A Subaru Search for Lyman$α$ Emitters at Redshift 5.7

Details A Subaru Search for Lyman$α$ Emitters at Redshift 5.7 A Subaru Search for Lyman$α$ Emitters at Redshift 5.7

2003-07-16

arxiv.org/abs/astro-ph/0307325v1

Astron.J.126:2091,2003

Astronomy and Astrophysics

Astrophysics

18 pages, 19 figures, accepted for AJ

Scientific paper

10.1086/378481

We present the results of a survey for Ly$\alpha$ emitters at $z\approx 5.7$ based on optical narrow-band ($\lambda_{\rm c} = 8150$ \AA ~ and $\Delta\lambda = 120$ \AA), and broad-band ($B$, $R_{\rm C}$, $I_{\rm C}$, and $z^\prime$) observations of the field surrounding the high redshift quasar, SDSSp J104433.04$-$012522.2, on the 8.2 m Subaru Telescope with the Subaru Prime Focus Camera, Suprime-Cam. This survey covers a sky area of $\approx 720$ arcmin$^2$ and a co-moving volume of $\simeq 2 \times 10^5 ~ h_{0.7}^{-3}$ Mpc$^3$. We have found 20 candidates of Ly$\alpha$ emitters at $z \approx$ 5.7 with $\Delta z \approx 0.1$. Two of them have been confirmed star-forming galaxies at $z=5.655$ and $z=5.687$ from our follow-up optical spectroscopy. We discuss star-formation properties of the 20 objects from a statistical point of view. Our survey leads to a new estimate of the star formation rate density at $z \approx 5.7$, $\sim 1.2 \times 10^{-3} h_{0.7} M_\odot$ yr$^{-1}$ Mpc$^{-3}$.

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