Stars/Nova-likes/Quiz

Nova-like stars is a lecture about an entity, source, and/or object observed using radiation astronomy.

You are free to take this quiz based on nova-like stars. 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 a nova-like star? + ultraviolet emission + X-ray emission - gamma-ray emission + optical pulsations + broken synchronism + circular polarization
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{Yes or No, In nova-like stars the binary system is visible. + Yes - No
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{Which of the following is not a characteristic of a nova-like star? - 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, UX Ursae Majoris is a Nova-like Star. + 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: As far as { long-term (i) } brightness changes are concerned, magnetic and { non-magnetic (i) } nova-like stars behave in the { same way (i) }.
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{True or False, That the central star in some nova-like systems has magnetic properties has nothing to do with the outburst behavior. + 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 nova-like star is a close binary system with a white dwarf as a primary and a late-type main-sequence secondary star filling its { Roche (i) } lobe.
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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.