ReveaLLAGN 1: JWST Emission-line Spectra Reveal Low-luminosity Active Galactic Nucleus with Ultraviolet-deficient Spectral Energy Distributions and Warm Molecular Gas
We present near- and mid-infrared spectra of eight low-luminosity active galactic nuclei (LLAGN), spanning nearly 4 orders of magnitude in black hole mass and Eddington ratio, obtained with JWST/NIRSpec and MIRI as part of the ReveaLLAGN program, along with identical archival data of Cen A. The high spatial resolution of JWST cleanly separates
Euclid preparation: LXXVII. The NISP spectroscopy channel: Ground performance and calibration
ESA's Euclid cosmology mission relies on the very sensitive and accurately calibrated spectroscopy channel of the Near-Infrared Spectrometer and Photometer (NISP). With three operational grisms in two wavelength intervals, NISP provides diffraction-limited slitless spectroscopy over a field of 0.57 deg 2. A blue grism, BG E, covers the wavelength
A self-consistent direct method for chemical abundances in high-z galaxies with JWST
The unprecedented rest-frame UV and optical coverage provided by James Webb Space Telescope (JWST) enables simultaneous constraints on the electron density ( $n_{\rm e}$) and temperature ( $T_{\rm e}$) of ionized gas in galaxies at $z\,\gt\,5$. We present a self-consistent direct method based on multiple O III] ( $\lambda \lambda$1661, 1666) and [O