Chiral Property of Spiral and Barred Spiral Galaxies in the Local Supercluster

2007 ◽  
Vol 307 (4) ◽  
pp. 369-383 ◽  
Author(s):  
B. Aryal ◽  
S. R. Acharya ◽  
W. Saurer
Keyword(s):  
Spiral Galaxies ◽  
Chiral Property ◽  
Local Supercluster ◽  
Barred Spiral Galaxies

scholarly journals Chiral Property of Field Galaxies Around the Local Supercluster

1970 ◽  
Vol 8 (8) ◽  
pp. 81-90
Author(s):  
Binil Aryal
Keyword(s):  
Spiral Galaxies ◽  
Position Angle ◽  
Chi Square ◽  
Hubble Sequence ◽  
Auto Correlation ◽  
Random Direction ◽  
Chiral Property ◽  
Scientific World ◽  
Local Supercluster ◽  
Good Agreement

We present an analysis of the winding sense of 1,621 field galaxies having radial velocity 3 000 km/s to 5,000 km/s. The arm patterns (S and Z-shaped, i.e., chiral property) of the spirals are visually studied. In order to classify the structural modes of spirals, we assume a random direction of the rotation of galaxies. Anisotropy in the chiral symmetry and the preferred alignment of galaxies is studied using chi-square, auto-correlation and the Fourier tests. We noticed a good agreement between the random alignment of the position angle (PA) distribution and the existence of chirality in both the leading and trailing modes. Chirality is found stronger for the late- type spirals (Sc, Scd, Sd and Sm) than that of the early types (Sa, Sab, Sb and Sbc). A significant dominance (17% & 8.5%) of trailing modes is noticed in the barred spirals. In addition, chirality of field galaxies is found to remain invariant under the global expansion. A random alignment is noticed in the PA-distribution of leading and trailing mode spirals. Key Words: Spiral galaxies; Hubble sequence; Chirality; Clusters: individual (Local Supercluster). DOI: 10.3126/sw.v8i8.3856 Scientific World Vol.8(8) 2010 pp.81-90

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

HI in the Barred Spiral Galaxies NGC 1365 and NGC 1097

1983 ◽  
pp. 233-234 ◽  
Author(s):  
J. M. van der Hulst ◽  
M. P. Ondrechen ◽  
J. H. van Gorkom ◽  
E. Hummel
Keyword(s):  
Spiral Galaxies ◽  
Barred Spiral Galaxies ◽  
Ngc 1365

scholarly journals Infrared Emission from Barred Spiral Galaxies

1996 ◽  
Vol 157 ◽  
pp. 54-62
Author(s):  
Tim G. Hawarden ◽  
J. H. Huang ◽  
Q. S. Gu
Keyword(s):  
Star Formation ◽  
Spiral Galaxies ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Infrared Emission ◽  
Stellar Radiation ◽  
The Galaxy ◽  
Barred Spiral Galaxies ◽  
Star Formation Regions ◽  
Ir Emission

AbstractAmongst relatively undisturbed spiral galaxies of type ≤ Sc barred morphology is unquestionably associated with powerful mid- and Far-IR emission. On the other hand, even amongst early type galaxies, those with LFIR/LB < 1/3 exhibit no association of high relative FIR luminosity with barred morphology, but some association of IR colors resembling those of star formation regions (SFRs). Amongst systems with LFIR/LB < 0.1 this ratio may be anti-correlated with barredness. It appears that enhanced IR emission from those galaxies whose star formation rate is currently elevated by the the bar translates them into the group with higher FIR-to-optical luminosity ratios. Depletion of extended nearnuclear gas and dust, once the bar has swept up the currently-available supplies, may reduce the fraction of the background stellar radiation field which can be converted to FIR radiation in the inner, most luminous parts of the galaxy. Thus, after the starburst has subsided, such galaxies may be less FIR-luminous than unbarred systems. Several uncertainties remain: it is still not clear whether barred morphology is a necessary condition for the generation of a starburst in an otherwise undisturbed galaxy, while evidence as to the effect of differing bar strengths is conflicting.

scholarly journals The Dark Matter Content of Barred Spiral Galaxies

2004 ◽  
Vol 220 ◽  
pp. 277-278
Author(s):  
Glen Petitpas ◽  
Mousumi Das ◽  
Peter Teuben ◽  
Stuart Vogel
Keyword(s):  
Dark Matter ◽  
Spiral Galaxies ◽  
Velocity Fields ◽  
Matter Content ◽  
Two Dimensional ◽  
Disk Model ◽  
Barred Galaxies ◽  
Preliminary Results ◽  
Nearby Galaxies ◽  
Barred Spiral Galaxies

Two-dimensional velocity fields have been used to determine the dark matter properties of a sample of barred galaxies taken from the BIMA Survey of Nearby Galaxies (SONG). Preliminary results indicate that the maximal disk model is not appropriate in several galaxies in our sample, but higher resolution results will be needed to confirm this.

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

Motions in Barred Spiral Galaxies. II the Rotation of NGC 7479.

1960 ◽  
Vol 132 ◽  
pp. 654 ◽  
Author(s):  
E. Margaret Burbidge ◽  
G. R. Burbidge ◽  
K. H. Prendergast
Keyword(s):  
Spiral Galaxies ◽  
Barred Spiral Galaxies
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