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This is a radio image of the source 3C 380. Credit: A. G. Polatidis and P. N. Wilkinson.

Quasars is a lecture about a specific theory from astrophysics for the origin and accumulated changes of star systems. It is an offering from the radiation astronomy department.

You are free to take this quiz based on quasars at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{stars resources}} template. This should give you adequate background to get 100 %.

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Enjoy learning by doing!

Quiz[edit | edit source]


1 Complete the text:

Match up the observatory facility with the observatory:
Ondrejov Observatory - A
Okayama Astrophysical Observatory - B
Orbiting Astronomical Observatory - C
Metsähovi Radio Observatory - D
Tortugas Mountain Planetary Observatory - E
Pierre Auger Observatory - F
Observed quasar 3C 454.3 in the spring of 2005.

A solar telescope.

Detector components.

Data on AG Peg were obtained with the ultraviolet broad-band photometers on the second one.

The 0.6 m monitors cloud decks and equatorial activity.

A 188 cm telescope.


2 True or False, Apparent superluminal motion is observed in many radio galaxies, blazars, quasars and recently also in microquasars.


3 Quasar 3C 380 (B1828+487) has which of the following associated with it

a complicated, convoluted structure
kiloparsec scales
a moderate-sized classical double source
a highly complex, filamentary, structure
rapid local brightness changes over its entire ~ 100 pc length
a core that appears to move outwards with a velocity of about 85 c
a bright component that moves with an apparent velocity of about 4 c
peak of emission region that appears to move with an apparent velocity of about 6 c

4 Yes or No, While fusion may be the primary mechanism by which first generation stars produce energy, repulsion between like nucleons may cause neutron emission from a collapsed core.


5 True or False, The apparent acceleration of 3C 380 from ≃ 0.85 c at a few pc to ≃ 6.0 c at 100 pc is similar to that seen in the best-studied superluminal source 3C 345.


6 An unknown object in M82 has an apparent superluminal motion of 4 times the speed of light relative to the galaxy


7 Complete the text:

All known

produce large quantities of


8 The connection between radio loud RLQs and radio quiet quasars RQQs involves which of the following?

a similarity in the physical mechanisms of core radio emission
similar core spectral index distributions
both have diffuse VLBI cores
both appear to be about equally time-variable
both should possess beamed, relativistic jets
both should show superluminal motions

9 True or False, Apparent superluminal motion observed in many radio galaxies, blazars, quasars and microquasars are the first examples of large amounts of mass moving at close to the speed of light.


10 Complete the text:

Match up the item letter with each of the cosmogonic possibilities below:
interior models of the giant planets - A
high interest for cosmogony, geophysics and nuclear physics - B
hierarchical accumulation - C
clouds and globular clusters - D
cosmic helium abundance - E
deuterium fusion - F
a large deficiency of light elements - G
after galactic sized systems had collapsed - H
the motions of hydrogen

formation of luminous quasars

stars with an initial mass less than the solar mass

rotating liquid drops

primordial is less than 26 per cent

a solar mixture of elements dominated by hydrogen and helium gas

around 13 Jupiter masses

smaller rocky objects


11 Yes or No, Apparent superluminal motion can be explained as an optical illusion caused by the object partly moving in the direction of the observer when the speed calculations assume it does not.


See also[edit | edit source]

External links[edit | edit source]

{{Radiation astronomy resources}}