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Author Question: What is Sgr A? A) a source of bright radio emission in the center of our galaxy B) a source of ... (Read 27 times)

tth

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on: Jul 27, 2018
What is Sgr A?
 
  A) a source of bright radio emission in the center of our galaxy
  B) a source of bright ultraviolet light near the center of our galaxy
  C) the brightest star in the constellation Sagittarius
  D) the bulge at the center of our galaxy
  E) a source of bright X-ray emission coming from the entire constellation of Sagittarius

Question 2

Relate a nova and a Type I supernova.
 
  What will be an ideal response?


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ong527

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

A

Answer to Question 2

Both are the result of a binary system consisting of a white dwarf and a stellar companion. If less than 1.4 solar masses, the white dwarf will blow off a shell of accreted matter in a nova explosion. But if enough mass is added to the white dwarf to push it over Chandrasekhar's limit, it will explode as a Type I supernova.


tth

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Reply 2 on: Jul 27, 2018
Gracias!

mammy1697

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Reply 3 on: Yesterday
:D TYSM

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