VizieR Online Data Catalog: X-ray and radio activity of Ly α emitters (Calhau+, 2020)

We use a large sample of LAEs selected over a redshift range of z~2-6 in the COSMOS field (SC4K; Sobral et al. 2018MNRAS.476.4725S, Cat. J/MNRAS/476/4725). SC4K also includes the CALYMHA COSMOS sample at z=2.2 (Sobral et al. 2017MNRAS.466.1242S, Cat. J/MNRAS/466/1242), with Hα coverage from HiZELS (Geach et al. 2008MNRAS.388.1473G; Sobral et al. 2013MNRAS.428.1128S, Cat. J/MNRAS/428/1128). The LAEs were detected using a compilation of 16 narrow and medium band (MB) data taken with the Subaru and the Isaac Newton Telescopes. Sources were selected as LAEs through a combination of photometric and spectroscopic redshifts as well as colour-colour diagnostics.

The Chandra COSMOS-Legacy survey (Elvis et al. 2009ApJS..184..158E, Cat. J/ApJS/184/158; Civano et al. 2016ApJ...819...62C, Cat. J/ApJ/819/62) covers the COSMOS field (e.g. Capak et al. 2007ApJS..172...99C, Cat. II/284; Scoville et al. 2007ApJS..172....1S) over a total area of 2.2deg². The deep X-ray data allow us to track X-ray emission from processes like bremsstrahlung and inverse Compton scattering, and thus to identify AGN X-ray emission.

The VLA-COSMOS Survey (Schinnerer et al. 2004AJ....128.1974S, Cat. J/AJ/128/1974, 2007ApJS..172...46S, Cat. J/ApJS/172/46; Bondi et al. 2008ApJ...681.1129B; Schinnerer et al. 2010ApJS..188..384S, Cat. J/ApJS/188/384) used the National Radio Astronomy Observatory's Very Large Array (VLA) to conduct deep, wide-field imaging with ~1.5arcsec resolution at 1.4GHz continuum of the 2deg² COSMOS field.

Usage of the 3GHz VLA data allows us to further probe the existence of radio-emitting AGNs over a larger area, as this survey covers the entirety of SC4K. In addition, by removing radio-detected AGNs and obtaining deep radio stacks, radio data will allow us a dust-independent determination of the SFRs of SC4K LAEs.

(3 data files).