Binary Evolution

Binary Evolution - Binary Evolution Gravity around 2 stars...

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Binary Evolution Gravity around 2 stars o If there are two stationary stars, then at some points in space where the gravitational attraction can balance: But 2 stationary stars would fall together due to their mutual gravity If inbetween two stars, equally attracted to mass on left and right – wouldn’t move Binary stars because they fall towards each other and perpendicularly to their orbit Both stars orbit around another o Normally circular Lowest energy state of binary system o Rotational period of stars same as orbital period, therefore keep the same face to each other Also part of lowest energy state of the system Roche Surface/Critical Surface o 2 unequal mass stars material at the lagrange point (where each gravitational field is cancelled out) will orbit stably also orbit with the stars material close enough to star 1 will fall towards star 1 material close enough to star 2 will fall towards star 2 “close enough” defines a surface in space called
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This note was uploaded on 03/16/2011 for the course ASTR 002 taught by Professor Corcoran during the Spring '11 term at GWU.

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Binary Evolution - Binary Evolution Gravity around 2 stars...

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