INTER-UNIVERSITY  CENTRE  FOR  ASTRONOMY  AND  ASTROPHYSICS
(An Autonomous Institution of the University Grants Commission)

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  SEMINAR

 

DR. ARUN KUMAR SINGH

Department of Physics, Pragati College, Raipur
 
INTRINSIC SHAPES OF ELLIPTICAL GALAXIES BY PHOTOMETRY ALONE
 
 

Determination of intrinsic shapes of the individual elliptical galaxies using photometry is an important problem because the number of galaxies with good photometry is many more than those with good kinematics. We find that the variation in shape can be estimated, using photometry alone. We determine the intrinsic shapes of the light distribution of elliptical galaxies combining the profiles of photometric data from the literature with triaxial models. We use ensembles of models so that the shape estimates are largely model independent. We use a flat prior and then modified prior as obtained from the shape estimates of a large sample of elliptical galaxies to determine the intrinsic shapes of the elliptical galaxies.

 
IUCAA Lecture Hall, Bhaskara 3
May 31, 2013, 16:00 hrs.