Relativistic cosmic-rays created by stellar and black hole feedback may play an important role in many aspects of structure formation. Cosmic-rays can drive outflows from star forming galaxies and heat diffuse gas in the circumgalactic and intergalactic medium. In this talk I will describe some of the possible impacts of cosmic-rays on galaxy formation, observational probes of their impact, and the theoretical uncertainities in our understanding of the role of cosmic rays in structure...
"Microphysical Insights into Protoplanetary Disks and Exoplanet Atmospheres"
Abstract: A fundamental understanding of planetary histories and characteristics requires an empirical connection between planet formation and evolved planets—a long-sought goal of astrophysics. This connection is now increasingly possible due to simultaneous revolutions in the observations of protoplanetary disks and exoplanet atmospheres. A key step towards relating these observations of different evolutionary stages is to characterize the composition of material in protoplanetary disks and relate these... Read more about ITC Colloquium - Diana Powell (ITC)
"Interactions between black holes, stars, and galaxies"
A physical understanding of the high energy interactions between black holes and stars, coupled with the context of their galactic birthplaces, allows us to use these systems as tools to better understand black holes at all masses, the lives and deaths of stars, and the dynamical mechanisms operating in galaxies. In this talk, I will discuss one particular interaction: the tidal disruption of a star by a supermassive black hole. I will present a library of tidal disruption event simulations and will show that it can be reduced to... Read more about ITC Colloquium - Jamie Law-Smith (ITC)
"Promises and puzzles in binary evolution" Binary stars are foundational to modern astrophysics. They underpin precision measurements of stellar structure, age, and composition; they provide the most stringent tests of general relativity, they make possible the study of faint and rare objects such as black holes and neutron stars, and they are the progenitors of gravitational wave sources. The components of binaries often interact, dramatically changing their evolution and giving rise to a spectacular zoo of astrophysical phenomenology. Large-scale stellar surveys such as Gaia, TESS... Read more about ITC Colloquium - Kareem El-Badry (Harvard)
Connecting Cosmic Gas Flows and Metal Enrichment to Supermassive Black Hole Growth in Galactic Evolution"
In this talk, I will discuss the impact of supermassive black hole (SMBH) feedback on the gas phase evolution of Milky Way-mass (MW-mass) galaxies. Both my simulation suites were created with the N-body+Smoothed particle hydrodynamics code, ChaNGa, and include a...
"Centihertz gravitational-wave astronomy: from hierarchical black-hole triples to ultra-compact white-dwarf binaries"
Future space-borne gravitational-wave (GW) observatories are sensitive to a rich array of astrophysical systems in the centihertz band. Here we focus on two science cases specifically. The first is hierarchical black-hole (BH) triple systems in galactic nuclei. Such a system consists of a stellar-mass inner binary orbiting around a supermassive BH (SMBH). We show that the orbital angular momentum (AM) of the inner binary will precess around the outer orbital... Read more about ITC Colloquium - Hang Yu (Caltech)
Tracing Dynamical History of TESS Warm Jupiters"
Warm Jupiters are a key missing piece in our understanding of how planetary systems form and evolve. It is currently debated whether Warm Jupiters form in situ or undergo disk or high eccentricity tidal migration. Using the Transiting Exoplanet Survey Satellite (TESS), we discover and characterize Warm Jupiters to trace...
"Lyman-alpha emission and transmission during the Epoch of Reionization"
The visibility of high-redshift Lyman-alpha emitting galaxies (LAEs) provides important constraints on galaxy formation processes and the Epoch of Reionization (EoR). However, predicting realistic and representative statistics for comparison with observations represents a significant challenge in the...