Reading B Questions - Questions 1 Look at Figure 1A Did the system suddenly brighten at JD55000 Make your case 2 You have narrow eclipses and wide

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Questions 1. Look at Figure 1A. Did the system suddenly brighten at JD55000? Make your case. 2. You have narrow eclipses and wide eclipses. About how wide is each? Why the different widths? To answer this think about the two things that eclipse width depends on. 3. Figure 1D and F show the BC binary in front of A. Dashed lines are the times of primary (BC) eclipses and dotted lines the times of secondary (BC) eclipses. Why does one get a bit of brightening at secondary? The secondary is brighter because A is brighter than BC and BC is in front of A. 4. The paper says A contributes 99.29% of the system light and the B and C contribute 0.44% and 0.27%, respectively. How do they get absolute magnitudes M V (B) = 5.6 and M V (C) = 6.1 for the two fainter components? (see supplement) 5. How do they get estimates of the spectral types of the B [G8 V] and C [K1 V]? 6. Look at this and get an estimate of the surface temperature of B and C? Is the temperature they get for A from spectra consistent with question #3 above? 7. How many flares do you see in this curve? In Figure 1B, about how long is the flare?
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This note was uploaded on 02/12/2012 for the course ASTR 1110 taught by Professor Jpc during the Spring '08 term at University of Georgia Athens.

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