Non-Voigt Lyman-alpha absorption line profiles

Details Non-Voigt Lyman-alpha absorption line profiles Non-Voigt Lyman-alpha absorption line profiles

1999-12-06

arxiv.org/abs/astro-ph/9912091v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJL. 10 pages, 3 figures

Scientific paper

10.1086/312468

Recent numerical simulations have lead to a paradigm shift in our understanding of the intergalactic medium, and the loss of a physical justification for Voigt profile fitting of the Lyman-alpha forest. Many individual lines seen in simulated spectra have significant departures from the Voigt profile, yet could be well fitted by a blend of two or more such lines. We discuss the expected effect on the line profiles due to ongoing gravitational structure formation and Hubble expansion. We develop a method to detect departures from Voigt profiles of the absorption lines in a statistical way and apply this method to simulated Lyman-alpha forest spectra, confirming that the profiles seen do statistically differ from Voigt profiles.

Affiliated with

Also associated with

No associations

Rating

Non-Voigt Lyman-alpha absorption line profiles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-Voigt Lyman-alpha absorption line profiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-Voigt Lyman-alpha absorption line profiles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-573418