Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-02T19:27:26.455Z Has data issue: false hasContentIssue false
  • English
  • Français

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]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

Nagao, T., Taniguchi, Y., Kashikawa, N., et al. 2004, ApJ (Letters), 613, L9CrossRefGoogle Scholar
Nagao, T., Kashikawa, N., Malkan, M. A., et al. 2005, ApJ, 634, 142Google Scholar
Nagao, T., Murayama, T., Maiolino, R., et al. 2007, A&A, 468, 877Google Scholar
Schaerer, D. 2002, A&A, 382, 28Google Scholar
Schaerer, D. 2003, A&A, 397, 527Google Scholar