Modelling Ly$\alpha$ emitters in a hierarchical Universe: a hybrid approach

Orsi, A.; Lacey, C.G.; Baugh, C.M.

Abstract

We present the results of combining the GALFORM semi-analytical model of galaxy formation with a Monte Carlo Lyα radiative transfer code to study the properties of Lyα emitters between 0 < z < 7. In this hybrid approach, Lyα photons escape from galaxies in galactic outflows. The model results are consistent with a set of key observations, such as the inferred Lyα escape fraction and, remarkably, with the shape of the Lyα line from composite spectra. The predicted fractions of Lyα emitters in Lyman-break galaxy samples at high redshift are in partial agreement with observations, and suggest that the intergalactic medium may not play a dominant role in attenuating the Lyα line at z ˜ 6 - 7.

Citation

Orsi, A., Lacey, C., & Baugh, C. (2013, December). Modelling Ly$\alpha$ emitters in a hierarchical Universe: a hybrid approach. Presented at Second Workshop on Numerical and Observational Astrophysics: From the First Structures to the Universe Today, Buenos Aires

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Second Workshop on Numerical and Observational Astrophysics: From the First Structures to the Universe Today
• Online Publication Date: Jun 6, 2013
• Publication Date: 2013
• Deposit Date: May 16, 2014
• Volume: 4
• Pages: 100-103
• Series Title: Asociación Argentina de Astronomía Book Series
• Book Title: Proceedings of the Second Workshop on Numerical and Observational Astrophysics: From the First Structures to the Universe Today, held 14-18 November, 2011 at the Institute for Astronomy and Space Physics (IAFE), Ciudad Autónoma de Buenos Aires, Argentina
• Public URL: https://durham-repository.worktribe.com/output/1154685
• Publisher URL: http://www.astronomiaargentina.org.ar/uploads/docs/aaabs4.pdf
• Related Public URLs: http://adsabs.harvard.edu/abs/2013AAABS...4..100O