Abstract
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 M⊙ 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 M⊙ 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
