The Sloan Digital Sky Survey is a major project to image a quarter of
the sky in 5 optical bandpasses and then to extend that map into the
third dimension by taking one million spectra of galaxies.
We have recently found clear evidence for the acoustic signature
in the clustering of galaxies;
here is the clearinghouse web page
containing links to the paper as well as additional explanations
for both astronomers and others.
On older topics,
here is a page with some figures I've made.
Here are the spectra
from my paper on the average spectra of early-type galaxies.
Check out the SDSS Home Page.
The
AGN and Galaxy Evolution Survey (AGES)
is a wide-field redshift survey in the
NOAO Deep Wide-Field Survey (NDWFS)
Bootes field. This 9 square degree
field has superb multi-wavelength coverage from
Chandra,
GALEX,
NDWFS,
Spitzer,
and various radio observations. We are conducting extensive
spectroscopy over the full field using the new
Hectospec
instrument at the MMT,
with the goal of studying the evolution of AGN activity and the
properties of galaxies from low to intermediate redshifts.
(More)(Private).
Lloyd Knox, Asantha Cooray, Zoltan Haiman, and I studied how the
correlations in the far-infrared background could be used to study
the cosmic evolution and clustering bias of far-infrared-luminous galaxies.
Matias Zaldarriaga and I have developed new techniques for the
inference of spatial power spectra from angular clustering data
and applied the results to the APM survey.
Some of the numerical outputs are here.
Wayne Hu, Max Tegmark, and I have written a
set of papers
studying how well one can
estimate cosmological parameters from the combination of
CMB, large-scale structure, and supernova data sets.
Topics so far include the
mass of the neutrino,
the Hubble constant, and the
acceleration of the universe.
We have also taken a detailed look at the
effects of microwave foregrounds on cosmological forecasts.
Wayne Hu and I have written a
set of papers detailing the properties
of the matter power spectrum in variants of the
adiabatic cold dark matter model. We give both phenomenological
and quantitative accounts of the effects of adding
significant numbers of baryon and massive neutrinos to the usual
CDM paradigm. Fitting formulae and animations are available
here,
and a list of the papers is
here.
Cosmological collapse as applied to angular momentum acquisition,
early black hole formation, Lyman-alpha clouds, the scatter of
the Tully-Fisher relation. Mass estimates of filaments in redshift
surveys. Cosmological birefringence or lack thereof.
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THIS PAGE WAS LAST MODIFIED: 15 April 2001
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