Near-infrared surface photometry of barred spiral galaxies

1986 ◽  
Vol 98 ◽  
pp. 56 ◽  
Author(s):  
C. W. Baumgart ◽  
C. J. Peterson
Keyword(s):  
Near Infrared ◽  
Spiral Galaxies ◽  
Surface Photometry ◽  
Barred Spiral Galaxies

scholarly journals Bar Properties as a Function of Hubble Type

1996 ◽  
Vol 157 ◽  
pp. 23-29
Author(s):  
Debra Meloy Elmegreen
Keyword(s):  
Surface Brightness ◽  
Near Infrared ◽  
Spiral Galaxies ◽  
Infrared Light ◽  
Surface Photometry ◽  
Optical Surface ◽  
Barred Galaxies ◽  
Additional Information ◽  
Grand Design ◽  
Barred Spiral Galaxies

AbstractPrevious optical surface photometry of barred spiral galaxies revealed that there are two distinct types of bars: large bars tend to have a nearly constant surface brightness (”flat“ bar), while smaller bars tend to have a decreasing surface brightness with a scale length similar to the disk (”exponential“ bar). Statistically, flat bars tend to occur in early Hubble types and exponential bars in later types. Studies of resonances in spirals indicate that flat bars end inside corotation, while exponential bars end between the inner Lindblad and 4:1 resonances. Near-infrared (JHK) surface photometry of bars is presented in order to compare the stellar distributions and bar potentials in flat and exponential barred galaxies. The presence of isophotal twists in some galaxies provides additional information on resonances. The grand design and fiocculent optical structures in the two types of barred galaxies will be compared and contrasted with their near-infrared light distributions.

scholarly journals Circumnuclear regions in barred spiral galaxies — I. Near-infrared imaging

2000 ◽  
Vol 317 (2) ◽  
pp. 234-248 ◽  
Author(s):  
D. Pérez-Ramírez ◽  
J. H. Knapen ◽  
R. F. Peletier ◽  
S. Laine ◽  
R. Doyon ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Imaging ◽  
Spiral Galaxies ◽  
Near Infrared Imaging ◽  
Barred Spiral Galaxies

scholarly journals Dynamics of Ringed Barred Spiral Galaxies. I. Surface Photometry and Kinematics of NGC 1433 and NGC 6300

2001 ◽  
Vol 121 (1) ◽  
pp. 225-243 ◽  
Author(s):  
R. Buta ◽  
Stuart D. Ryder ◽  
Gregory J. Madsen ◽  
Karen Wesson ◽  
D. A. Crocker ◽  
...  
Keyword(s):  
Spiral Galaxies ◽  
Surface Photometry ◽  
Barred Spiral Galaxies

STRUCTURES OUT OF CHAOS IN BARRED-SPIRAL GALAXIES

2012 ◽  
Vol 22 (09) ◽  
pp. 1230029 ◽  
Author(s):  
P. A. PATSIS
Keyword(s):  
Near Infrared ◽  
Spiral Galaxies ◽  
Morphological Features ◽  
Infrared Images ◽  
Chaotic Motions ◽  
Spiral Arms ◽  
Gravitational Fields ◽  
Pattern Speed ◽  
Barred Spiral Galaxies ◽  
Kinematical Data

We review the dynamical mechanisms we have found to support the morphological features in barred-spiral galaxies based on chaotic motions of stars in their gravitational fields. These morphological features are the spiral arms, that emerge out of the ends of the bar, but also shape the bar itself. The potentials used have been estimated directly from near-infrared images of barred-spiral galaxies. In this paper, we present the results from the study of the dynamics of the potentials of the galaxies NGC 4314, NGC 1300 and NGC 3359. The main unknown parameter in our models is the pattern speed of the system Ωp. By varying Ωp, we have investigated several cases trying to match the results of our modeling with available photometrical and kinematical data. We found realistic models with stars on spirals in chaotic motion, while their bars are built by stars usually on regular orbits. However, we also encountered cases, where a major part of trajectories of the stars even in the bar is chaotic as well. Finally, we examined the gas dynamics of barred-spiral systems, and found that the presence of gas reinforces the intensity of the "chaotic" spiral arms.

Near-Infrared Observations of Isophotal Twists in Barred Spiral Galaxies

1996 ◽  
Vol 111 ◽  
pp. 1880 ◽  
Author(s):  
Debra Meloy Elmegreen ◽  
Bruce G. Elmegreen ◽  
Frederick R. Chromey ◽  
David Alan Hasselbacher ◽  
Bradley A. Bissell
Keyword(s):  
Near Infrared ◽  
Spiral Galaxies ◽  
Infrared Observations ◽  
Barred Spiral Galaxies
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