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Are the Lyman alpha forest "clouds" expanding pancakes?

Accepted version
Peer-reviewed

Type

Conference Object

Change log

Authors

Haehnelt, Martin G 

Abstract

The large sizes of Lyman alpha ``clouds'' inferred from coincident absorption in the spectrum of close quasar pairs suggests that these are transient flattened structures of small overdensity. It is argued that the observed absorbers should be preferentially located in underdense regions of the universe and should typically expand faster than the Hubble flow.

Description

Keywords

astro-ph, astro-ph

Journal Title

Astrophysics and Space Science Library

Conference Name

Cold Gas at High Redshift,

Journal ISSN

0067-0057

Volume Title

Publisher

Springer Netherlands