FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 8: The Family of Stars

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 91

Multiple Choice

Review LaterAdd Note

Review Later

We know that giant stars are larger in diameter than the Sun because

A) they are more luminous but have about the same temperature.
B) they are less luminous but have about the same temperature.
C) they are hotter but have about the same luminosity.
D) they are cooler but have about the same luminosity.
E) they have a larger absolute magnitude than the Sun.

Correct Answer

verified

Show Answer

Question 92

Multiple Choice

Review LaterAdd Note

Review Later

A star's absolute magnitude depends only on the star's

A) distance and diameter.
B) temperature and distance.
C) distance.
D) temperature and diameter.
E) apparent magnitude.

Correct Answer

verified

Show Answer

Question 93

True/False

Review LaterAdd Note

If a star is twice as hot as the Sun and only half the Sun's diameter, it will be less luminous than the Sun.

Hadar has an apparent visual magnitude of 0.6 and an absolute visual magnitude of -5.4. Its distance is 10^2.2 pc.

If two stars are emitting the same amount of light and are the same size, the star that is farther will appear

If we can solve the orbital motion of an eclipsing binary, we can find

We know that the numbers of stars _________ from _______ to ________ on the H-R diagram.

At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system? ​ ​

As shown in the spectra above, sodium is present in _________ spectral classes.

The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true? I. Sheat has a surface temperature less than the Sun. II. Sheat has a diameter that is greater than that of the Sun. III. Sheat is more luminous than the Sun. IV. Sheat is located near the upper left-hand corner in the H-R diagram.

To observe a visual binary, we must measure radial velocities.

-Table 8-2 Use the chart below to answer the following question(s) . Which star in Table 8-2 is the closest to Earth?

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence?

Which graphs of line strength and temperature would give the most precise value of the star's surface temperature?

The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.

____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class.

Compared with the spectral lines in the solar spectrum, lines in a supergiant star's spectrum are

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

In the H-R diagram, roughly 80 percent of all stars are

Compared with the spectral lines in the solar spectrum, lines in a supergiant spectrum are