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User:Marshallsumter/Radiation astronomy1/Galaxy clusters/Quiz

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File:Whirlpool M51-pr.jpg
This is a composite image of the Whirlpool Galaxy (also known as M51). Credit: Joint Astronomy Centre, University of British Columbia and NASA/HST (STScI).{{fairuse}}

Galaxy cluster astronomy is a lecture for the radiation astronomy department course on the principles of radiation astronomy.

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Quiz

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1 Yes or No, Particle radiation consists of a stream of charged or neutral particles, from the size of subatomic elementary particles upwards of rocky, liquid, plasma, and gaseous objects to even larger more loosely bound entities such as galaxies, galaxy clusters and strings with measurable motion.

Yes
No

2 Which of the following are associated with globular clusters as a standard candle?

characteristic mottling
luminosity functions
turnover point
incipient resolution
dispersion of the distribution
easy to recognize
log-normal function

3 Yes or No, An intergalactic medium is a medium in between interplanetary and interstellar media.

Yes
No

4 Complete the text:

Match up the item letter with each of the possibilities below:
Intracluster medium - A
Mayall's object - B
M82 PAHs - C
Milky Way bubbles - D
Local Hot Bubble - E
Stephan's Quintet - F
UGC 8335 - G
Arp 272 - H

File:Outflow from M82 galaxy.jpg

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File:Stephan's Quintet with annotation.jpg

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File:A2199 Xray Optical2.jpg

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5 True or False, An intergalactic medium is a rarefied plasma rather than a gaseous medium.

TRUE
FALSE

6 Which of the following is not a characteristic of X-radiation in the IGM?

X-rays come from the IGM
an X-ray background
shock heating
secondary ionizations and excitations
far more likely to be absorbed by He I rather than H I

7 Do we know enough about the intergalactic medium to trust measurements of background sources seen through foreground

?

8 Complete the text:

Whether the thermal IGM is

or collisionless at scales smaller than the scale

scale depends on the effect of reduced

that is mediated by the plasma

.

9 True or False, Star clusters have been discovered to occur outside a galaxy.

TRUE
FALSE

10 Which of the following are phenomena associated with strong forces in the IGM?

stochastic acceleration
hottest clusters
scaling of the acceleration efficiency with IGM temperature
collisionless IGM
placid magnetic compressions
the smaller the mean free path
cold regions
least effective for inducing the instability

11 True or False, O VI is a lithium-like ion.

TRUE
FALSE

12 Which of the following are phenomena associated with electromagnetic cascades?

spectral and timing properties of astronomical sources
very high-energy γ-rays
the way from the source to the Earth
soft X-rays
redshifts
ambient radiation fields inside the γ-ray source
source stability
protons

13 True or False, The hierarchical clustering model has the gravitational effects of dark matter drive the evolution of structure from the near-uniform recombination epoch until the present day.

TRUE
FALSE

14 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

.

15 True or False, As a galaxy is made up of millions or billions of stars, a solitary star does not exist in a galaxy.

TRUE
FALSE

16 Spiral galaxies have which of the following in common?

spiral arms
a spheroidal shape
may appear lenticular
is irregular
arms of younger stars
may contain star clusters
dust lanes

17 Phenomena associated with the Milky Way are?

spiral arms
a spheroidal shape
a standard to differentiate dwarf galaxies
often referred to as the Galaxy
arms of younger stars
contains star clusters
dust lanes
extended red emission (ERE)
a faint galaxy heavy with dark matter may orbit it
larger than the Andromeda galaxy

18 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

File:Maximum magnitude-rate of decline for novae.gif

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File:B-, R-, I-, and H-band Tully-Fisher relations.gif

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File:Blackbody spectral density.gif

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File:A further away schematic galaxy.gif

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File:1-agnsasanewst.jpg

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File:Planetary nebulae H-R.gif
File:Luminosity function for globular clusters.gif

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19 Complete the text:

Match up the item letter with each of the possibilities below:
Einstein ring - A
stellar nebula - B
Andromeda galaxy - C
Triplet galaxies interacting - D
Hubble galaxies - E
Dark matter halo simulation - F
Fairall 9 (Seyfert galaxy in X-rays) - G
Tycho Brahe observatory, remotely controlled telescope, captured galaxy - H

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.

.

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.

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20 Complete the text:

Match up the item letter with each of the possibilities below:
Sa - A
Sb - B
Sc - C
SBa - D
SBb - E
SBc - F
Irr - G
S0 - H

.

.

.

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File:NGC 2859.jpg

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21 True or False, 3C 295 is a galaxy cluster filled with a vast cloud of 50 MK gas and plasma.

TRUE
FALSE

22 Complete the text:

Match up the item letter with each of the possibilities below:
E0 - A
E1 - B
E2 - C
E3 - D
E4 - E
E5 - F
E6 - G
E7 - H

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23 Which of the following are associated with elliptical galaxies as a standard candle?

observations made through a narrow band 5007 filter
luminous galaxies
star forming regions
the Faber-Jackson relation
relationship between luminosity and central velocity dispersion
quantitative techniques based on Fourier or cross correlation methods
strongly clustered
single dominant young stellar population

24 Which of the following are characteristics of cosmogonic X-rays?

gravitationally unbound
an X-ray emitting gas that is roughly a homogeneous intercluster medium
ultra-hot hidden gas
gas can be hidden in intergalactic space
X-ray background
stellar coronal X-rays


Hypotheses

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Main resource: Hypotheses
  1. Meteors range in size from galaxy clusters to dust grains and molecular clusters.

See also

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[edit | edit source]

{{Radiation astronomy resources}}

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