallels the expected locus for normal unreddened stars. If the “
William D. Horst, Charles J. Peterson
openaire +2 more sources
How Nested Bars Enhance, Modulate, and Are Destroyed by Gas Inflows
The Astrophysical Journal, 2023 Gas flows in the presence of two independently rotating nested bars remain not fully understood but are likely to play an important role in fueling the central black hole.
Zhi Li +9 more
doaj +1 more source
The population of barred galaxies in the local universe I. Detection and characterisation of bars [PDF]
, 2009 (Abridge) Bars are very common in the centre of the disc galaxies, and they drive the evolution of their structure. A volume-limited sample of 2106 disc galaxies extracted from the Sloan Digital Sky Survey Data Release 5 was studied to derive the bar fraction, length, and strength as a function of the morphology, size, local galaxy density, light ...
arxiv +1 more source
Manifold spirals in barred galaxies with multiple pattern speeds [PDF]
A&A 636, A44 (2020), 2019 In the manifold theory of spiral structure in barred galaxies, the usual assumption is that the spirals rotate with the same pattern speed as the bar. Here we generalize the manifold theory under the assumption that the spirals rotate with different pattern speed than the bar.
arxiv +1 more source
The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies
The Astrophysical JournalAs galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz +4 more
doaj +1 more source
Companions of Bright Barred Shapley Ames Galaxies
, 2003 Companion galaxy environment for a subset of 78 bright and nearby barred galaxies from the Shapley Ames Catalog is presented. Among spiral barred galaxies there are Seyfert galaxies, galaxies with circumnuclear structures, galaxies not associated with ...
Athanassoula E. +12 more
core +1 more source
Molecular Gas Kinematics in Barred Spiral Galaxies [PDF]
The Astrophysical Journal, 1999 To quantify the effect that bar driven mass inflow can have on the evolution of a galaxy requires an understanding of the dynamics of the inflowing gas. In this paper we study the kinematics of the dense molecular gas in a set of seven barred spiral galaxies to determine which dynamical effects dominate.
Kartik Sheth +2 more
openaire +4 more sources
The Astrophysical Journal, 2023 The secular evolution of disk galaxies is largely driven by resonances between the orbits of “particles” (stars or dark matter) and the rotation of non-axisymmetric features (spiral arms or a bar).
Chris Hamilton +3 more
doaj +1 more source
Chemical enrichment in isolated barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 16 pages, 11 figures, accepted for publication in ...
Hugo Martel +4 more
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