An Intermediate-Band Imaging Survey for High-Redshift Lyman Alpha Emitters: The Mahoroba-11

We present results of our intermediate-band optical imaging survey forhigh-$z$ Ly$\alpha$ emitters (LAEs) using the prime focus camera, Suprime-Cam,on the 8.2m Subaru Telescope. In our survey, we use eleven filters; fourbroad-band filters ($B$, $R_{\rm c}$, $i^\prime$, and $z^\prime$) and sevenintermediate-band filters covering from 500 nm to 720 nm; we call this imagingprogram as the Mahoroba-11. The seven intermediate-band filters are selectedfrom the IA filter series that is the Suprime-Cam intermediate-band filtersystem whose spectral resolution is $R = 23$. Our survey has been made in a$34^\prime \times 27^\prime$ sky area in the Subaru XMM Newton Deep Surveyfield. We have found 409 IA-excess objects that provide us a large photometricsample of strong emission-line objects. Applying the photometric redshiftmethod to this sample, we obtained a new sample of 198 LAE candidates at $3 < z< 5$. We found that there is no evidence for evolution of the number densityand the star formation rate density for LAEs with $\log L({\rm Ly}\alpha) ({\rmerg s^{-1}}) > 42.67$ between $z \sim 3$ and 5.Comment: 46 pages, 15 figures, PASJ, Vol.57, No.6, in pres