@Article{SpinosoOLBVISGHEVOMMVAAC:2020:UnBrEn,
               author = "Spinoso, D. and Orsi, A. and L{\'o}pez-Sanjuan, C. and Bonoli, S. 
                         and Viironen, K. and Izquierdo-Villalba, D. and Sobral, D. and 
                         Gurung-L{\'o}pez, S. and Hern{\'a}n-Caballero, A. and 
                         Ederoclite, A. and Varela, J. and Overzier, R. and 
                         Miralda-Escud{\'e}, J. and Muniesa, D. J. and V{\'{\i}}lchez, 
                         J. M. and Alcaniz, Janilson Souza de and Angulo, R. E. and 
                         Cenarro, A. J.",
          affiliation = "{Centro de Estudios de F{\'{\i}}sica Del Cosmos de Arag{\'o}n} 
                         and {Centro de Estudios de F{\'{\i}}sica Del Cosmos de 
                         Arag{\'o}n} and {Centro de Estudios de F{\'{\i}}sica Del Cosmos 
                         de Arag{\'o}n} and {Donostia International Physics Center} and 
                         {Centro de Estudios de F{\'{\i}}sica Del Cosmos de Arag{\'o}n} 
                         and {Centro de Estudios de F{\'{\i}}sica Del Cosmos de 
                         Arag{\'o}n} and {Centro de Estudios de F{\'{\i}}sica Del Cosmos 
                         de Arag{\'o}n} and {Centro de Estudios de F{\'{\i}}sica Del 
                         Cosmos de Arag{\'o}n} and {Centro de Estudios de F{\'{\i}}sica 
                         Del Cosmos de Arag{\'o}n} and {Universidade de S{\~a}o Paulo 
                         (USP)} and {Centro de Estudios de F{\'{\i}}sica Del Cosmos de 
                         Arag{\'o}n} and {Observat{\'o}rio Nacional (ON)} and 
                         {Universitat de Barcelona} and {Centro de Estudios de 
                         F{\'{\i}}sica Del Cosmos de Arag{\'o}n} and {Instituto de 
                         Astrof{\'{\i}}sica de Andaluc{\'{\i}}a} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Donostia 
                         International Physics Center} and {Centro de Estudios de 
                         F{\'{\i}}sica Del Cosmos de Arag{\'o}n}",
                title = "J-PLUS: Unveiling the brightest end of the Ly \α luminosity 
                         function at 2.0 < z < 3.3 over 1000 deg2",
              journal = "Astronomy \& Astrophysics",
                 year = "2020",
               volume = "643",
                pages = "A149",
                month = "Nov.",
             abstract = "We present the photometric determination of the bright end of the 
                         Ly\α luminosity function (LF; at LLy\α1043.3 erg s-1) 
                         within four redshift windows (\Δ z < 0.16) 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 deg2, with 
                         limiting magnitude r \∼ 22. The analysis of high-z 
                         Ly\α-emitting sources over such a wide area is unprecedented 
                         and allows us to select approximately 14 500 hyper-bright 
                         (LLy\α > 1043.3 erg s-1) Ly\α-emitting candidates. We 
                         test our selection with two spectroscopic programs at the GTC 
                         telescope, which confirm \∼89% of the targets as 
                         line-emitting sources, with \∼64% being genuine z \∼ 
                         2.2 quasars (QSOs). We extend the 2.2 z 3.3 Ly\α LF for the 
                         first time above LLy\α \∼ 1044 erg s-1 and down to 
                         densities of \∼10-8 Mpc-3. Our results unveil the Schechter 
                         exponential decay of the brightest-end of the Ly\α LF in 
                         great detail, complementing the power-law component of previous 
                         determinations at 43.3 Log10(LLy\α/erg s-1) 44. We measure 
                         \φ\∗ = (3.33 ± 0.19)×10-6, Log(L\∗) = 44.65 ± 
                         0.65, and \α = -1.35 ± 0.84 as an average over the probed 
                         redshifts. These values are significantly different from the 
                         typical Schechter parameters measured for the Ly\α LF of 
                         high-z star-forming Lyman-\α emitters (LAEs). This implies 
                         that z > 2 AGNs/QSOs (likely dominant in our samples) are 
                         described by a structurally different LF from that used to 
                         describe z > 2 star-forming LAEs, namely LQSOs\∗ \∼ 
                         100LLAEs\∗ and \φQSOs\∗ \∼ 10-3 
                         \φLAEs\∗, with the transition between the two LFs 
                         happening at LLy\α \∼ 1043.5 erg s-1. This supports 
                         the scenario in which Ly\α-emitting AGNs/QSOs are the most 
                         abundant class of z 2 Ly\α emitters at LLy\α 1043.3 
                         erg s-1. Finally, we suggest that a significant number of these z 
                         2 AGNs/QSOs (\∼60% of our samples) are currently 
                         misclassified as stars based on their broad-band colours, but are 
                         identified for the first time as high-z line-emitters by our 
                         narrow-band-based selection.",
                  doi = "10.1051/0004-6361/202038756",
                  url = "http://dx.doi.org/10.1051/0004-6361/202038756",
                 issn = "0004-6361 and 1432-0746",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}