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Question: multichoice 9 which of the following features indicate a galaxy...

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Multi-Choice 

 

9. Which of the following features indicate a galaxy has a merger history?

i. Presence of a disc

ii. Stellar populations with retrograde motions

iii. Hot gaseous halos emitting in X-ray

iv. Visible shells, ripples and streams

v. Presence of a super-massive black hole

(a) i, ii & iii

(b) ii & iv

(c) ii, iv & v

(d) ii, iii, iv & v

(e) All of the above

 

 

10. Which of the following statements about the dark matter halos of galaxies are true?

i. Dark matter halos are only detectable via their gravitational effects

ii. Dark matter halos extend far past the luminous matter

iii. Dark matter halos make up a significant part of a galaxy’s mass

iv. The presence of dark matter influences a galaxy’s maximum rotational velocity

v. Dark matter bends light

(a) i, ii & iv

(b) i, iii & v

(c) i, ii, iii & v

(d) None of the above

(e) All of the above

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