Foundations of Astronomy, Enhanced
13th Edition
ISBN: 9781305980686
Author: Michael A. Seeds; Dana Backman
Publisher: Cengage Learning US
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Question
Chapter 9, Problem 11P
To determine
The distance of star is parsecs and light-years unit.
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15: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the distance to this star? Answer: 37
16: What is the absolute magnitude of this star? Answer:1.8
17: Is this star more or less luminous than the Sun? Answer "M" for More luminous or "L" for Less luminous. (HINT: the absolute magnitude of the Sun is 4.8) Answer: M
18: What is the luminosity of this star? (HINT: The luminosity of the Sun is 3.85×1026 W.)
Please answer question #18, #15-17 are correct, the photos provide the work for them.
A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?
If a star is located at 62.5 pc and has an apparent magnitude of 6 what is it absolute magnitude?
Chapter 9 Solutions
Foundations of Astronomy, Enhanced
Ch. 9 - Prob. 1RQCh. 9 - Why was the Hipparcos satellite able to make more...Ch. 9 - Prob. 3RQCh. 9 - Prob. 4RQCh. 9 - Prob. 5RQCh. 9 - Prob. 6RQCh. 9 - Prob. 7RQCh. 9 - Prob. 8RQCh. 9 - Prob. 9RQCh. 9 - Prob. 10RQ
Ch. 9 - Prob. 11RQCh. 9 - Prob. 12RQCh. 9 - Prob. 13RQCh. 9 - Prob. 14RQCh. 9 - Prob. 15RQCh. 9 - Prob. 16RQCh. 9 - Prob. 17RQCh. 9 - Prob. 18RQCh. 9 - Prob. 19RQCh. 9 - Prob. 20RQCh. 9 - Prob. 21RQCh. 9 - Prob. 22RQCh. 9 - Prob. 23RQCh. 9 - Prob. 24RQCh. 9 - Prob. 25RQCh. 9 - Prob. 26RQCh. 9 - Prob. 27RQCh. 9 - Prob. 28RQCh. 9 - Prob. 29RQCh. 9 - Prob. 30RQCh. 9 - Prob. 31RQCh. 9 - Prob. 32RQCh. 9 - How Do We Know? In what way are basic scientific...Ch. 9 - Prob. 1DQCh. 9 - Prob. 2DQCh. 9 - Prob. 3DQCh. 9 - Prob. 4DQCh. 9 - Prob. 5DQCh. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Prob. 4PCh. 9 - Complete the following table:Ch. 9 - Prob. 6PCh. 9 - Prob. 7PCh. 9 - Prob. 8PCh. 9 - Prob. 9PCh. 9 - Prob. 10PCh. 9 - Prob. 11PCh. 9 - Prob. 12PCh. 9 - Prob. 13PCh. 9 - Prob. 14PCh. 9 - Prob. 15PCh. 9 - Prob. 16PCh. 9 - Prob. 17PCh. 9 - Prob. 18PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - Look at the image on the opening page of this...Ch. 9 - Prob. 2LTLCh. 9 - Prob. 3LTLCh. 9 - Prob. 4LTL
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- If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs?arrow_forwardSuppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0×10-12 watt/m?. How far away is it? Give your answer in both kilometers and light-years.arrow_forwardThe star Sirius has an apparent magnitude of -1.46 and appears 95-times brighter compared tothe more distant star Tau Ceti, which has an absolute magnitude of 5.69.(a) Explain the terms apparent magnitude, absolute magnitude and bolometric magnitude.(b) Calculate the apparent magnitude of the star Tau Ceti.(c) Find the distance between the Earth and Tau Ceti.www.arrow_forward
- How far away would the Sun need to be to be just visible to the naked eye (apparent magnitude = 5.90). Hint: the absolute magnitude of the Sun is 4.83. Answer in parsecsarrow_forwardConsider two stars with mV = 2.2 and mV = −1.5. What is their combined visual magnitude? Is the answer plausible.arrow_forwardA star has an apparent magnitude of 6 and an absolute magnitude of 3. How far is the star from Earth?arrow_forward
- A first-magnitude star is 100 times brighter than a sixth magnitude star, which means each difference in magnitude represents a brightness change of 2.51 times. Compare the brightness of Star X which has an apparent magnitude (m) of −5.8 to Star Y, which has an apparent magnitude of −12.9.arrow_forwardIf a star's absolute magnitude value is significantly larger than its apparent magnitude value (Mv>mv), what can you conclude about the star?arrow_forwardThe apparent visual magnitude of star (Rigel) is 0.12. Use the method of spectroscopic parallax to calculate the approximate distance to Rigel in units of parsecs. The absolute visual magnitude of Rigel is −6.8.arrow_forward
- Consider two stars with mV = 2.2 and mV = −1.5. What is their combined visual magnitude? Commenton whether your answer is plausible.arrow_forwardConsider two identical stars, A and B. Star B is 10 times farther away than star A. What is the differencein magnitudes between the two stars?arrow_forwardThe a star system contains two stars, one with apparent magnitude m = 10.5 and the other with m = 10.9. What is the combined apparent magnitude of the two stars?arrow_forward
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