New Results on Galaxy Evolution from the James Webb Space Telescope

Dear Colleagues,

The James Webb Space Telescope (JWST) is a space telescope primarily designed to conduct infrared astronomy. The JWST was launched on 25 December 2021 on an ESA Ariane 5 rocket from Kourou. With greatly improved infrared resolution and sensitivity, it will view objects too distant and faint for its predecessor, the Hubble Space Telescope. The main scientific instruments of the JWST are as follows: 1) a Near-Infrared Camera (NIRCam), 2) a Near-Infrared Spectrograph (NIRSpec), and 3) a Mid-Infrared Instrument (MIRI). The Near Infrared Camera (NIRCam) will cover the infrared wavelength range from 0.6 to 5 microns and will detect light from and generate images of the earliest stars and galaxies in the process of formation. NIRSpec's multiplexing ability and high sensitivity will enable spectroscopic observations of thousands of galaxies throughout a wide redshift range (typically 2-8), shedding new light on key physics of galaxy assembly and evolution, such as accretion onto supermassive black holes and the generation of galactic winds and outflows from young stars. MIRI is optimized to detect the Hα emission line for sources at redshifts beyond 6.7 and will contribute to our knowledge of how re-ionization occurred in the early Universe. The articles in this collection will showcase the capabilities of the three JWST instruments for deepening our understanding of how galaxies and their supermassive black holes form and evolve through cosmic time.

Prof. Dr. Guinevere Kauffmann
Collection Editor

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