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University Microfilms International 300 N INFORMATION TO USERS This was produced from a copy of a document sent to us for microfilming. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the material submitted. The following explanation of techniques is provided to help you understand markings or notations which may appear on this reproduction. 1.The sign or “target” for pages apparently lacking from the document photographed is “Missing Page(s)”. If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages. This may have necessitated cutting through an image and duplicating adjacent pages to assure you of complete continuity. 2. When an image on the film is obliterated with a round black mark it is an indication that the film inspector noticed either blurred copy because of movement during exposure, or duplicate copy. 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ANN ARBOR, Ml 48106 18 BEDFORD ROW, LONDON WC1 R 4EJ, ENGLAND 8100217 P a l m e r , L e o n G e o r g e A SEARCH FOR CARBON AND M-TYPE STARS IN EIGHT GLOBULAR CLUSTERS The Ohio State University Ph.D. 1980 University Microfilms Internationa! 300 N. Zeeb Road, Ann Arbor, MI 48106 PLEASE NOTE: In all cases this material has been filmed in the best possible way from the available copy. Problems encountered with this document have been identified here with a check mark . 1. Glossy photographs __________ 2. Colored illu stratio n s __________ 3. Photographs with dark background ____ '4. Illustrations are poor copy __________ 5. °rint shows through as there is text on both sides of page ___________ 6. Indistinct, broken or small print on several pages __________ throughout 7. Tightly bound copy with print lost in spine ________ _ 8. Computer printout pages with indistinct print t^--" 9. Page(s) ______ lacking when material received, and not available from school or author _________ 10. Page(s) _________ seem to be missing in numbering only as text follows _________ 11. Poor carbon copy __________ 12. Not original copy, several pages with blurred type ______ 13. Appendix pages are poor co p y _________ _ 14. Original copy with light type __________ 15. Curling and wrinkled pages __________ 16. Other University Microfilms Intemarional 300 \ 3 = E= »u. ANN A S30P VI1 •IS ’ 06 '3131 761-4700 A SEARCH FOR CARBON AND M-TYPE STARS IN EIGHT GLOBULAR CLUSTERS DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of the Ohio State University By LEON G. PALMER, B.A., M.S. ***** The Ohio State University 1980 Reading Comnittee: Approved By Dr. Robert F. Wing Dr. Eugene R. Capriotti Dr. William M. Protheroe Adviser Department of Astronomy ACKNOWLEDGEMENTS I would like to express my deepest gratitude to my adviser, Dr. Robert F. Wing, for his advice, confident guidance, and especially for allowing me to tap his seemingly unbounded store of astronomical knowledge. I would also like to thank Dr. Paul Byard for his help in putting together the image-tube camera and in the sometimes occult art of keeping it functioning. I also deeply appreciate the intellectual stimulus, knowledge and camaraderie I have have received from the faculty and students in the astronomy department. I feel I am finishing an exciting period, which was full of new ideas, new thoughts and new fro n tie rs. I must also acknowledge the people at Logicon, its heart and soul, who helped me in ways too many to mention. Without th eir support during these last two years, finishing this dissertation would have been immeasureably more difficult. Lastly, I save my most loving thanks for my wife, Linda, who kept me sane, who gave me her unflagging moral support, who believed in me, and I thank her most for her love. Thank you again, my Linda, for spending those long nights working with me, for the weekends spent slaving over typewriters, computers and columnar pads. I owe you so much because you have given me so much. September 14, 1950. Born - Lindsay, California 1972........................................ B.A., Astronomy, University of California at Los Angeles 1974 ....................................... M.S., Astronomy, The Ohio State University, Columbus, Ohio. TABLE OF CONTENTS Page ACKNOWLEDGEMENTS.................................................................................................................. ii VITA..........................................................................................................................................iii LIST OF TABLES........................................................................................................................v LIST OF FIGURES...................................................................................................................vii Section 1. INTRODUCTION.............................................................................................................1 2. THE SURVEY PHOTOMETRIC SYSTEM ................................................................... 7 3. CLUSTER PHOTOMETRY............................................................................................. 34 4. ANALYSIS..................................................................................................................147 5. SUMMARY..................................................................................................................190 LIST OF REFERENCES...........................................................................................................193 LIST OF TABLES Table Page 1. Characteristics of the Filters of the Eight-Color System. .11 2. Comparisons of Survey-System and Eight-Color F ilters ....................16 3. Measured Characteristics of Survey F ilters .........................................21 4. Category 1, 2, and 3 Stars Used to Define the Response and Sensitivity of the Survey-System F ilters ....................................24 5. M Spectral-Type Calibrations for the Survey System and the Eight-Color System ............................................................................................31 6. Metal Abundances for the Clusters Studied .........................................36 7. Survey-System Photographic Plate Log.......................................................44 8. 47 Tuc, Uncorrected Iris Readings ...........................................................54 9. OJCen, Uncorrected Iris Readings ..............................................................57 10. M5, Uncorrected Iris Readings ....................................................................61 11. M10, Uncorrected Iris Readings ................................................................... 64 12. M12, Uncorrected Iris Readings ....................................................................68 13. M92, Uncorrected Iris Readings ................................................................... 71 14. NGC 6397, Uncorrected Iris Readings .......................................................73 15. NGC 6752, Uncorrected Iris Readings .......................................................75 16. 47 Tuc, Corrected Iris Readings................................................................82 17. M5, Corrected Iris Readings ........................................................................85 18. M10, Corrected Iris Readings .......................................................................88 19. M12, Corrected Iris Readings ........................................................................92 v LIST OF TABLES (Continued) Page 20. M92, Corrected Iris Readings .......................................................................95 21. NGC 6397, Corrected Iris Readings ..........................................................97 22. NGC 6752, Corrected Iris Readings ...........................................................99 23. Photoelectric Survey-System Photometry of Globular Cluster S t a r s ....................................................................................................................105 24. Calibration Equations to Convert Iris Readings to Magnitudes ........................................................................................................... 113 25. 47 Tuc, Photographic Survey-System Magnitudes and Indices . 115 26. M5, Photographic Survey-System Magnitudes and Indices . 118 27. M12, Photographic Survey-System Magnitudes and Indices. 121 28. M92, Photographic Survey-System Magnitudes and Indices. 124 29. NGC 6397, Photographic Survey-System
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