Maybe a massive molecular cloud 104 105 m collided

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Unformatted text preview: dila8on: photons lose energy as they climb out of poten8al well ' 2GM *1 /2 Δt0 ν ∞ λ = = = )1 − , 2 Δt ν0 λ ( r0 c + !! ∞ (valid for Schwarzschild, as=0) •  Tidal destruc8on occurs where objects density is nearly equal to average interior density € M* ≈ 3 !!R* 4/9/2013 M*,R* MBH UW, ASTR 323, SP13, Eric Agol ©2013 R 12 Discovery of a behemoth February 1974, Bruce Balick & Bob Brown Greenbank Interferometer 4/9/2013 UW, ASTR 323, SP13, Eric Agol ©2013 13 Galac8c center in radio & X- ray: Sgr A* 4/9/2013 UW, ASTR 323, SP13, Eric Agol ©2013 14 Galac8c Center •  Challenge - 31mag of V- band ex8nc8on - 1 of ___ _______ photons makes it through •  Best to study in near- IR •  Star cluster has a number density distribu8on close to r- 2 •  Stars are on highly eccentric orbits 4/9/2013 UW, ASTR 323, SP13, Eric Agol ©2013 15 Stellar orbits 4/9/2013 UW, ASTR 323, SP13, Eric Agol ©2013 16 How did these stars form? •  Maybe a massive molecular cloud, 104- 105 M¤༊, collided with black hole 6 Myr ago, crea8ng stars due to compression & cooling of gas •  Model predicts only ________ st...
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This document was uploaded on 04/05/2014.

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