Why hydrogen absorption lines are weak in o and m stars
What is the fundamental explanation (in terms of atomic physics) of why hydrogen absorption lines are weak in O and M stars and strong in A stars. Why are molecular absorption lines strong in K and M stars but weak in O, B and A stars?
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What is the fundamental explanation (in terms of atomic physics) of why hydrogen absorption lines are weak in O and M stars and strong in A stars.
Use methods of descriptive statistics to summarize the data. Comment on the findings.
Sketch a Hertzsprung-Russell diagram: label the axes, marking off the scales. Indicate the regions on your diagram occupied by main sequence stars, red giants, supergiants, the Sun.
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Suppose that star B also only has half the surface temperature of star A, what is the energy flux from the surface of star B compared to star A? What is the ratio of the radius of star B over the radius of star A.
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Pay attention to the assumptions of this test, and ask, "Does it make sense to interpret the mean of this dependent variable?"
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