Probing dark matter, galaxies and the expansion history of the Universe with Lyα in absorption and emission
✍ Scribed by M.G. Haehnelt
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 855 KB
- Volume
- 331
- Category
- Article
- ISSN
- 0004-6337
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Ly__α__ radiation is an important diagnostic tool in a wide range of astrophysical environments. I will first describe here how measurements of the matter power spectrum on small scales from Ly__α__ forest data constrain the mass of dark matter particles. I then will report on an ambitious program of searching for very faint spatially extended Ly__α__ emission at z ∼ 3 which has led to the discovery of a new population of faint Ly__α__ emitters which I will argue should be identified with the long searched for host galaxies of damped Ly__α__ absorbers. Finally, I will discuss the possibility of measuring the redshift drift of Ly__α__ absorption features and therefore the change of the expansion rate of the Universe in real time with the ultra‐stable high‐resolution spectrograph CODEX proposed for the E‐ELT (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)