1. Identifying and Classifying the Galaxies of the High Redshift Cluster Patricia Mutunga (with Fana Mulu) Advisors: Eric Wilcots Marc Verheijen

2. Introduction Motivation The project Conclusion Acknowledgement
Outline of talk
Introduction
Motivation
The project
Conclusion
Acknowledgement

3. 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?

4. 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).

5. Abell 2192

6. Photometric parameters
CCD mosaic
image of
Abell 2192
FLOW CHART FOR DATA PROCESSING
Geometric parameters
Master Table!
Photometric parameters
Morphologies
GIPSY/ellint
External knowledge
SExtractor
Separate stars & galaxies
Basic sample of
221 galaxies
GIPSY/ellfit
GIPSY/copy
221 “postage
stamp” images
CCD Image of Abell 2192 courtesy of ( Marc Verherjen)
GIPSY/blot
Remove stars &
other galaxies

7. 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!

8. GIPSY

9. Ellint

10. Examples
LP in B band
LP in R band

11. 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!

12. Luminosity Profiles

13. Luminosity Profiles

14. Magnitude and Colour graph

15. Radio detection

16. Conclusions
Our objective was reached.
I learned a lot!

17. Acknowledgements Thank God Thank Eric and Marc Fana too!
All the REU students!

18. 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!