Two distinct populations of comets identified at Beta Pictoris - TopicsExpress



          

Two distinct populations of comets identified at Beta Pictoris with HARPS. Comet tails transiting a star produce absorption lines in the stellar spectrum. The Doppler shift of these lines gives you their orbital velocity. Repeating transits gives you the orbital period. Using the orbital period and orbital velocity, you can get an idea of the eccentricity of the orbit. eso.org/public/news/eso1432/
Posted on: Wed, 22 Oct 2014 17:31:04 +0000

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