Results 11 to 20 of about 646 (172)
Barred spiral galaxies in modified gravity theories [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT When bars form within galaxy formation simulations in the standard cosmological context, dynamical friction with dark matter (DM) causes them to rotate rather slowly. However, almost all observed galactic bars are fast in terms of the ratio between corotation radius and bar length.
Mahmood Roshan +6 more
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Gas Streaming in Barred Spiral Galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1965 K. C. Freeman, L. Mestel
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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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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.
J. A. Sellwood, L. S. Sparke
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Structure and Evolution of Barred Spiral Galaxies, I [PDF]
Monthly Notices of the Royal Astronomical Society, 1966 K. C. Freeman
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Stellar populations in the center of barred spiral galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe show observations obtained with the integral field spectrometer OASIS for the centers of a sample of barred galaxies. The high spatial resolution of the instrument allows to distinguish spatially some structures within these regions as defined by stellar populations of different ages and metallicities.
M. Mollá +3 more
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The Frequency of Barred Spiral Galaxies in the Near-Infrared [PDF]
The Astronomical Journal, 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. We find 56% of our sample to be strongly barred at H, while another 16% is weakly barred. Only 27% of our sample is unbarred in the near-infrared.
Paul B. Eskridge +11 more
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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 ...
Preethi Nair, Roberto Abraham
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On wave dark matter in spiral and barred galaxies [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 We recover spiral and barred spiral patterns in disk galaxy simulations with a Wave Dark Matter (WDM) background (also known as Scalar Field Dark Matter (SFDM), Ultra-Light Axion (ULA) dark matter, and Bose-Einstein Condensate (BEC) dark matter). Here we show how the interaction between a baryonic disk and its Dark Matter Halo triggers the formation of
L. A. Martinez-Medina +2 more
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