"Comparing star formation in TNG50 (SH03) with the Pressure-Regulated, Feedback-Modulated (PRFM) Equilibrium Model"
Traditional star formation sub-grid models, such as the Springel and Hernquist (2003, SH03), implemented on cosmological galaxy formation simulations, usually employ phenomenological adjustable parameters to reproduce certain key observables such as the Kennicutt-Schmidt empirical relation. Calibrated to a suite of multiphase magnetohydrodynamic simulations run with the TIGRESS computational framework, Ostriker and Kim (2022) have recently presented the...
Andrea Dupree, "Globular Clusters ... the mystery continues!"
Wladimir Lyra, "Evolution of Arrokoth from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular dragvolution of Arrokoth from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag"
Yvette Cendes, "New Discoveries in Late-Time Emission from Tidal Disruption Events"
Charles Steinhardt, ”Is the Stellar Initial Mass...
"Dynamical Instabilities in the Aid of Planet Formation in Circumstellar Disks"
Abstract: During the first million years of evolution, nascent planetary systems are embedded in dense disk-shaped clouds of gas. These circumstellar disks are home to a myriad of hydrodynamical processes, which bring about turbulence and the emergence of viscous-like behavior, enabling accretion of gas onto the protostar. Meanwhile, micron-sized dust grains embedded in the disk are growing through coagulation onto pebbles and rocks. Turbulence has a positive effect on these small solids,...
"Some recent results in gravitational-wave science"
The era of gravitational-wave astrophysics and cosmology has begun. We'll discuss some recent results, focusing on constraints that come from the population of gravitational-wave events. Topics will include the lower (between neutron stars and black holes) and the upper (due to pair-instability supernovae) mass gaps, standard siren cosmology, and recent events including GW190814 (with a secondary object that might be a neutron star or a black hole; we're not sure which) and GW190521 (with two black holes potentially in...
"New test of the black hole metric with EHT images of Sgr A*"
Our understanding of astrophysical black holes is predicated on the assumption that they are well described by the Kerr solution to Einstein’s equations. A promising avenue for testing the Kerr hypothesis is to detect the shadow a black hole casts on the surrounding emission and compare its size and shape to the predictions of the Kerr metric. New horizon-scale images of the Galactic Center black hole Sagittarius A* (Sgr A*) recently published by the Event Horizon Telescope (EHT) allow for new strong-field tests... Read more about ITC Colloquium - Lia Medeiros (IAS)
"The ASTRID simulation: the evolution of massive black holes"
The launch of the next-generation telescopes will soon revolutionize the study of the high-redshift universe and allow us to better understand the evolution of the first galaxies and supermassive black holes. Making full use of future observations will require a new generation of cosmological simulations with large volumes for statistical samples of large structures and with high resolution to model the galaxy formation. In this talk, I will introduce the ASTRID simulation, one of the...