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CCD Observations of the Andromeda Galaxy - EL Obs 4

SPU-21 Fall 2014

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In this lab, we will measure one of the most basic properties of a galaxy: its mass and stellar composition. Our goal is to measure the B, V, R magnitudes of the center Bulge (bright region around the nucleus) of the Andromeda galaxy (M31) and deduce its age. Using the integrated magnitude in V-band at several different aperture radii), we will deduce the approximate total stellar mass within each radius, given your measured B-V color and thus the spectral type and mass within that radius.




Now that you have your B and V magnitudes for M31 we can do some analysis. Use the HR Diagram Handout for reference. Enter your data into the analysis table (pdf or docx).