21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Question
Chapter 15, Problem 37QP
(a)
To determine
Reason why a B8 main-sequence star ionize far more interstellar hydrogen.
(b)
To determine
Properties of star determining whether it can ionize large amounts of interstellar hydrogen.
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You discover a binary star system in which one member is a 15 solar-mass main-sequence star and the other star is a 10
solar-mass giant. Why should you be surprised, at least at first?
A. It doesn't make sense to find a giant in a binary star system.
B. The two stars in a binary system should both be at the same point in stellar evolution; that is, they should either both
be main-sequence stars or both be giants.
C. The two stars should be the same age, so the more massive one should have become a giant first.
D. The odds of ever finding two such massive stars in the same binary system are so small as to make it inconceivable
that such a system could be discovered.
E. A star with a mass of 15 solar-mass is too big to be a main-sequence star.
A group of graduate students, bored during a cloudy night at a the observatory, begin to make bets about the time different stars will take to evolve.
If they have a cluster of stars which were all born roughly the same time, and want to know which star will become a red giant first, which of the following stars should they bet on?
a. a star that would type O on the main sequence star
b. a star about 1/2 the mass of our sun
c. a star about 8% the mass of our sun
d. all stars reach the red giant stage in roughly the same number of years
What kind of star is most likely to become a white-dwarf supernova?
A. a star like our Sun
B. a white dwarf star with a red giant binary companion
C. a pulsar
D. an O star
Is the answer B?
For D, as the surface temperature of a star would change over time so spectral type cannot tell us about the fate of the stars?
Chapter 15 Solutions
21st Century Astronomy
Ch. 15.1 - Prob. 15.1CYUCh. 15.2 - Prob. 15.2CYUCh. 15.3 - Prob. 15.3CYUCh. 15.4 - Prob. 15.4CYUCh. 15 - Prob. 1QPCh. 15 - Prob. 2QPCh. 15 - Prob. 3QPCh. 15 - Prob. 4QPCh. 15 - Prob. 5QPCh. 15 - Prob. 6QP
Ch. 15 - Prob. 7QPCh. 15 - Prob. 8QPCh. 15 - Prob. 9QPCh. 15 - Prob. 10QPCh. 15 - Prob. 11QPCh. 15 - Prob. 12QPCh. 15 - Prob. 13QPCh. 15 - Prob. 14QPCh. 15 - Prob. 15QPCh. 15 - Prob. 16QPCh. 15 - Prob. 17QPCh. 15 - Prob. 18QPCh. 15 - Prob. 19QPCh. 15 - Prob. 20QPCh. 15 - Prob. 21QPCh. 15 - Prob. 22QPCh. 15 - Prob. 23QPCh. 15 - Prob. 24QPCh. 15 - Prob. 25QPCh. 15 - Prob. 26QPCh. 15 - Prob. 27QPCh. 15 - Prob. 28QPCh. 15 - Prob. 29QPCh. 15 - Prob. 30QPCh. 15 - Prob. 31QPCh. 15 - Prob. 32QPCh. 15 - Prob. 33QPCh. 15 - Prob. 35QPCh. 15 - Prob. 36QPCh. 15 - Prob. 37QPCh. 15 - Prob. 38QPCh. 15 - Prob. 39QPCh. 15 - Prob. 40QPCh. 15 - Prob. 41QPCh. 15 - Prob. 42QPCh. 15 - Prob. 43QPCh. 15 - Prob. 44QPCh. 15 - Prob. 45QP
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