Stars/Novas/Quiz

Novas is a lecture about an entity, source, and/or object observed using radiation astronomy.

You are free to take this quiz based on novas. Once you've read and studied it, the links contained within, listed under See also, External links and the template, you should have adequate background to score 100 %.

Suggestion: Have the lecture available in a separate window.

Enjoy learning by doing!

Quiz
{Which of the following are radiation astronomy phenomena associated with novas? + ultraviolet emission + X-ray emission + gamma-ray emission + optical emission - broken synchronism - circular polarization
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{Yes or No, A hypernova is a type of stellar explosion with a luminosity 10 or more times higher than that of standard supernovae. + Yes - No
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{Which of the following is not a characteristic of a nova? - only irregular small-scale brightness changes - occasional drops in luminosity - accretion disks - white dwarfs possess magnetic fields of appreciable strength + a surface spot coverage of at least 95%.
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{Gas around V838 Monocerotis, nova-like star, seemed to be expanding { faster than light (i) } from Earth.
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{True or False, A nova is a star showing a sudden large increase in brightness and then slowly returning to its original state over a few months. + TRUE - FALSE
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{UX Ursae Majoris as a star has what spectroscopic properties? + orbital light curve similar to DQ Her + its orbital period is longer than DQ Her by only 5 minutes + shape of the eclipse is similar to DQ Her + hump near to the eclipse is similar to DQ Her - it has a surface temperature of ~700 K + it's an X-ray source
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{Complete the text: A recurrent nova is produced by a { white (i) } dwarf star and a red { giant (i) } circling about each other in a { close (i) } orbit.
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{True or False, Novae are relatively common in the Andromeda galaxy (Messier 31). + TRUE - FALSE
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{When magnetic stars are present, what characteristics are readily observed? + same brightness changes as non-magnetic nova-like stars - bright accretion disk + matter swirling along field lines + some flow velocities come from magnetically channeled plasma - appear to be much more prevalent than non-magnetic stars - neon clouds
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{A luminous red nova is a stellar explosion thought to be caused by the merger of { two (i) } stars.
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Hypotheses

 * 1) Stars that emit light do so because they are receiving electron irradiation.
 * 2) Nova-like activity in stars may be due to a larger star companion.