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Galaxies as a cosmological test
P. J. E. Peebles
The relativistic LambdaCDM cosmological model has passed a demanding network of tests that convincingly demonstrate it is a useful approximation to what happened back to high redsh…
Massive Coronae of Galaxies
Masataka Fukugita, P. J. E. Peebles
There is reason to suspect that about half of the baryons are in pressure-supported plasma in the halos of normal galaxies, drawn in by gravity along with about half of the dark ma…
Structure Formation With a Long-Range Scalar Dark Matter Interaction
Adi Nusser, S. S. Gubser, P. J. E. Peebles
Numerical simulations show that a long-range scalar interaction in a single species of massive dark matter particles causes voids between the concentrations of large galaxies to be…
Testing General Relativity on the Scales of Cosmology
P. J. E. Peebles
The cosmological tests are tight enough now to show that the Friedmann-Lemaitre Lambda CDM cosmological model almost certainly is a useful approximation. This means general relativ…
Interacting Dark Matter and Dark Energy
Glennys R. Farrar, P. J. E. Peebles
We discuss models for the cosmological dark sector in which the energy density of a scalar field approximates Einstein's cosmological constant and the scalar field value determines…
Nineteenth and Twentieth Century Clouds Over the Twenty-First Century Virtual Observatory
P. J. E. Peebles
Physical science has changed in the century since Lord Kelvin's celebrated essay on Nineteenth Century Clouds over the Dynamical Theory of Heat and Light, but some things are the s…
From Precision Cosmology to Accurate Cosmology
P. J. E. Peebles
This is the dawning of the age of precision cosmology, when all the important parameters will be established to one significant figure or better, within the cosmological model. In…
The Cosmological Constant and Dark Energy
P. J. E. Peebles, Bharat Ratra
Physics invites the idea that space contains energy whose gravitational effect approximates that of Einstein's cosmological constant, Lambda; nowadays the concept is termed dark en…
When did the Large Elliptical Galaxies Form?
P. J. E. Peebles
The simple reading of the evidence is that the large elliptical galaxies existed at about the present star mass and comoving number density at redshift z=2. This is subject to the…
The Galaxy and Mass N-Point Correlation Functions: a Blast from the Past
P. J. E. Peebles
Correlation functions and related statistics have been favorite measures of the distributions of extragalactic objects ever since people started analyzing the clustering of the gal…
The Cosmological Tests
P. J. E. Peebles
Recent observational advances have considerably improved the cosmological tests, adding to the lines of evidence, and showing that some issues under discussion just a few years ago…
The Void Phenomenon
P. J. E. Peebles
Advances in theoretical ideas on how galaxies formed have not been strongly influenced by the advances in observations of what might be in the voids between the concentrations of o…
Concluding Remarks on New Cosmological Data and the Values of the Fundamental Parameters
P. J. E. Peebles
I review the reason for considering the prime purpose of the program of measurements of the fundamental parameters of cosmology to be the tests of cosmological models. I comment on…
Radial and Transverse Velocities of Nearby Galaxies
P. J. E. Peebles, S. D. Phelps, Edward. J. Shaya +1
Analysis of the peculiar velocities of galaxies should take account of the uncertainties in both redshifts and distances. We show how this can be done by a numerical application of…
Delayed Recombination
P. J. E. Peebles, Sara Seager, Wayne Hu
Under the standard model for recombination of the primeval plasma, and the cold dark matter model for structure formation, recent measurements of the first peak in the angular powe…
Fluid Dark Matter
P. J. E. Peebles
Dark matter modeled as a classical scalar field that interacts only with gravity and with itself by a potential that is close to quartic at large field values and approaches a quad…
Dynamics of a Dark Matter Field with a Quartic Self-Interaction Potential
P. J. E. Peebles
It may prove useful in cosmology to understand the behavior of the energy distribution in a scalar field that interacts only with gravity and with itself by a pure quartic potentia…
Summary: Comments on the State of our Subject
P. J. E. Peebles
This conference shows the impressive rate of advances in the observations and theoretical interpretations of large-scale structure. But to explain my feeling that we may still have…
A Model for Structure Formation Seeded by Gravitationally Produced Matter
Wayne Hu, P. J. E. Peebles
This model assumes the baryons, radiation, three families of massless neutrinos, and cold dark matter were mutually thermalized before the baryon number was fixed, primeval curvatu…
A Galaxy X-ray Fundamental Plane?
M. Fukugita, P. J. E. Peebles
We suggest the radii and luminosities of the X-ray emitting halos of elliptical galaxies define a fundamental plane with the star velocity dispersions, as for the corresponding opt…
Summary; Inflation and Traditions of Research
P. J. E. Peebles
One way to judge the impact of the inflation concept is to consider where cosmology might be today without it. The Einstein-de Sitter model would not have been so keenly defended,…
Noninteracting dark matter
P. J. E. Peebles, A. Vilenkin
Since an acceptable dark matter candidate may interact only weakly with ordinary matter and radiation, it is of interest to consider the limiting case where the dark matter interac…
Quintessential inflation
P. J. E. Peebles, A. Vilenkin
We present an explicit observationally acceptable model for evolution from inflation to the present epoch under the assumption that the entropy and matter of the familiar universe…
Is Cosmology Solved?
P. J. E. Peebles
We have fossil evidence from the thermal background radiation that our universe expanded from a considerably hotter denser state. We have a well defined and testable description of…