Supernova X-rays/Quiz

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Rosat image of the Vela supernova remnant and its surroundings. Credit: H.E.S.S. collaboration, F. Aharonian et al.

Supernova X-rays is a lecture about supernovas from a stellar perspective. This quiz is based on the lecture.

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A star's explosion that expels most or all of its material at a velocity of up to 30000 km/s (10% of light speed, powering a shock wave into the interstellar medium is supernova shock breakout from a?



Which of the following are attributes that make Type Ia supernovae potentially valuable standard candles?

occur in dusty regions
present in the old stellar populations of all galaxies
they have characteristic mottling
they lack hydrogen lines in their optical spectra
they lack helium lines in their optical spectra
have incipient resolution
during the first month after maximum light they do have a strong absorption feature produced by the red doublet (λ6347, λ6371 Å) of singly ionized silicon


The non-detection of X-rays reveals that the region around the site of a supernova explosion is relatively devoid of?



Which of the following are associated with standard candles?

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


Yes or No, A Type Ia supernova is an explosion of a white dwarf in orbit around either another white dwarf or a red giant star.



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

Maximum magnitude-rate of decline for novae.gif

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

Blackbody spectral density.gif

SN2005ke labels.jpg

A further away schematic galaxy.gif


Planetary nebulae H-R.gif

Luminosity function for globular clusters.gif



Which of the following are associated with SN 1987A?

blue light
supergiant progenator
at its occurrence it was the brightest supernova and nearest one to Earth in the last century
in the Large Magellanic Cloud (LMC)
almost as luminous as the brightest red supergiants


The brightest stellar explosion ever recorded is?



Which of the following are associated with novae as a standard candle?

old stellar population
amount of Cherenkov light
relatively dust-free environments
easy to recognize


Yes or No, SN 2014J generated extensive amounts of X-rays.



Main source: Hypotheses
  1. Distances are only as relative as the time it takes to travel them.

See also[edit]

External links[edit]

{{Astronomy resources}}{{Physics resources}}