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No Need for MACHOS in the Halo
Evalyn I. Gates, Geza Gyuk, Gilbert P. Holder +1
A simple interpretation of the more than dozen microlensing events seen in the direction of the LMC is a halo population of MACHOs which accounts for about half of the mass of the…
The LMC Microlensing Events: Evidence for a Warped and Flaring Milky Way Disk?
N. W. Evans, G. Gyuk, M. S. Turner +1
The simplest interpretation of the microlensing events towards the Large Magellanic Cloud detected by the MACHO and EROS collaborations is that about one third of the halo of our o…
Expectations for the Difference Between Local and Global Measurements of the Hubble Constant
Xiangdong Shi, Michael S. Turner
There are irreducible differences between the Hubble constant measured locally and the global value. They are due to density perturbations and finite sample volume (cosmic variance…
Big-bang Nucleosynthesis Enters the Precision Era
David N. Schramm, Michael S. Turner
The last parameter of big-bang nucleosynthesis, the baryon density, is being pinned down by measurements of the deuterium abundance in high-redshift hydrogen clouds. When it is det…
Pre-Big-Bang Inflation Requires Fine Tuning
Michael S. Turner, Erick J. Weinberg
The pre-big-bang cosmology inspired by superstring theories has been suggested as an alternative to slow-roll inflation. We analyze, in both the Jordan and Einstein frames, the eff…
Ribbons on the CBR Sky: A Powerful Test of a Baryon Symmetric Universe
William H. Kinney, Edward W. Kolb, Michael S. Turner
If the Universe consists of domains of matter and antimatter, annihilations at domain interfaces leave a distinctive imprint on the Cosmic Background Radiation (CBR) sky. The signa…
Microlensing and the Composition of the Galactic Halo
Evalyn Gates, Geza Gyuk, Michael S. Turner
By means of extensive galactic modeling we study the implications of the more than 100 microlensing events that have now been observed for the composition of the dark halo of the G…
Ten Things Everyone Should Know About Inflation
Michael S. Turner
These lecture notes are organized into ten lessons that summarize the status of inflationary cosmology.
Cosmology 1996
Michael S. Turner
The current state of cosmology is easy to summarize: a very successful standard model -- the hot big-bang cosmology -- that accounts for the evolution of the Universe from 10^{-2}…
Cosmology: Standard and Inflationary
Michael S. Turner
In these lectures I review the standard hot big-bang cosmology, emphasizing its successes, its shortcomings, and its major challenges-developing a detailed understanding of the for…
The Cosmology of Nothing
Michael S. Turner
For more seventy years physicists have appreciated that Nature's vacuum is far from empty. The discovery of the Lamb shift in Hydrogen provided dramatic verification of the reality…
Inflation: From Theory to Observation and Back
Michael S. Turner
Alan Guth introduced cosmologists to inflation at the 1980 Texas Symposium. Since, inflation has had almost as much impact on cosmology as the big-bang model itself. However, unlik…
Cosmology: From Hubble to HST
Michael S. Turner
The Hubble constant sets the size and age of the Universe, and, together with independent determinations of the age, provides a consistency check of the standard cosmology. The Hub…
The Case for LambdaCDM
Michael S. Turner
The case is simple: there is no compelling theoretical argument against a cosmological constant and LambdaCDM is the only CDM model that is consistent with all present observations…
Deuteronomy and Numbers
David N. Schramm, Michael S. Turner
Four light isotopes - D, ^3He, ^4He and ^7Li - were produced by nuclear reactions a few seconds after the big bang. New measurements of ^3He in the ISM by Gloeckler and Geiss and o…
Effect of Finite Mass on Primordial Nucleosynthesis
Robert E. Lopez, Michael S. Turner, Geza Gyuk
We have calculated the small effect of finite nucleon mass on the weak-interaction rates that interconvert protons and neutrons in the early Universe. We have modified the standard…
CDM Models with a Smooth Component
Michael Turner, Martin White
The inflationary prediction of a flat Universe is at odds with current determinations of the matter density (Omega_M~0.2-0.4). This dilemma can be resolved if a smooth component co…