A star has a spectral class M. What type of star could this be?
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Foundations of Astronomy (MindTap ...
14th Edition
Michael A. Seeds + 1 other
Publisher: Cengage Learning
ISBN: 9781337399920
BuyFindlaunch
Foundations of Astronomy (MindTap ...
14th Edition
Michael A. Seeds + 1 other
Publisher: Cengage Learning
ISBN: 9781337399920
Solutions
Chapter
Section
Chapter 9, Problem 19RQ
Textbook Problem
A star has a spectral class M. What type of star could this be?
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Foundations of Astronomy (MindTap Course List)
Ch. 9 - Why are Earth-based parallax measurements limited...Ch. 9 - Why was the Hipparcos satellite able to make more...Ch. 9 - Star A and Star B have measured stellar parallax...Ch. 9 - What do the words absolute and visual mean in the...Ch. 9 - If a stars apparent magnitude is equal to its...Ch. 9 - A star is observed to have no proper motion. What...Ch. 9 - What does luminosity measure that is different...Ch. 9 - Why are hydrogen Balmer lines strong in the...Ch. 9 - Why are TiO (titanium oxide) features visible in...Ch. 9 - You observe strong FeH (iron hydride) lines but...
Ch. 9 - Explain the interrelationships among Table 9-1,...Ch. 9 - Why does the luminosity of a star depend on both...Ch. 9 - If luminosity depends on radius and temperature,...Ch. 9 - Star As luminosity is four times greater than Star...Ch. 9 - The difference in surface temperature of two stars...Ch. 9 - How can you be sure that supergiants really are...Ch. 9 - A star is listed in the catalog as being a type G2...Ch. 9 - What evidence shows that white dwarfs must be very...Ch. 9 - A star has a spectral class M. What type of star...Ch. 9 - A star is known to be much larger than a...Ch. 9 - What observations would you make to classify a...Ch. 9 - Why does the orbital period of a binary star...Ch. 9 - A star seems to have no measurable stellar...Ch. 9 - What observations would you make to study an...Ch. 9 - Why dont astronomers know the inclination of a...Ch. 9 - You observe a star system for many weeks. The...Ch. 9 - How do the masses of stars along the main sequence...Ch. 9 - Why is it difficult to find out how common the...Ch. 9 - What is the most common type of star?Ch. 9 - Which is the most common nonmain-sequence star...Ch. 9 - If you look only at the brightest stars in the...Ch. 9 - How Do We Know? What is the missing link in the...Ch. 9 - How Do We Know? In what way are basic scientific...Ch. 9 - If a star has a parallax of 0.050 arc second, what...Ch. 9 - Celestial object A is located 5 ly from Earth....Ch. 9 - Star A is located five times farther from Earth...Ch. 9 - If a star has a parallax of 0.016 arc second and...Ch. 9 - Complete the following table:Ch. 9 - Star A is located four times farther from Earth...Ch. 9 - Determine the spectral types and temperatures of...Ch. 9 - You find the spectra of a celestial object and...Ch. 9 - If a main-sequence star has a luminosity of 400 L,...Ch. 9 - The apparent visual magnitude of Arcturus is 0.04....Ch. 9 - If a star has an apparent magnitude equal to its...Ch. 9 - An O8 V star has an apparent visual magnitude of...Ch. 9 - Assume that an O main-sequence star and a B...Ch. 9 - At the position of Earth, the total flux of...Ch. 9 - In the following table, which star is brightest in...Ch. 9 - What is the total mass of a visual binary system...Ch. 9 - In a binary star system, the average separation...Ch. 9 - If an eclipsing binary has a period of 32 days,...Ch. 9 - Estimate the luminosity of a 3-solar-mass...Ch. 9 - One main-sequence star is three times more massive...Ch. 9 - The largest red supergiant stars have about 1000...Ch. 9 - White dwarfs have about 1/100 the diameter of the...Ch. 9 - Arrange the following star classes going from the...Ch. 9 - Look at the image on the opening page of this...Ch. 9 - Look at Figure 9-2. A star appears to have moved...Ch. 9 - Look at Figure 9-9. Why is the lava nearest the...Ch. 9 - If all of the stars in this photo are members of...
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