We review the use of emission lines for understanding galaxy evolution, focusing on
excitation source, metallicity, ionization parameter, ISM pressure, and electron density. We …

The evolution of the content of heavy elements in galaxies, the relative chemical
abundances, their spatial distribution, and how these scale with various galactic properties …

We present emission-line ratios from a sample of 27 Lyman-break galaxies from z∼ 5.5− 9.5
with− 17.0< M 1500<− 20.4, measured from ultra-deep JWST/NIRSpec multi-object …

Inference of the physical properties of stellar populations from observed photometry and
spectroscopy is a key goal in the study of galaxy evolution. In recent years, the quality and …

Most of the hydrogen in the intergalactic medium (IGM) was rapidly ionized at high redshifts.
While observations have established that reionization occurred, observational constraints on …

We study the ionizing photon production efficiency at the end of the Epoch of Reionization
(z∼ 5.4− 6.6) for a sample of 30 Ly α emitters. This is a crucial quantity to infer the ionizing …

Active galactic nuclei (AGN) are energetic astrophysical sources powered by accretion onto
supermassive black holes in galaxies, and present unique observational signatures that …

The precise localization of the repeating fast radio burst (FRB 121102) has provided the first
unambiguous association (chance coincidence probability p≲ 3× 10− 4) of an FRB with an …

We present an overview of a new integral field spectroscopic survey called MaNGA
(Mapping Nearby Galaxies at Apache Point Observatory), one of three core programs in the …

We present the first sample of tidal disruption events (TDEs) discovered during the SRG all-
sky survey. These 13 events were selected among X-ray transients detected in the 0°< l< …