Joint IAS Princeton University Astrophysics Colloquium

Nov
21
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Subaru Hyper Suprime-Cam Year 3 Cosmology results: S8 tension?
Masahiro Takada
10:30am|Wolfensohn Hall

We used more than 25 million galaxies in the Subaru Hyper Suprime-Cam (HSC) shear catalog in the redshift range up to z~1.5 to measure weak lensing distortion effects due to large-scale structures. We used the measured weak lensing signals to...

Nov
14
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

How much (robust) cosmological information can we obtain from galaxy clustering?
Fabian Schmidt
10:30am|Wolfensohn Hall

All large-scale structure cosmologists are faced with the question: how do we robustly extract cosmological information, such as on dark energy, gravity, and inflation, from observed tracers such as galaxies whose astrophysics is extremely complex...

Oct
31
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Baryon Acoustic Oscillations with Galaxy Surveys: Present State and Some Future Prospects
Nikhil Padmanabhan
10:30am|Wolfensohn Hall

I will weave three separate threads. The first will be to describe recent and ongoing results from the Dark Energy Spectroscopic Survey. I will present the BAO results from the early DESI data, and some of the preparatory work for the Year 1 data. I...

Oct
10
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

The Dynamical Evolution of Exoplanet Systems Over Billions of Years
Kevin Schlaufman
10:30am|Wolfensohn Hall

Exoplanet systems are expected to evolve with time as they age. In most cases though, the dynamical evolution of exoplanet systems over billion-year timescales are hard to observe. I'll describe how Galactic kinematics can provide accurate and...

Oct
03
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Spinning into darkness: the slowing bar and Galactic structure
Ralph Schönrich
10:30am|Wolfensohn Hall

In the inner Milky Way stars trek together in a bar-shaped, rotating overdensity: the central bar, which dominates the inner disc out half-way to the Sun. The rotation velocity/pattern speed of this bar has been intensely debated. The best insight...

Sep
26
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Multi-messenger observations of cosmic collisions and explosions: progenitors, relativistic ejecta, and remnants
Alessandra Corsi
10:30am|Wolfensohn Hall

The births and mergers of neutron stars and black holes, the most exotic objects in the universe, can launch the fastest cosmic jets (gamma-ray bursts; GRBs) and shake the very fabric of space-time with gravitational waves. GW170817, the merger of...

Sep
19
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Pulsar Timing Arrays: A New Window on the Gravitational Wave Universe
Maura McLaughlin
10:30am|Wolfensohn Hall

Millisecond pulsars are rapidly rotating neutron stars with phenomenal rotational stability. Pulsar timing arrays world-wide monitor over 100 of these cosmic clocks in order to search for perturbations due to gravitational waves at nanohertz...

Sep
12
2023

Institute for Advanced Study / Princeton University Joint Astrophysics Colloquium

Cosmology and Fundamental Physics from Stellar Mass Binary Black Holes
Will Farr
10:30am|Wolfensohn Hall

The first three observing runs of the LIGO, Virgo, and KAGRA gravitational wave detectors produced a wealth of "firsts," including the first observation of multiple "ringdown" modes from a black hole---the remnant of the first-ever binary black hole...