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13 Cards in this Set
- Front
- Back
Mira
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This is the prototype star in which other variable stars (red giants) that have an oscillation period of over 100 days. Just give the name.
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Cetus, 460
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Mira, the prototype star, lies in the ______ constellation and has a distance of approximately _____ LY.
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2.5, 5, 6
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Mira variables typically hang out at about ____ magnitude in visual wavelength, but will typically vary from ___ to ___ magnitudes during their oscillations.
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C
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Mira variables are:
A) Above B) Below C) On D) To the left of the AGB. |
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2
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Mira variables originated from stars that were massive enough to have undergone helium fusion, but had an approximate limit of ___ solar masses. Otherwise, they would have become
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False (the change is caused by a shifting between visual and infrared outputs)
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(True/False) Mira variables will vary vastly in magnitude, the main cause being that their luminosity is rapidly changing during their oscillations.
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True
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(True/False) Mira is a binary star system, consisting of the red giant Mira A and Mira B, a spectral type K variable with an acretion disk captured directly from the Mira system.
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supernova variable
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Mira was the first type of variable star to not be of this type (form: s__________ variable).
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False (Mira A is interacting with interstellar gas as it is flying through space)
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Take note that the Mira system is losing mass. True of False? The mass loss is caused largely because of the fact that Mira B is a pulsar star, similar to the Black Widow, and is blowing away matter from the system.
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False (they're getting stronger)
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(True/False) Mira's successive pulses, lasting about a decade, are progressively growing weaker.
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W49B
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This explosion is believed to have created our galaxy's youngest black hole, and yes, a black hole, not a neutron star. What is it's name?
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True
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(True/False) W49B is a highly distorted supernova remnant, produced by a rare type of explosion.
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A
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Instead of radiating out symmetrically, W49B's exploding star shot more material out from its:
A. Poles B. Equator |