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Transcript
Recycling in the Universe Alyssa A. Goodman Department of Astronomy Harvard University Recycling in the Universe Mass Loss Molecular Clouds Stars Fluctuations about 300,000 years after the Big Bang led to "Structure Formation" Pretty young galaxies "Star Formation" Star "Death": Interstellar Recycling Plants Mass=100 x Sun Distribution of Recycling Plants The "Initial Mass Function" (IMF) Relative Number of Stars The Hertzprung-Russell Diagram 1 e.g. for every "Sun" there are 22 stars with mass 10x smaller than the Sun's 6 5 4 3 2 0.1 6 5 4 3 2 0.01 0.1 1 10 Mass [MSun] 100 Output of Recycling Plants The Hertzprung-Russell Diagram Supernova, then neutron star/pulsar or black hole Red giant then white dwarf Long-lived brown dwarfs Spectacular contribution, and collection. Explosion injects, and "sweeps up" interstellar material. Good recyclables. Red-giant wind main dust injection in ISM. "Styrofoam" A "Supernova " Recycling Plant Swept-up Gas:The Next Generation “Star and Planet Formation” "Cores" and Outflows Giant Molecular Clouds Jets and Disks Solar System Formation "Dark" Clouds (Unusual?) Stellar Nursery in the Eagle Nebula Star Formation Caused by A Galaxy Collision (a.k.a. igniting the trash) Output of Recycling Plants The Hertzprung-Russell Diagram Supernova, then neutron star/pulsar or black hole Red giant then white dwarf Long-lived brown dwarfs Spectacular contribution, and collection. Explosion injects, and "sweeps up" interstellar material. Good recyclables. Red-giant wind main dust injection in ISM. "Styrofoam" "Excess Gas?" Post-red-giant planetary nebula Recycling in the Universe Recycling in the Universe(?) Thanks to the MMO! For more information, or an on-line version of this talk, visit: cfawww.harvard.edu/~agoodma n
