Exercise 2 - The Distance to M100 as Determined By Cepheid Variable Stars

In this exercise we measure the period and apparent magnitudes of Cepheid variables in the galaxy M100. The absolute magnitude is derived using the Period-Luminosity relation and the distance to M100 can then be determined using the distance relation. Finally we calculate a value for the Hubble constant (using a value for the recession velocity of M100 observed by other scientists) and estimate the age of the Universe.

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Exercise 2 PDF files

• Exercise 2 in low resolution (3 MB)
• Exercise 2 in high resolution (6.9 MB)