Talk Title and Abstract:
Acceleration
on
cosmological
and
galactic
scales
Large
sky
surveys
use
the
Baryon
Acoustic
Oscillation
feature
in
the
distribution
of
galaxies
and
gas
today
as
a
standard
rod
with
which
to
constrain
the
expansion/acceleration
history
of
the
universe.
Some
standardization
of
the
rod
is
necessary
to
deliver
accurate
percent
level
constraints
on
the
expansion
history,
and
I
will
describe
a
novel
method
-
Laguerre
reconstruction
(Nikakhtar,
Sheth
&
Zehavi)
-
for
attempting
this.
If
time
permits,
I
will
then
describe
the
results
of
a
study
of
acceleration
on
smaller
scales.
The
Radial
Acceleration
Relation
is
a
correlation
between
the
total
acceleration
observed
around
a
galaxy
and
that
due
to
its
baryons.
Its
shape
and
tightness
have
both
been
used
to
motivate
alternatives
to
General
Relativity.
I
will
discuss
how
it
emerges
in
LCDM
models
(Paranjape
&
Sheth).
Would you like to join this Zoom seminar? Please email Donna Hayes.