Concept explainers
(a)
The radial velocity of Barnard’s star.
(a)
Answer to Problem 5.1P
The radial velocity of Barnard’s star is
Explanation of Solution
Write the expression for radial velocity of Barnard’s star.
Here,
Conclusion:
Substitute
Thus, the radial velocity of Barnard’s star is
(b)
The transverse velocity of Barnard’s star.
(b)
Answer to Problem 5.1P
The transverse velocity of Barnard’s star is
Explanation of Solution
Write the expression for distance between star and earth.
Here,
Write the expression for transverse velocity of Barnard’s star.
Here,
Conclusion:
Substitute
Substitute
Thus, the transverse velocity of Barnard’s star is
(c)
The speed of Barnard’s star through space.
(c)
Answer to Problem 5.1P
The speed of Barnard’s star through space is
Explanation of Solution
Write the expression for speed of Barnard’s star.
Here,
Conclusion:
Substitute
Thus, the speed of Barnard’s star through space is
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Chapter 5 Solutions
EBK AN INTRODUCTION TO MODERN ASTROPHYS
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