< Stars < Nova-likes

Stars/Nova-likes/Quiz

"Mini Supernova" Explosion Could Have Big Impact. Credit: X-ray: NASA/CXC/RIKEN/D.Takei et al; Optical: NASA/STScI; Radio: NRAO/VLA.

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 {{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

Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:

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

	Yes
	No

	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%.

from Earth.

	TRUE
	FALSE

	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

As far as

brightness changes are concerned, magnetic and

nova-like stars behave in the

	TRUE
	FALSE

	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

lobe.

Hypotheses

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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