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Science-Technology

Published on August 29, 2007

Author: GenX

Source: authorstream.com

Identifying and Classifying the Galaxies of the High Redshift Cluster 2192Patricia Mutunga (with Fana Mulu) Advisors: Eric Wilcots Marc Verheijen:  Identifying and Classifying the Galaxies of the High Redshift Cluster 2192 Patricia Mutunga (with Fana Mulu) Advisors: Eric Wilcots Marc Verheijen Outline of talk:  Outline of talk Introduction Motivation The project Conclusion Acknowledgement Motivation:  Motivation Eric Wilcots - NSBP-students conference Marc and Eric - mini lectures Questions :How do galaxies form? Do clusters form from field galaxies? Have they evolved significantly since their formation? Is their morphological type an indication of their age? Introduction:  Introduction This project entails the search for, and study of, galaxies in the rich cluster of galaxies Abell 2192 at very large distances ( i.e. at High Redshift). Slide5:  Abell 2192 Slide6:  FLOW CHART FOR DATA PROCESSING SExtractor Separate stars andamp; galaxies GIPSY/copy CCD mosaic image of Abell 2192 221 'postage stamp' images Basic sample of 221 galaxies Remove stars andamp; other galaxies GIPSY/blot GIPSY/ellfit The Project:  The Project CCD mosaic image of Abell 2192 - courtesy of Marc Executed SExtractor To separate the stars and galaxies Basic sample of 221 galaxies copy feature in GIPSY to make 'postage stamp' images Blot feature in GIPSY to remove tars and other galaxies GIPSY and ellfit fitted in ellipses onto the galaxies to get geometric parameters GIPSY and Ellint to get photometric parameters External knowledge-atlases and text books: morphologies All the steps led to The Master Table! GIPSY:  GIPSY Ellint:  Ellint Examples:  Examples LP in R band LP in B band Geometric Parameters and Photometric parameters:  Geometric Parameters and Photometric parameters • GIPSY and ellfit fitted in ellipses onto the galaxies to get geometric parameters • GIPSY and Ellint to get photometric parameters • External knowledge-atlases and text books: morphologies • All the steps led to The Master Table! Luminosity Profiles:  Luminosity Profiles Luminosity Profiles:  Luminosity Profiles Magnitude and Colour graph:  Magnitude and Colour graph Radio detection:  Radio detection Conclusions:  Conclusions Our objective was reached. I learned a lot! Acknowledgements:  Acknowledgements Thank God Thank Eric and Marc Fana too! All the REU students! Slide18:  copy feature in GIPSY to make 'postage stamp' images Blot feature in GIPSY to remove tars and other galaxies GIPSY and ellfit fitted in ellipses onto the galaxies to get geometric parameters GIPSY and Ellint to get photometric parameters External knowledge-atlases and text books: morphologies All the steps led to The Master Table! Slide19:  Slide20: 

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