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2011•Astronomy and AstrophysicsOpen access

Evolution of the observed Lyαluminosity function fromz= 6.5 toz= 7.7: evidence for the epoch of reionization?

B. Clément, Jean-Gabriel Cuby, F. Courbin, A. Fontana, W. Freudling, J. P. U. Fynbo, J. Gallego, P. Hibon, Jean‐Paul Kneib, O. Le Fèvre, C. Lidman, R. G. McMahon, B. Milvang‐Jensen, P. Møller, A. F. M. Moorwood, K. Nilsson, L. Pentericci, Bram Venemans, V. Villar, J. P. Willis

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Abstract

Aims. Lyα emitters (LAEs) can be detected out to very high redshifts during the epoch of reionization. The evolution of the LAE luminosity function with redshift is a direct probe of the Lyα transmission of the intergalactic medium (IGM), and therefore of the IGM neutral-hydrogen fraction. Measuring the Lyα luminosity function (LF) of Lyα emitters at redshift z = 7.7 therefore allows us to constrain the ionizing state of the Universe at this redshift.

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What this paper is about

Aims. Lyα emitters (LAEs) can be detected out to very high redshifts during the epoch of reionization. The evolution of the LAE luminosity function with redshift is a direct probe of the Lyα transmission of the intergalactic medium (IGM), and therefore of the IGM neutral-hydrogen fraction. Measuring the Lyα luminosity function (LF) of Lyα emitters at redshift z = 7.7 therefore allows us to constrain the ionizing state of the Universe at this redshift.

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Available abstract

Aims. Lyα emitters (LAEs) can be detected out to very high redshifts during the epoch of reionization. The evolution of the LAE luminosity function with redshift is a direct probe of the Lyα transmission of the intergalactic medium (IGM), and therefore of the IGM neutral-hydrogen fraction. Measuring the Lyα luminosity function (LF) of Lyα emitters at redshift z = 7.7 therefore allows us to constrain the ionizing state of the Universe at this redshift.

Key concepts: Reionization, Redshift, Physics, Astrophysics, Luminosity function, Dark Ages, Intergalactic medium, Luminosity

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Evolution of the observed Lyαluminosity function fromz= 6.5 toz= 7.7: evidence for the epoch of reionization? — Research Paper | ScholarLens