The miniJPAS Survey: Detection of Double-core Lyα Morphology of Two high-redshift QSOs

P. T. Rahna, Zhen-Ya Zheng, Ana L. Chies-Santos, Zheng Cai, Daniele Spinoso, Isabel Marquez, Roderik Overzier, L. Raul Abramo, Silvia Bonoli, Carolina Kehrig, L. A. Diaz-Garcia, Mirjana Povic, Roberto Soria, Jose M. Diego, Tom Broadhurst, Rosa M. Gonzalez Delgado, Jailson Alcaniz, Narciso Benitez, A. Javier Cenarro, David Cristobal-Hornillos, Renato A. Dupke, Alessandro Ederoclite, Antonio Hernan-Caballero, Carlos Lopez-Sanjuan, Antonio Marin-Franch, Claudia Mendes de Oliveira, Mariano Moles, Laerte Sodre Jr., Keith Taylor, Jesus Varela, Hector Vazquez Ramio, JPAS team

Submitted on 1 July 2022


The Lyα emission is an important tracer of neutral gas in a circum-galactic medium (CGM) around high redshift QSOs. The origin of Lyα emission around QSOs is still under debate which has significant implications for galaxy formation and evolution. In this paper, we report the detection of double-core morphology in the Lyα images of two high redshift QSOs, SDSS J141935.58+525710.7 at z=3.128 (hereafter QSO1) and SDSS J141813.40+525240.4 at z=3.287 (hereafter QSO2), with the contiguous narrow-band (NB) images from the miniJPAS survey in the AEGIS field. The separations of the two Lyα cores are 8.7 kpc (1.15") and 9.9 kpc (1.32") with Lyα line luminosities of 3×1044 erg s1 and 6×1044 erg s1 for QSO1 and QSO2, respectively. Both QSOs also show extended morphology in their CIV and HeII (only in QSO1), covering the miniJPAS NB images. The Lyα luminosity-size relation shows that both QSOs are suspected to be Enormous Lyman alpha Nebula (ELAN) due to their high Lyα line luminosity. Current miniJPAS NB emission-line morphology and SDSS spectral line profiles indicate the galactic outflow as the powering mechanism for extended Lyα emission via resonant scattering and/or photoionization and/or shocks. Considering the relative shallow exposures of miniJPAS, the objects found here could be the tip of the iceberg of a promising number of such objects that will be uncovered in the upcoming full J-PAS survey, and deep IFU observations with 8-10m telescopes will be essential to constrain the underlying physical mechanism that responsible for the double-cored morphology.


Comment: Three figures and two tables (Submitted to ApJL)

Subjects: Astrophysics - Astrophysics of Galaxies; Astrophysics - Cosmology and Nongalactic Astrophysics