The most easily observed white dwarf in the sky is in the constellation of Eridanus (the...

The most easily observed white dwarf in the sky is in the constellation of Eridanus (the Rover Eridanus). Three stars make up the 40 Eridani system: 40 Eri A is a 4th-magnitude star similar to the Sun; 40 Eri B is a 10th-magnitude white dwarf; and 40 Eri C is an 11th-magnitude red M5 star. This problem deals only with the latter two stars, which are separated from 40 Eri A by 400 AU.

c) The effective temperature of 40 Eri B is 16900 K. Calculate its radius, and compare your answer to the radii of the Sun, Earth, and Sirius B.

d) Calculate the average density of 40 Eri B, and compare your result with the average density of Sirius B. Which is more dense, and why?

e) Calculate the product of the mass and volume of both 40 Eri B and Sirius B. Is there a departure from the mass-volume relation? What might be the cause?

Please clearly show me the answers to this question, with clear explanation and procedure! Thanks!

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genius_generous answered 2 years ago

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