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Author Question: Contrast the internal structures and properties of neutron stars with white dwarf and main sequence ... (Read 90 times)

dollx

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on: Jul 27, 2018
Contrast the internal structures and properties of neutron stars with white dwarf and main sequence stars.
 
  Specifically, what processes in each balance the inward pull of gravity; what are their energy sources; and what are their sizes, densities, and temperatures?

Question 2

What does angular resolution measure?
 
  A) the angular size of the smallest features that the telescope can see
  B) the brightness of an image
  C) the size of an image
  D) the number of electromagnetic waves captured by an image


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sailorcrescent

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Reply #1 on: Jul 27, 2018
Answer to Question 1

Main sequence: Internal structure is hydrogen fusing to helium, which provides energy. Outward heat pressure balances gravity. Size: around 106 km. Density: 103 kg/m3. Temperature: 107 K in core, 6000 K at surface.
White dwarf: Internal structure is ultra-compressed carbon; energy from residual heat; gravity balanced by electron degeneracy; Size: 104 km; Density: 109 kg/m3; Temperature: 5  104 K at surface.
Neutron star: Internal structure is tight-packed neutrons; gravity balanced by neutron degeneracy; energy from rotational kinetic energy and residual heat; Size: 10 km; Density: 1018 kg/m3; Temperature: unknown.

Answer to Question 2

A


dollx

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

frankwu0507

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Reply 3 on: Yesterday
Excellent

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