Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1279..179n&link_type=abstract
DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 179-186 (2010).
Physics
Galaxies, Redshift, Population Iii Stars, Origin, Formation, Evolution, Age, And Star Formation, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Population Iii Stars
Scientific paper
We report our photometric search for high-redshift galaxies hosting Population III (Pop III) stars based on deep imaging data obtained in the Subaru Deep Field. By combining the data obtained with broad-band, narrow-band, and intermediate-band filters, we searched for galaxies emitting strong Lyα and HeIIλ 1640 emission lines (``dual emitters''), that are promising candidates for galaxies hosting Pop III stars. We found no convincing candidates for such primeval galaxies with SFRPopIII>=2 Msolar yr-1 in a volume of 4×105 Mpc3 at z~4. This result disfavors low-feedback models for Pop III star clusters proposed so far. Our result gives the first observational upper limit on the Pop III SFR density of SFRDPopIII<5×10-6 Msolar yr-1 Mpc-3. This new selection method to search for galaxies hosting Pop III stars should be useful in near-future narrow-band surveys with the next-generation wide-field observational facilities such as Hyper Suprime-Cam on the Subaru telescope, that enables us to identify Pop III stars in high-redshift galaxies.
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