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Radiation astronomy/Active galactic nuclei/Quiz

< Radiation astronomy‎ | Active galactic nuclei
X-Rays Emanate From Heated Material Falling Into Black Hole. Credit: NASA, ESA, A. M. Koekemoer (STScI), M. Dickinson (NOAO) and The GOODS Team.{{free media}}

Active galactic nuclei astronomy is the latest lecture of the course on the principles of radiation astronomy.

It is the flagship lecture for the astronomy department of the school of physics and astronomy.

You are free to take this quiz at any time.

Once you’ve read and studied the lecture itself, the links contained within the lecture and listed under See also and External links, you should have adequate background to to get 100 %. Additional information that may be helpful is in the {{Principles of radiation astronomy}} template.

Suggestion: Have the lecture available in a separate window.

Enjoy learning by doing!

Contents

QuizEdit







  

1

Yes or No, Active galactic nuclei do not occur in spiral galaxies generally.

Yes
No

2

A cosmic ray may originate from what astronomical source?

Jupiter
the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
an active galactic nucleus

3

True or False, Any small luminous green dot appearing in the cloudless portion of the night sky, especially with a fixed location relative to other such dots is most likely to be an active galactic nucleus.

TRUE
FALSE

4

Complete the text:

Match up the standard candle with a representative image:
Tully-Fisher relation - A
surface brightness fluctuations - B
absolute magnitude - C
globular clusters - D
active galactic nuclei - E
Type Ia supernova - F
classical Cepheid variable - G
novae - H
planetary nebula - I
 

 

.
 

.
 

.
 

.
 

.
 

.
 

 

.

5

Complete the text:

Match up the radiation object with the likely source:
 
- L
 
- M
 
- N
 
- O
 
- P
 
- Q
 
- R
 
- S
 
- T
a Craters of the Moon volcano

.
violet image of Venus

.
active galactic nuclear region of NGC 5728

.
cosmic-ray bombardment of the Moon's surface

.
blue lights from Io

.
neutrino profile of the solar octant

.
planetary nebula NGC 7048

.
ultraviolet image of the Earth

.
a neutron star in a binary system

.

6

Complete the text:

Match up the item letter with each of the first astronomical source possibilities below:
Meteors - A
Cosmic rays - B
Neutrons - C
Protons - D
Electrons - E
Positrons - F
Gamma rays - G
Superluminals - H
cosmic rays

galactic nuclei

.
comets

.
electron-positron annihilation

.
weak force nuclear decay

.
AGNs

.
511 keV photon pair production

.
solar wind

.

7

AGNs may be used as standard candles because?

they are extremely luminous
can be observed at very large distances
they emit their own light signature
GeV gamma rays
reverberation mapping
tight relationship between the luminosity of an AGN and the radius of its broad line region

8

Which of the following are associated with standard candles?

Cepheid variables
Type Ia supernovae
the Sun
stellar spectral type
absolute magnitude
Tully-Fisher relation

9

Which of the following are associated with the envelope of the polarization current density?

emission of electromagnetic radiation from a superluminal charged particle
intensity of some components decays as the inverse of the distance from the source
non-spherically-decaying sources
emission contains very high frequencies not present in the synthesis of the source
non-spherically decaying components of the radiation do not violate energy conservation
strong electromagnetic fields are compensated by weak fields elsewhere

10

What may be the first astronomical cosmic-ray source?

Jupiter
the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
an active galactic nucleus


HypothesesEdit

Main article: Hypotheses
  1. Questions about pure astronomy may be most about early astronomy.

See alsoEdit

External linksEdit

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