Question 1 (1 point) Which of the following would not be plotted on the vertical axis...

Question 1 (1 point) Which of the following would not be plotted on the vertical axis of an H-R diagram on which the properties of all stars within 10 parsecs of the Sun are plotted Question 1 options: Absolute Magnitude Light Flux Luminosity Any of the above would be fine Question 2 (1 point) By a star's position on an HR diagram, we can determine its Question 2 options: luminosity, surface temperature and size distance apparent brightness, and mass colour, distance, and chemical composition age, chemical composition, and luminosity age, luminosity, and distance Question 3 (1 point) Sirius B has a mass 1.4 times that of our Sun. Since luminosity increases like mass cubed for stars on the main sequence, such a star would be expected to have a luminosity about 2.7 times brighter than the Sun. Instead, its measured luminosity is only 4 percent that of the Sun. Why? Question 3 options: It is a red giant that has swelled up and hence become cooler and less luminous. It is obscured by its larger companion star, Sirius A. It is not a star, but a planet. It is very distant from us, thus decreasing its luminosity. It is a white dwarf star that does not lie on the main sequence.

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Expert Solution

In this answer I have explained what an HR diagram is with all the quantities along their respective axis and then I have given all right options of asked questions with correct explanation.

genius_generous answered 1 year ago

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