INFRARED AND CCD PHOTOMETRIC STUDY OF SPIRAL GALAXIES.

摘要

Infrared J (1.2 (mu)m), H (1.6 (mu)m) and K (2.2 (mu)m) photometry is presented for a subsample of galaxies with morphological types of Sc and Sb of the sample types Sc and Sb of the sample by Rubin et al. and one edge-on spiral galaxy. After an overview of the science of infrared photometry we derive accurate photometric magnitudes via curves of growth which have been computed using a compiled catalogue of galaxies which have been observed in the infrared. The catalogue is presented in Appendix I.; We use our photometric data to derive mass to light ratio distribution and the colors for each galaxy.; Several correlations of photometric and dynamical quantities are examined and discussed as integral properties of the two morphological types. The main result of this analysis is that the mass to H-light ratio is independent of radius and of H-luminosity and is a good measure of the stellar component of the galaxy. Emphasis is placed on the Tully-Fisher, absolute magnitude vs. log (rotational velocity), relation and its application to derive distances of galaxies. We discuss the causes of discrepancies between various authors and compare the distance moduli found by various methods.; In addition Charged Coupled Device (CCD) photometry is presented for two Sb and two Sc spiral galaxies in three bands: B (.48 (mu)m), V (.55 (mu)m) and R (.67 (mu)m). We analyze these photometric data using 2 different methods from the Image Handling and Processing techniques. We use our resulting data to derive surface brightness distribution profiles and decompose the profiles to spheroidal and disk components. We also discuss the radial distribution of color in these galaxies.