JWST NIRCam narrow band survey of H? emitters at z~6.2
Yanu Khusanova (MPIA, Heidelberg)
Tuesday 25/06/2024 @ 14:00, Sala Antonio Sollima (IV piano Battiferro)
JWST opened a window to star formation rate (SFR) tracers previously not accessible to observations at high redshift, such as H? emission line. Before JWST, H? emission line was observed only up to redshift 2.5. JWST allowed for the first time observe H? emission in galaxies at redshifts above 6. Although H? emission line flux can be measured using follow-up spectroscopy, an alternative approach – narrow band imaging makes it possible to blindly search for H? emitters in a small redshift range and simultaneously obtain accurate line flux measurements. In this talk, I will present a sample of 51 H? emitting galaxies at z~6.2 found in the Cosmic Evolution Early Release Science Survey (CEERS) field using NIRCam imaging in narrow band F470N. I will discuss their spatial distribution, SFR distribution and spectroscopic observations of the two brightest sources showing signs of AGN.