The impact of abundance variations on photometric luminosity indicators

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dc.contributor.advisor Robertson, Thomas H. (Thomas Herbert) en_US DeCocq, John D. en_US 2011-06-03T19:37:32Z 2011-06-03T19:37:32Z 1996 en_US 1996
dc.identifier LD2489.Z78 1996 .D43 en_US
dc.description.abstract Red dwarf stars are one proposed solution to the dark matter problem in the Milky Way Galaxy These cool, low luminosity stars are difficult to detect and segregate in surveys. This study utilizes photometric data obtained on the Kron-Cousins photometric system to develop criteria that classifies stars as red. Two of the color indices are then used to create a two-color diagram to allow separation of giant and dwarf stars. An algorithm based on calculated equations is provided to separate the giant and dwarf stars after detection. A third class of stars, subdwarfs, is addressed as a potential problem in future surveys. Some suggestions for detecting and removing these contaminating stars from the data are offered. Finally, a colormagnitude diagram is developed for red dwarf stars with KronCousins photometry. This curve allows for fairly accurate determination of photometric parallaxes for the red dwarf stars.An attempt was made to segregate the red dwarfs into velocity classes prior to calibrating the color-magnitude diagram. It was found that this approach offered no additional useful information.
dc.description.sponsorship Department of Physics and Astronomy
dc.format.extent iii, 67 leaves : ill. ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Red dwarf stars. en_US
dc.subject.lcsh Stars -- Masses. en_US
dc.subject.lcsh Astronomical photometry. en_US
dc.subject.lcsh Stars -- Color. en_US
dc.title The impact of abundance variations on photometric luminosity indicators en_US Thesis (M.S.)
dc.identifier.cardcat-url en_US

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  • Master's Theses [5454]
    Master's theses submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

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