Open Questions: The Cosmological Constant
See also: Dark energy --
The vacuum --
Where can I find more information about cosmology and the
- Fairly short list, including some non-Web references, by
The Cosmological Constant Links
- Short list, mostly dealing with cosmology in general.
Sites with general resources
The Cosmological Constant
- A May 2000 NSF "Chautauqua" Course by
The site contains
course outline, many
references, and other related
The Cosmological Constant
- Good set of pages on the subject by
Has good links to
Surveys, overviews, tutorials
- Article from
The Cosmological Constant: Einstein's Fudge Factor
- 1991 article by Sten Odenwald from Sky and Telescope
What is a Cosmological Constant?
- Brief article from the
Microwave Anisotropy Probe site.
Living With Lambda
- 1998 expository paper by J. D. Cohn.
"A short pedagogical note about the consequences of a
nonzero cosmological constant in physical cosmology."
A New Cosmological Paradigm: the Cosmological Constant and Dark
- 1998 expository lecture by Lawrence M. Krauss.
Why the cosmological constant is small and positive
- May 2006 arXiv paper (astro-ph/0605173) by
Neil Turok, using their "cyclic" model of cosmology to
explain the small magnitude of Λ.
The Case for a Positive Cosmological Lambda-term
- Long technical 1999 paper presenting observational and
theoretical aspects of a small positive cosmological constant,
by Varin Sahni ahd Alexei Starobinsky.
- Accelerating the Cosmos
Astronomy, October 1999, pp. 44-51
- Observational efforts to measure the Hubble constant now
indicate that the speed of expansion of the universe is actually
increasing. If so, this implies there is a (non-zero) "cosmological
constant" in the equations of general relativity.
- The Mystery of the Cosmological Constant
Scientific American, May 1998, pp. 106-113
- The cosmological constant measures the energy content of the
vacuum. Theoretical estimates of the magnitude of the constant,
based on the conjectured physics of Higgs fields, are very far
in excess of possible values based on observation.
- Playing Cosmology's Wild Card
Astronomy, April 1997, pp. 57-59
- Cosmologists since Einstein have been loath to
include a non-zero cosmological constant in the equation of
general relativity. But such a constant would imply an increase
in the rate of the expansion of the universe, hence an older
age than allowed by a constant rate of expansion.
- Donald Goldsmith - Einstein's Greatest Blunder? The Cosmological
Constant and Other Fudge Factors in the Physics of the Universe
Harvard University Press, 1995
- Provides a non-technical description of the cosmological
constant and how it is involved in describing the structure and
evolution of the universe. Many topics in cosmology such as
the age of the universe, its average density and rate of expansion,
and dark matter are covered.
Copyright © 2002 by Charles Daney, All Rights Reserved