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The nature of M33’s AGB stars Rowe, Jason F.
Abstract
Using the CFH12k imager on the Canada-France-Hawaii Telescope, photometry of 1.3 million stars is used to investigate stellar populations in the metal poor ([Fe/H]=-0.6) late type spiral galaxy M33. M33 has a distance modulus of D=24.64 and AGB stars are highly luminous, allowing resolved population studies with 4 metre class telescopes. AGB stars are identified and classified in C (carbon) and M-type stars. Examining star counts and colour-magnitude selected stellar populations, the galactic structure of M33 is examined. Further, we search for evidence of galactic interactions as seen in other nearby galaxies, such as M31. We use the ratio of C-stars to M-stars to investigate the metallicity distribution throughout the disk. The C/M-star ratio is found to increase and flatten with galactocentric distance in agreement with viscous disk formation models. The C-star Luminosity function is found to be similar to the SMC and M31 making C-stars possible distance indicators.
Item Metadata
Title |
The nature of M33’s AGB stars
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2003
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Description |
Using the CFH12k imager on the Canada-France-Hawaii Telescope, photometry of 1.3
million stars is used to investigate stellar populations in the metal poor ([Fe/H]=-0.6)
late type spiral galaxy M33. M33 has a distance modulus of D=24.64 and AGB stars
are highly luminous, allowing resolved population studies with 4 metre class telescopes. AGB stars are identified and classified in C (carbon) and M-type stars.
Examining star counts and colour-magnitude selected stellar populations, the galactic
structure of M33 is examined. Further, we search for evidence of galactic interactions
as seen in other nearby galaxies, such as M31. We use the ratio of C-stars to M-stars
to investigate the metallicity distribution throughout the disk. The C/M-star ratio is
found to increase and flatten with galactocentric distance in agreement with viscous disk formation models. The C-star Luminosity function is found to be similar to the SMC and M31 making C-stars possible distance indicators.
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Extent |
4265745 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-10-31
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0085695
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2003-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.