Which spectral feature originating in a galaxy is used in the Tully-Fisher relation, by measuring its width, to determine the intrinsic luminosity of the galaxy?
A) the 2.3-mm microwave emission line from the molecule CO, which is closely associated with molecular hydrogen
B) the Lyman L ultraviolet line from atomic hydrogen
C) the 21-cm radio emission line from atomic hydrogen gas
D) the Balmer H red line from atomic hydrogen
Correct Answer:
Verified
Q31: Why are RR Lyrae variables NOT used
Q32: Scattering by interstellar dust can affect the
Q33: Which of the following properties would NOT
Q34: Type Ia supernovae are frequently used as
Q35: Type Ia supernovae are reliable distance indicators
Q37: Why is the Tully-Fisher relation NOT used
Q38: The fundamental plane technique for ellipticals can
Q39: How does the maser technique work in
Q40: Maser light in distant galaxies can be
Q41: Parallax and masers are two techniques for
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents