Results 11 to 20 of about 8,504 (230)
Formation of Nuclear Spirals in Barred Galaxies [PDF]
The Astrophysical Journal, 2005 38 pages, 10 figures, accepted for publication in ...
H. B. Ann +3 more
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Gaseous Vortices in Barred Spiral Galaxies [PDF]
The Astrophysical Journal, 2000 Simulations of the gas flow in a variety of two-dimensional barred spiral galaxies have shown that vortices in the gas appear, when viewed from above, in the corotation frame of the bar. These low-density vortices generally appear at or near the L4 and L5 Lagrangian points.
Martin N. England +2 more
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Formation of Major Types of Galaxies Based on the Energy Circulation Theory
Reports in Advances of Physical Sciences, 2022 The standard cosmology can answer almost nothing about how the structure of a galaxy is formed. It expects a supermassive black hole at the center and dark matter in the halo to explain the circulation of stars and its velocity.
Shigeto Nagao
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The profiles of bars in spiral galaxies
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We present an analysis of major-axis surface-brightness profiles of bars in a volume-limited sample of 182 barred spiral galaxies, using Spitzer 3.6 $\mu$m images. Unlike most previous studies, we use the entire bar profile, and we classify profiles into four categories.
Peter Erwin +2 more
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ON THE FRACTION OF BARRED SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2010 We investigate the stellar masses of strongly barred spiral galaxies. Our analysis is based on a sample of ~14000 visually-classified nearby galaxies given in Nair & Abraham 2010(a). The fraction of barred spiral galaxies is found to be a strong function of stellar mass and star formation history, with a minimum near the characteristic mass at ...
Nair, Preethi B., Abraham, Roberto G.
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First Look at z > 1 Bars in the Rest-frame Near-infrared with JWST Early CEERS Imaging
The Astrophysical Journal Letters, 2023 Stellar bars are key drivers of secular evolution in galaxies and can be effectively studied using rest-frame near-infrared (NIR) images, which trace the underlying stellar mass and are less impacted by dust and star formation than rest-frame UV or ...
Yuchen Guo +47 more
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Dynamical rules for barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1985 Des integrations numeriques des orbites-2D demontrent que la famille principale d'orbites periodiques dans les forts potentiels barres est la famille parallele prograde. Toutes les autres familles ont des distributions de la densite des orbites qui sont incompatibles avec le potentiel impose.
TEUBEN, PJ, SANDERS, RH
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Exploring the Magnetic Field Geometry in NGC 891 with SOFIA/HAWC+
The Astronomical Journal, 2023 Stratospheric Observatory For Infrared Astronomy/High-resolution Airborne Wideband Camera-plus 154 μ m Far-Infrared polarimetry observations of the well-studied edge-on galaxy NGC 891 are analyzed and compared to simple disk models with ordered (planar ...
Jin-Ah Kim +2 more
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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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Pattern speeds in barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1988 Des simulations a N corps montrent comment la barre des galaxies SB tourne, se separe de la structure spirale, la rattrappe et se connecte de nouveau au bras spiraux. Cela provient de vitesses de rotation differentes pour la barre et les bras spiraux.
SELLWOOD, JA, SPARKE, LS
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