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Structural Properties of early type Galaxies with Ionised Gas

Author Affiliations

  • 1 Department of Physics, University of Calicut, Malappuram, Kerala, INDIA

Res. J. Physical Sci., Volume 1, Issue (5), Pages 7-11, June,4 (2013)


Morphology is a fundamental property of galaxies. We discuss the morphological analysis of early type galaxies in the near infra-red K band observations from Two Micron All Sky Survey (2MASS). The sample covers nearby (z < ~ 5500 km/s) ellipticals and lenticulars from low density environments. For each image, structural parameters were extracted assuming Sérsic bulge and an exponential disk for the surface brightness profile of every galaxy, using the 2D galaxy fitting algorithm, GALFIT. The sample shows very significant and tight correlation between the bulge and disk scale radii (linear correlation coefficient = 0.934, Significance > 99.99%), suggesting a strong interplay between the bulge and disk components in early type galaxies with ionised gas.


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