Results 11 to 20 of about 7,888 (222)
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 ...
Constantinos Kalapotharakos +2 more
openaire +5 more sources
AGN spiral galaxies in groups: effects of bars [PDF]
Astronomy & Astrophysics, 2014 10 pages, 10 figures.
Sol Alonso +6 more
core +9 more sources
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 ...
Heikki Salo +3 more
openaire +5 more sources
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
openalex +8 more sources
Gas Streaming in Barred Spiral Galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1965 K. C. Freeman, L. Mestel
openalex +3 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
openalex +6 more sources
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
openalex +4 more sources
Structure and Evolution of Barred Spiral Galaxies, I [PDF]
Monthly Notices of the Royal Astronomical Society, 1966 K. C. Freeman
openalex +5 more sources
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
openalex +5 more sources
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
openalex +7 more sources