PHYS 005 Lecture Notes - Lecture 23: Ekpyrotic Universe, Isotropy, Antiproton
5 Jul 2018
School
Department
Course
Professor
6/04 Annihilation, Inflation, Dark Ages, First Stars, and Cosmic Membranes
Matter and Anti-Matter
Supersymmetry
●For every proton, there is a negative proton & etc for neutron, electron
●Protons & neutrons can be subdivided into quarks
○Quarks coalesce into protons & neutrons- when ANNIHILATION starts
■Protons find antiproton
■Electrons find positron
●Energy is created
●*for every billionth particle, one particle that is left over -> how WE ARE FORMED
○No idea why there is a +1
Cosmic Inflation
●Once electrons combine w neutrons-light is free to travel & fill universe
○Cools down-creates radiation that permeates universe
■Redshifted wavelengths-microwave
●Why the universe is the SAME TEMPERATURE (CMB IS SAME TEMPERATURE)
○*only instance where light travelled FASTER than itself- inflationary epoch
●First cosmic light horizon
○Everything outside edge of observable universe has THE SAME LAW OF PHYSICS
●Explains why universe is
○Flat
○Homogenous
○Isotropy
The Dark Ages
●Atoms don’t create light
○Universe falls into dark age waiting for first stars to form
■Light not dense enough to create visible light for 200 million years (after
recombination)
●Clouds that start collapsing form new stars-> light reenters
○The first galaxies
First Stars and Galaxies
●Light w a lot of energy-blue/ ultraviolet lights
○Pop 3 stars find cold hydrogen
○Atom becomes ionized-electron gets charged up & leave the electron
■Ionized atom- total charge diff fr 0
■New stars ionize atoms around them
○When matter stars falling into filaments
■Dark matter encompasses regular matter
Document Summary
6/04 annihilation, inflation, dark ages, first stars, and cosmic membranes. For every proton, there is a negative proton & etc for neutron, electron. Protons & neutrons can be subdivided into quarks. Quarks coalesce into protons & neutrons- when annihilation starts. *for every billionth particle, one particle that is left over -> how we are formed. No idea why there is a +1. Once electrons combine w neutrons-light is free to travel & fill universe. Why the universe is the same temperature (cmb is same temperature) *only instance where light travelled faster than itself- inflationary epoch. Everything outside edge of observable universe has the same law of physics. Universe falls into dark age waiting for first stars to form. Light not dense enough to create visible light for 200 million years (after recombination) Clouds that start collapsing form new stars-> light reenters. Light w a lot of energy-blue/ ultraviolet lights. Atom becomes ionized-electron gets charged up & leave the electron.
