Sonoma State University |
Astronomy 350 J.S. Tenn |

Inflationary models (1979-81)

The present (2003-04)
Today cosmologists try to determine not only *k*, Ω_{m}, and Ω_{Λ}, but also the age of the universe and the portions of Ω_{m} due to various types of matter, such as baryonic matter, cold dark matter, and hot dark matter. They also would like an independent determination of the age of the Universe and the time that elapsed between the Big Bang and “recombination,” when atoms formed and the Universe became transparent. Amazingly, analysis of the anisotropies in the CMB, provides values for all of these and more.

Max Tegmark, et al (67 authors) attempt to determine all of the cosmological parameters based on analysis of results of*WMAP,* the Sloan Digital Sky Survey, and other data in a really, really difficult paper last revised in early 2004. If you can read this, you are far above Astronomy 350! There is a simplified summary on the SDSS website.

Note: There is nothing at all critical about the “critical density” if the cosmological constant is not zero, but the term is still used.**Cosmological Parameters: 1 2 3 4**

Max Tegmark, et al (67 authors) attempt to determine all of the cosmological parameters based on analysis of results of

Note: There is nothing at all critical about the “critical density” if the cosmological constant is not zero, but the term is still used.

Please send comments, additions, corrections, and questions to joe.tenn@sonoma.edu |
JST 2006-01-29 |