Recent uncalibrated supernova measurements from Pantheon+, DES
Y5, and Union3 tend to prefer high values of the fractional matter
density, Omega_m, relative to CMB + BAO data or even Pantheon
supernova constraints. This preference has important...
I will present a combination of three observational
techniques—astrometry, radial velocity, and direct imaging—to
discover, weigh, and characterize massive exoplanets and brown
dwarfs. Only a few exoplanets have both measured masses (from
radial...
Abstract: We present a wholly self-consistent,
complete cyclic bouncing cosmology based on components drawn from
string theory and constructed in a way that is under perturbative
control throughout (e.g., with temperatures well below the
string...
Hot Jupiters can form through high-eccentricity tidal migration,
where primordial Jovian planets are driven to near-unity
eccentricities and then tidally circularized into short-period
orbits. This pathway is well-studied in three-body systems...
Abstract: On September 14th 2015, the LIGO
detectors opened a new window onto the universe with the first
direct detection of gravitational waves from a binary black hole
merger. This first event alone had profound implications for tests
of general...
I will provide an overview of the recent final data release of
the ESO Kilo-Degree Survey and the associated cosmology results
using weak gravitational lensing. As the field transitions to the
next generation of surveys with Euclid and Rubin, I will...
Massive black holes (MBHs) are found in galaxies across a wide
mass range and play a central role in regulating gas cooling and
star formation through active galactic nucleus (AGN) feedback.
Cosmological simulations—where MBHs and galaxies co-evolve...
