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An observational pursuit for Pop III stars in a Lyα emitter at z>6 through He II emission

Published online by Cambridge University Press:  01 August 2006

Tohru Nagao
Tohru Nagao*
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan email: [email protected]
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Abstract

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We report our on-going observational project to search for population III (Pop III) stars in high-z galaxies. We searched Lyα emitters (LAEs) with a large equivalent width (EW), by our new selection technique ‘NB921-depressed i′-dropout selection’. We found eight photometric candidates and spectroscopically identified five LAEs with EW0(Lyα) > 100 Å. We then carried out a very deep near-infrared spectroscopy for a LAE among the above five, to search for the redshifted He iiλ1640 emission from Pop III stars in the galaxy, but obtained only an upper limit.

Keywords

early Universegalaxies: evolutiongalaxies: starburststars: early
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 255
Copyright
Copyright © International Astronomical Union 2007

References

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