Astronomy 507
Lecture 14, Feb. 26
Spring 2020
Lecture Notes:
pdf file
Distance Measures
in a FLRW Universe
distance pre- and post-Einstein
luminosity distance
angular diameter distance
implications: CMB
flucutations
measure angular diameter distance to
(sound) horizon
to yield
cosmic geometry
Cosmic Acceleration and Dark Energy
Supernovae and Cosmology
thumbnail sketch of supernovae
taxonomy:
Type II, Ib/c: obseravation--
SN 1987A
; theory--
core collapse
Type Ia: observation--
SN 1994D
,
SN 2014J
in
M82
; SNIa light curve
movie
theory: thermonuclear disruption of white dwarf--
simulation
SN Ia digital discovery via subtraction, e.g.,
here
,
here
Supernova cosmology campaigns
Supernova Cosmology Project
High-
z
Supernova Search
Type Ia SNe as
Standardizable Candles
Examples: low-z
SN 1994D
, typical medium-
z
event
,
z
=1.7 discovery in the
Hubble Deep Field
light curves
raw and cooked
light curves
Lecture Archive