What is a spectroscopic binary?
A) an instrument for taking spectra of two sources simultaneously
B) a binary system detected through the shifting spectral lines of its stars
C) a binary system in which one star moves directly in front of the other
D) a pair of stars that are very close to each other on the sky but are not physically related
Correct Answer:
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Q244: Use the Hertzsprung-Russell diagram (Figure 12-7) and
Q245: The radial velocity curve of a star
Q246: Which of these could plausibly be the
Q247: Using the Hertzsprung-Russell diagram in Figure 12-7
Q248: A simple relationship exists between mass and
Q250: Is there a relationship between the mass
Q251: Which of these types of main-sequence stars
Q252: As one moves along the main sequence,
Q253: Absorption lines in the spectra of some
Q254: Where are the MOST massive stars to
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