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- W4385015221 abstract "We present the Lyman-$a$ (Lya) Luminosity Function (LF) at $2.05<z<3.75$, estimated from a sample of 67 Lya-emitter (LAE) candidates in the J-PAS Pathfinder surveys: miniJPAS and J-NEP. These two surveys cover a total effective area of $sim 1.14$ deg$^2$ with 54 Narrow Band (NB) filters across the optical range, with typical limiting magnitudes of $sim 23$. This set of NBs allows to probe Lya emission in a wide and continuous range of redshifts. We develop a method for detecting Lya emission for the estimation of the Lya LF using the whole J-PAS filter set. We test this method by applying it to the miniJPAS and J-NEP data. In order to compute the corrections needed to estimate the Lya LF and to test the performance of the candidates selection method, we build mock catalogs. These include representative populations of Lya Emitters at $1.9<z<4.5$ as well as their expected contaminants, namely low-$z$ galaxies and $z<2$ QSOs. We show that our method is able to provide the Lya LF at the intermediate-bright range of luminosity ($rm 10^{43.5} erg,s^{-1} lesssim L_{Lya} lesssim 10^{44.5} erg,s^{-1}$). The photometric information provided by these surveys suggests that our samples are dominated by bright, Lya-emitting Active Galactic Nuclei. At $L_{{rm Ly}a}<10^{44.5}$ erg,s$^{-1}$, we fit our Lya LF to a power-law with slope $A=0.70pm0.25$. We also fit a Schechter function to our data, obtaining: Log$(Phi^* / text{Mpc$^{-3}$})=-6.30^{+0.48}_{-0.70}$, Log$(L^*/ rm erg,s^{-1})=44.85^{+0.50}_{-0.32}$, $a=-1.65^{+0.29}_{-0.27}$. Overall, our results confirm the presence of an AGN component at the bright-end of the Lya LF. In particular, we find no significant contribution of star-forming LAEs to the Lya LF at Log$(L_{rm Lya}$ / erg s$^{-1}$)>43.5. This work serves as a proof-of-concept for the results that can be obtained with the upcoming data releases of the J-PAS survey." @default.
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- W4385015221 date "2023-07-14" @default.
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- W4385015221 title "The miniJPAS & J-NEP surveys: Identification and characterization of the Ly$alpha$ Emitter population and the Ly$alpha$ Luminosity Function" @default.
- W4385015221 doi "https://doi.org/10.48550/arxiv.2307.10215" @default.
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