Confirmation of the Friedmann-Lemaǐtre universe by the distribution of the larger absorbing clouds

✍ Scribed by J. Hoell; D.-E. Liebscher; W. Priester

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 534 KB
• Volume: 315
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.2103150202

✦ Synopsis

A new theoretical approach is applied to the cloud model as an explanation for the Lyman a forest. It is based on the complete Friedmann equations including a A-term. In the data sets of Lu et al. 1991 and Roser 1993 the lines are constrained by a lower limit (0.36 A, 0.32 k ) of the intrinsic equivalent width. This makes them suitable for a cloud model analysis, supplementing the bubble wall models which also make use of the weaker lines. Both data sets can be represented satisfactorily by a Friedmann-Lernaitre model with XO = 1.08 f 0.02 and RO = 0.014 f 0.006, although the regression formulae differ by an essential factor depending on the redshift. The age of the universe according to this model is 2.8.H:'. It is not necessary to invoke any evolutionary effects in the number densities and in the physical parameters of the clouds.