Explore the mysteries of dark matter in this comprehensive lecture from the Physics of the Early Universe program. Delve into empirical knowledge about dark matter, its thermal history, and constraints from Big Bang nucleosynthesis. Examine the effects of dark matter on cosmology, including small-scale clustering and the Lyman-alpha forest. Investigate the behavior of perturbations in the pre-recombination fluid and the interactions of dark matter in the early universe. Learn about constraints on dark matter constituent mass, considering both bosonic and fermionic possibilities. Discover approaches to understanding the vast range of dark matter possibilities, including thermal production mechanisms. Gain insights into cutting-edge research on dark matter's role in the formation and evolution of the universe.
Dark Matter: Properties and Behavior in the Early Universe - Lecture 1
International Centre for Theoretical Sciences via YouTube
Overview
Syllabus
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LECTURES ON DARK MATTER LECTURE
WHAT DO WE ACTUALLY EMPIRICALLY KNOW ABOUT DARK MATTER?
WE KNOW HOW MUCH REGULAR MATTER THERE IS RELATIVE TO PHOTONS
BIG BANG NUCLEOSYNTHESIS BBN TELLS US HOW MUCH ORDINARY MATTER THERE IS RELATIVE TO RADIATION
RECOMBINATION AND BARYON-TO-PHOTON RATIO
Surface of last scattering recombination Too hot for atoms
BARYON-TO-PHOTON RATIO VS. MATTER-RADIATION EQUALITY
UPSHOT: A NON-BARYONIC COMPONENT OF MATTER WAS PRESENT IN THE EARLY UNIVERSE. ... WHAT WAS IT DOING?
WHAT IS THE DARK MATTER THERMAL HISTORY?
BBN CONSTRAINTS ON N AND DARK MATTER THERMAL HISTORY
THERMAL HISTORY FROM SMALL DARK MATTER HALOS
DARK MATTER DECOUPLING WHILE RELATIVISTIC
THERMAL HISTORY EFFECTS ON COSMOLOGY
A PROBE OF SMALL-SCALE CLUSTERING: LY-A FOREST
FINDING NEW DWARF GALAXIES
UNDERSTANDING GALAXY-HALO CONNECTION EMPIRICALLY
OTHER PROBES OF SMALL-SCALE DARK MATTER SUB-HALOS
UPSHOT: ALL OBSERVATIONS SO FAR ARE CONSISTENT WITH COLD DARK MATTER
BEHAVIOUR OF PERTURBATIONS IN PRE-RECOMBINATION FLUID
DARK MATTER DECOUPLING WHILE RELATIVISTIC
DOES THE DARK MATTER INTERACT MUCH IN THE EARLY UNIVERSE?
FLUCTUATIONS IN THE PLASMA
THE CMB AND DARK MATTER-BARYON DRAG
TESTING DARK MATTER BARYON SCATTERING WITH SMALL-SCALE DARK MATTER
BEHAVIOUR OF PERTURBATIONS IN PRE-RECOMBINATION FLUID
UPSHOT: DARK MATTER IS NOT INTERACTING VERY MUCH IN EARLY UNIVERSE
RECAP OF DARK MATTER REQUIREMENTS SO FAR
CONSTRAINTS ON THE DARK MATTER CONSTITUENT MASS
LIGHTEST KNOWN DARK MATTER-DOMINATED SYSTEMS CAN'T BE A FRACTION, OF A DARK MATTER "PARTICLE"
IF DARK MATTER IS A BOSON. .. EXHIBITS MACROSCOPIC WAVE BEHAVE
IF DARK MATTER IS A FERMION. .. PAULI EXCLUSION
DARK MATTER MASS
HOW TO APPROACH THIS HUGE SPACE OF POSSIBILITIES?
THERMAL DARK MATTER PRODUCTION
FLUCTUATIONS IN THE PLASMA
BEHAVIOUR OF PERTURBATIONS IN PRE-RECOMBINATION FLUID
Q&A
Taught by
International Centre for Theoretical Sciences
