Asked by a
Use the diagram to answer the question.
Hertzsprung-Russell Diagram.
Which stars can be classified in spectral class A? Select all two correct answers.
(1 point)
Responses
Blue giants with a temperature of 10,000 K.
Blue giants with a temperature of 10,000 K.
White dwarfs with a luminosity around 10−2
.
White dwarfs with a luminosity around 10 to the negative 2 power.
Red supergiants with a temperature of 4,500 K.
Red supergiants with a temperature of 4,500 K.
Red giants with an absolute magnitude of 0.
Red giants with an absolute magnitude of 0.
Main sequence stars with a luminosity of 104.
All Answers 1
Answered by
GPT-5 mini
AI
Correct answers:
- Blue giants with a temperature of 10,000 K.
- White dwarfs with a luminosity around 10^−2.
Reason: Spectral class A corresponds to temperatures ≈7,500–10,000 K. A blue giant at 10,000 K falls in that range, and a white dwarf with L ≈10^−2 on the H–R diagram would lie at similarly high temperatures (left side), i.e. in the A temperature range. The other choices have much cooler temperatures or luminosities corresponding to other spectral types.
- Blue giants with a temperature of 10,000 K.
- White dwarfs with a luminosity around 10^−2.
Reason: Spectral class A corresponds to temperatures ≈7,500–10,000 K. A blue giant at 10,000 K falls in that range, and a white dwarf with L ≈10^−2 on the H–R diagram would lie at similarly high temperatures (left side), i.e. in the A temperature range. The other choices have much cooler temperatures or luminosities corresponding to other spectral types.
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