Constraints on the First Stars From Lyman-alpha Emission Surveys

Details Constraints on the First Stars From Lyman-alpha Emission Surveys Constraints on the First Stars From Lyman-alpha Emission Surveys

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.3411m&link_type=abstract

American Astronomical Society Meeting 204, #34.11; Bulletin of the American Astronomical Society, Vol. 36, p.704

Astronomy and Astrophysics

Astronomy

Scientific paper

The Lyman-alpha emitters discovered at z=3-6.6 show one of the properties predicted for the first generation of stars: namely large equivalent width of the Lyman-alpha line. The second prediction, that of a Helium line at 1640 angstrom is not yet fulfilled. Both these predictions arise from having unusually hot stars due to metal-free population, or a top-heavy IMF, or both. Either the Lyman-alpha emitters are not forming their first generation of stars or the pop-III models need to be constrained to produce fainter He line. Mid-IR observations of Lyman-alpha emitters can reveal if there was a previous generation of stars and potentially resolve this issue.

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