KIC 8462852 Observations |
KIC 8462852 Observations |
Oct 15 2015, 04:45 PM
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
Kepler found one very, very strange case:
http://www.theatlantic.com/science/archive...-galaxy/410023/ In a nutshell, while Kepler was observing it, the star (larger and brighter than the Sun) exhibited four dimming events that took place at irregular intervals, blocked a lot more light than a Jupiter-sized planet would block, and had a "shape" that varied in all four cases and did not resemble a planet. This case is attracting some wild speculation… in fact, it is seemingly certain that something wild must be going on; it's just a matter of which wild scenario is the correct one. If I had to throw my hat in the ring, I'd guess that a distant collision and breakup has placed big swarms of matter into a very long-period orbit. But there's no hypothesis that's been offered that doesn't seem problematic. |
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Jan 14 2016, 04:16 PM
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Black holes (besides hypothesized primordial ones) have a minimum mass a few (1.5 to 3) solar masses, since they form by overcoming the Chandrasekhar mass limit for neutron stars (Tolman–Oppenheimer–Volkoff limit). A Black Hole sufficiently close to a main sequence star to accrete its outer hull would form a fast-rotating binary system with the star, usually causing high radial velocities relative to Earth. This would cause a considerable oscillation of the Doppler shift of the spectrum of the star, and would hence be immediate by spectral observations.
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