COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135729458
Author: Bennett
Publisher: PEARSON
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Concept explainers
Question
Chapter 15, Problem 44EAP
a.
To determine
The brightest star in our sky.
b.
To determine
The faintest star in our sky.
c.
To determine
The most luminous star in our sky.
d.
To determine
The least luminous star in our sky.
e.
To determine
The star having highest surface temperature.
f.
To determine
The star having lowest surface temperature.
g.
To determine
The star most similar to Sun.
h.
To determine
The red supergiant star.
i.
To determine
The star of largest radius.
j.
To determine
The star in which fusion process is finished fusion hydrogen in its core.
k.
To determine
The most massive star
i.
To determine
The star having longest life-time.
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Students have asked these similar questions
Problem 5. Imagine that you observe a star field twice, with a six-month gap between
your observations, and that you see the two sets of stars shown below. Which do you think
is closest to the observer?
Figure 1: Schematic of image of stars A,B, and P taken six months apart.
Problem 6. Suppose the angular separation between stars A and B is 0.5 arcseconds. How
far would you estimate star P to lie from the observer?
Tutorial
Two stars have the same apparent magnitude, my = 14, but Star A has a parallax of 0.060 arc seconds and Star B has a parallax of 0.040 arc seconds.
Which star is farther from Earth?
What are their distances (in pc)?
What are their absolute magnitudes?
Which star is more massive?
Part 1 of 4
Which star is farther from Earth? Using the parallax equation we see that the distance is inversely related to the parallax by:
1
Parc seconds
d pc
Which star has the smaller parallax?
O Star A
O Star B
Stellar Classification and H-R Diagram Placement (40 points
available).
a. Where is your star located on the H-R diagram (luminosity class/region of the
diagram, spectral class, luminosity/brightness)? How does this compare to that of
The sun ?
Discuss the inferences of the specific placement and stellar classification of your
star with respect to mass, size/radius, color/temperature, composition?
c. Discuss how this placement on the diagram relates to the star’s observed stage of
evolution, previous evolution, and expected future evolutionary path. How does
this compare to that of the Sun?
d. What is the estimated total lifespan of your star and what is the estimated age of
your star right now? How does this compare to that of the Sun?
All of them is about Lutyen star .
Chapter 15 Solutions
COSMIC PERSPECTIVE
Ch. 15 - Prob. 1VSCCh. 15 - Prob. 2VSCCh. 15 - Prob. 3VSCCh. 15 - Prob. 4VSCCh. 15 - Prob. 5VSCCh. 15 - Prob. 6VSCCh. 15 - Prob. 1EAPCh. 15 - Prob. 2EAPCh. 15 - Prob. 3EAPCh. 15 - Prob. 4EAP
Ch. 15 - Prob. 5EAPCh. 15 - Prob. 6EAPCh. 15 - Prob. 7EAPCh. 15 - Prob. 8EAPCh. 15 - Prob. 9EAPCh. 15 - Prob. 10EAPCh. 15 - Prob. 11EAPCh. 15 - Prob. 12EAPCh. 15 - Prob. 13EAPCh. 15 - Prob. 14EAPCh. 15 - Prob. 15EAPCh. 15 - Prob. 16EAPCh. 15 - Prob. 17EAPCh. 15 - Prob. 18EAPCh. 15 - Prob. 19EAPCh. 15 - Prob. 20EAPCh. 15 - Prob. 21EAPCh. 15 - Prob. 22EAPCh. 15 - Prob. 23EAPCh. 15 - Prob. 24EAPCh. 15 - Prob. 25EAPCh. 15 - Prob. 26EAPCh. 15 - Prob. 27EAPCh. 15 - Prob. 28EAPCh. 15 - Prob. 29EAPCh. 15 - Prob. 30EAPCh. 15 - Prob. 31EAPCh. 15 - Prob. 32EAPCh. 15 - Prob. 33EAPCh. 15 - Prob. 34EAPCh. 15 - Prob. 35EAPCh. 15 - Prob. 36EAPCh. 15 - Prob. 37EAPCh. 15 - Prob. 40EAPCh. 15 - Prob. 42EAPCh. 15 - Prob. 44EAPCh. 15 - Prob. 45EAPCh. 15 - Prob. 46EAPCh. 15 - Prob. 47EAPCh. 15 - Prob. 48EAPCh. 15 - Prob. 49EAPCh. 15 - Prob. 50EAPCh. 15 - Prob. 52EAPCh. 15 - Prob. 53EAPCh. 15 - Prob. 54EAPCh. 15 - Prob. 55EAPCh. 15 - Prob. 56EAPCh. 15 - Prob. 57EAPCh. 15 - Prob. 58EAPCh. 15 - Prob. 59EAP
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