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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