Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Physics and Astronomy

First Advisor

Guillermo Gonzalez

Second Advisor

Stephen J. Willson

Third Advisor

James P. Vary

Abstract

Few physical processes can affect the earth's climate on a global scale. The variability of the Sun is one such process. The Sun is known to vary by about 0.1% due to Sunspots and other surface activity. We do not yet know whether the Sun's variability is normal. Using the well-known properties of the old open cluster M67, we look for variations in Sun-like stars.;In this thesis, we present the results of observation, calibration, correction and analysis of stars in M67. We focus on Sun-like stars and binary systems. We also determine the limits of observation using a small research-grade telescope.;We find several known variable stars with comparable amplitudes of variability. Our precision is as high as 10 millimagnitudes, ranging 10-20 for Sun-like stars. Variability is detected as low as 20 millimagnitudes in amplitude. Our current precision, however, fails to detect solar-like variations.

DOI

https://doi.org/10.31274/rtd-180813-16428

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Ryan Wesley Tobin

Language

en

Proquest ID

AAI1453111

OCLC Number

246658950

ISBN

9780549541813

File Format

application/pdf

File Size

118 pages

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