The local velocity field and the calibration of the luminosity classification of spiral galaxies

1982 ◽  
Vol 259 ◽  
pp. 530 ◽  
Author(s):  
R. C., Jr. Kennicutt
Keyword(s):  
Velocity Field ◽  
Spiral Galaxies ◽  
Local Velocity

Spiral Galaxies, Elliptical Galaxies and the Large-Scale Velocity Field Within 3500 Km/s of the Local Group

1988 ◽  
pp. 177-180 ◽  
Author(s):  
David Burstein ◽  
Roger L. Davies ◽  
Alan Dressler ◽  
S. M. Faber ◽  
Donald Lynden-Bell ◽  
...  
Keyword(s):  
Velocity Field ◽  
Large Scale ◽  
Local Group ◽  
Spiral Galaxies ◽  
Elliptical Galaxies

scholarly journals A Method To Determine the Intrinsic Axial Ratios of Individual Triaxial Galaxies

1987 ◽  
Vol 127 ◽  
pp. 401-402
Author(s):  
Ortwin E. Gerhard ◽  
Mario Vietri
Keyword(s):  
Velocity Field ◽  
Spiral Galaxies ◽  
Surface Photometry ◽  
Gas Velocity

We present a method, partly geometrical and partly dynamical, to determine the intrinsic axial ratios of a triaxial galaxy. The method can be applied to bulges of spiral galaxies and to ellipticals containing sufficiently extended and kinematically regular gas disks. Required observational inputs are multi-colour surface photometry and the gas velocity field.

Bulk Motion of Galaxies and Hubble Flow Anisotropy on a Scale of 100 Mpc

2005 ◽  
Vol 201 ◽  
pp. 501-502
Author(s):  
S. L. Parnovsky ◽  
V. E. Karachentseva ◽  
Yu. N. Kudrya ◽  
I. D. Karachentsev
Keyword(s):  
Velocity Field ◽  
Large Scale ◽  
Spiral Galaxies ◽  
Dipole Component ◽  
Bulk Motion ◽  
Flow Anisotropy ◽  
Strong Dipole ◽  
Hubble Flow

We study a large-scale bulk motion of thin edge-on spiral galaxies from the RFGC catalogue using a multipole decomposition of velocity field. The quadrupole and octupole components are statistically significant. The first one corresponds to the Hubble flow anisotropy, the second one leads to decrease of modulus of dipole component due to the strong dipole-octupole interaction.

scholarly journals How well do we know the rotation curve of our Galaxy?

1985 ◽  
Vol 106 ◽  
pp. 107-108
Author(s):  
Paris Pişmiş
Keyword(s):  
Velocity Field ◽  
Rotation Curve ◽  
Spiral Galaxies ◽  
Spiral Structure ◽  
Smooth Curve ◽  
Velocity Fields ◽  
Rotation Curves ◽  
The Past ◽  
Different Populations ◽  
The Waves

The existence of variations from a smooth curve, in the form of waves, in the rotation curves of galaxies was pointed out earlier, and an interpretation was proposed based on the argument that the waves were the manifestation of the coexistence of different populations in a galaxy (see for example PişLmiş 1965, 1974). Observations in the past few years have shown that “undulations” in the rotation curve of spiral galaxies are rather common phenomena; maxima and minima occur roughly at arm and interarm regions, respectively. The velocity fields of the majority of the 23 galaxies compiled by Bosma (1978) exhibit well-defined waves. In particular the velocity field in the 21-cm HI line of M81 by Visser shows clearly the correlation of the waves with the spiral structure.

The Local Velocity Field

2008 ◽  
Author(s):  
Karen Masters ◽  
Robert Minchin ◽  
Emmanuel Momjian
Keyword(s):  
Velocity Field ◽  
Local Velocity
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