Stars/Novas/Quiz - Wikiversity

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 {{stars resources}} template, you should have adequate background to score 100 %.

Suggestion: Have the lecture available in a separate window.

Enjoy learning by doing!

Quiz

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Hypotheses

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

External links

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Learn more about Nova-like stars

	ultraviolet emission
	X-ray emission
	gamma-ray emission
	optical emission
	broken synchronism
	circular polarization

	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%.

	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

	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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