An Analysis of 64 Northern Spiral Galaxies in Framework of Power-Law Hypothesis
Year: 2012
Type: preprint
Abstract: One of the largest Rotation Curve (RC) databases of spiral galaxies currently available is provided by the kinematic and photometric data of Stephane Courteau. These RCs were originally obtained for cosmic flow studies. The final collection of RCs consists of 304 galaxies. This collection includes 64 RCs of morphological type Sb galaxies which are the subject of the present analysis. In the context of our study of these 64 northern spirals, we show that the velocity of the test particle in galactic region can be described by generalized power law. It is found that RCs impose an extremely strong correlation between the free parameters of the power law, and this correlation accounts for virtually all the variation in the pivotal diagram. The analysis brings out clearly that RCs can be partitioned into well-defined discrete subclasses. Our analysis of data yields results similar to those obtained by D F Roscoe for southern sky galaxies. This clearly indicates that galaxies can be classified into discrete subclasses according to their dynamics in context of power law.
Source: SSRN Electronic Journal
Authors: M. Thakrey, N. Thakre, G. K. Upadhyaya
Institution: Vikram University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2302017586