J-PLUS: Unveiling the brightest-end of the Ly{\alpha} luminosity function at 2.0<z<3.3 over 1000 deg^2

Understand

We present the photometric determination of the bright-end (L_Lya>10^43.5 erg/s) of the Lya luminosity function (LF) within four redshifts windows in the interval 2.2<z<3.3.

• Our work is based on the Javalambre Photometric Local Universe Survey (J-PLUS) first data-release, which provides multiple narrow-band measurements over ~1000 deg^2, with limiting magnitude r~22.
• The analysis of high-z Lya-emitting sources over such a wide area is unprecedented, and allows to select a total of ~14,500 hyper-bright (L_Lya>10^43.3 erg/s) Lya-emitting candidates.
• We test our selection with two spectroscopic follow-up programs at the GTC telescope, confirming ~89% of the targets as line-emitting sources, with ~64% being genuine z~2.2 QSOs.