We study the galactic spiral arm pitch angle dependence with wavelength as predicted by
the density wave theory. A sample of 10 barred and unbarred spiral galaxies with two …

In this study, we have found a new relation between the absolute magnitudes of bulges and"
pitch angles"(P)(Mbulge-P). Pitch angles (P) were estimated for 40 images of galaxies from" …

This work aims to study the difference between bulge dynamical masses and bulge stellar
masses for Spitzer/IRAC 3.6 μm images of 41spiral galaxies. The ratio between the stellar …

In this work, we have studied new correlations between velocity dispersion of the bulge and
bulge luminosity, using 40 images of spiral galaxies. This paper is depend on two …

In this wor, We compared a new value of supermassive blac hole masses (SMBH) in
Andromeda galaxy has been estimated using different methods (first, direct methods eg gas …

Multi-component modelling of galaxies is a valuable tool in the effort to quantitatively
understand galaxy evolution, yet the use of the technique is plagued by issues of …

A sample of 40 Spitzer/IRAS (3.6 µm) spiralgalaxies were selected. This sample consisted of
ranging of Hubble types from Sa to Sc to discovernew correlations. The total mass (Mtotal) of …