Cosmological parameters |
| |
Authors: | D Narasimha |
| |
Institution: | (1) Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Mumbai, India |
| |
Abstract: | There is some consensus emerging on the values of the basic parameters of classical cosmology. The baryon number density estimated
from the light element abundance or X-ray gas in galaxy clusters tends towards 5% of closure density; the dark matter content
based on a number of independent methods appears to be somewhat less than half the closure density; Hubble constant obtained
from local measurements, gravitational lens or Sunyaev Zeldovich method are all probably centred around 60 km/sec/Mpc and
the age of the Universe is generally agree to be around 14 Gyr — all specified with bearable error bars. The supernova projects
and CMBR anisotropy together favour a finite cosmological constant, and gravitational lens statistics support the same conclusion. |
| |
Keywords: | Cosmology Hubble constant cosmological constant critical density |
本文献已被 SpringerLink 等数据库收录! |
|