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Unformatted text preview: 3/15/2010 1 Which star of the following stars, has the coolest surface temperature? A. A4 IV Question 5 ‐ 1 B. B8 V C. G2 V D. M1 V E. K2 IV Of the following spectral types, which represents a star on the Main Sequence? A. A1 IV B B2 V Question 5 ‐ 2 B. B2 V C. K1 III D. F2 I E. More than one of the above is a Main Sequence star How are distances to a star determined using the technique known as spectroscopic parallax? A. By using a spectroscope during the measurements for parallax Question 5 ‐ 3 B. By determining the apparent magnitude of the star C. By determining the spectral class of the star and using an H ‐ R diagram D. Both B and C above are required to determine distances to stars E. none of the above can provide an estimate of distance 3/15/2010 2 On an HR Diagram, where might you find a blue supergiant? A. In the lower left hand quadrant. B In the lower right hand quadrant Question 5 ‐ 4 B. In the lower right hand quadrant. C. In the upper left hand quadrant. D. In the upper right hand quadrant. E. Blue supergiants are found scattered throughout the entire HR Diagram. An important aspect of binary star systems, as distinct from single stars, is that they allow a A. measurement of the masses of stars....
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- Spring '08
- Astrology, main sequence, Cepheid Cepheid