J-PLUS: Unveiling the brightest-end of the Lyα luminosity function at 2.0<z<3.3 over 1000 deg2

Spinoso, Daniele and Orsi, Alvaro and López-Sanjuan, Carlos and Bonoli, Silvia and Viironen, Kerttu and Izquierdo-Villalba, David and Sobral, David and Gurung-López, Siddhartha and Hernán-Caballero, Antonio and Ederoclite, Alessandro and Varela, Jesús and Overzier, Roderik and Miralda-Escudé, Jordi and Muniesa, David J. and Alcaniz, Jailson and Angulo, Raul E. and Cenarro, A. Javier and Cristóbal-Hornillos, David and Dupke, Renato A. and Hernández-Monteagudo, Carlos and Marín-Franch, Antonio and Moles, Mariano and Jr, Laerte Sodré and Vázquez-Ramió, Héctor (2020) J-PLUS: Unveiling the brightest-end of the Lyα luminosity function at 2.0<z<3.3 over 1000 deg2. Astronomy and Astrophysics. ISSN 1432-0746 (In Press)

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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 2.210^43.3 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. We extend the 2.22 AGN/QSOs (likely dominant in our samples) are described by a structurally different LF than z>2 star-forming LAEs, namely with L^*_QSOs ~ 100 L^*_LAEs and Phi^*_QSOs ~ 10^-3 Phi^*_LAEs. Finally, our method identifies very efficiently as high-z line-emitters sources without previous spectroscopic confirmation, currently classified as stars (~2000 objects in each redshift bin, on average). Assuming a large predominance of Lya-emitting AGN/QSOs in our samples, this supports the scenario by which these are the most abundant class of z>2 Lya emitters at L_Lya>10^43.3 erg/s.

Item Type:
Journal Article
Journal or Publication Title:
Astronomy and Astrophysics
Additional Information:
27 pages (6 in appendix), 21 figures (5 in appendix), submitted to A&A
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Deposited On:
09 Sep 2020 14:35
In Press
Last Modified:
23 Sep 2020 06:11