This is a talk given at lunch time, usually in the conference room at noon.
Understanding quenching mechanisms in high redshift quiescent galaxies is essential to solve the quenching puzzle.
I will describe two separate methods to statistically infer the properties of dark matter substructure using, in turn, (astrometric) weak and strong gravitational lensing observations.
Last year, for the first time, the IAU Transient Name Server surpassed 20,000 astronomical transient reports.
Stellar streams, the tidal remnants of accreted globular clusters and dwarf galaxies, are uniquely powerful tools for studying the Milky Way.
Large reservoirs of cold (~ 10^4 K) gas exist out to and beyond the virial radius in the circumgalactic medium (CGM) of all types of galaxies.
The gaseous interfaces between galactic disks and the circumgalactic medium are critical boundaries in the baryon cycle. These interfaces are imprinted with structural, chemical, and kinematic clues about the processes driving galaxy growth and evolution across cosmic time.
Unbiased all-sky surveys such as the Zwicky Transient Facility (ZTF) or the Pan-STARRS Survey for Transients (PSST) have opened up the door for the discovery of new and exciting types of transients.
Far-infrared (FIR) and submillimeter (submm) lines emitted from the interstellar medium (ISM) not only reflect the ISM physical properties that are correlated with the star formation (SF) process, but also trace the underlying density distribution and promise cosmological studies.
The mechanism powering core-collapse supernovae remains uncertain. I will discuss aspects of the critical condition for explosion, focusing on the model problem of spherical accretion onto a standing accretion shock.