Astrophysics Seminars

Sep
17
2020

Institute for Advanced Study Astrophysics Seminar

Turbulent power-law spectra in the universe
Siyao Xu
11:00am|Virtual Meeting

Turbulence is ubiquitous in astrophysical media and plays an essential role in a variety of fundamental astrophysical processes. The turbulent power-law spectra have been observed in the solar wind, the interstellar medium, the intracluster medium...

Sep
10
2020

Institute for Advanced Study Astrophysics Seminar

Physics and Astrophysics With Gravitational-Wave Observations of Black Hole Binaries
Emanuele Berti
11:00am|Virtual Meeting

The observation of compact binary mergers by the LIGO/Virgo collaboration marked the dawn of a new era in astronomy. LISA will expand this vision by opening a new observational window at low frequencies. The gravitational radiation emitted by...

Dec
12
2019

Institute for Advanced Study Informal Astrophysics Seminar

Probing Microphysics of the Hot Intracluster Medium
Irina Zhuravleva
11:00am|Bloomberg Hall, Astrophysics Library
Galaxy clusters are the largest dark matter-dominated objects in the Universe with the most massive baryonic component in the form of hot, X-ray-emitting plasma. Due to their size and relative simplicity, clusters are unique laboratories for probing...
Dec
05
2019

Institute for Advanced Study Informal Astrophysics Seminar

Studying the Magnetic Field of the Diffuse ISM in 3D
Gina Panopoulou
11:00am|Bloomberg Hall, Astrophysics Library
The ability to reconstruct the 3D magnetic field in the Galactic interstellar medium (ISM) is instrumental for many different scientific efforts. A 3D magnetic field reconstruction can inform us about the dynamics in star forming regions, the origin...
Nov
21
2019

Institute for Advanced Study Informal Astrophysics Seminar

Non-Gaussianity & the Spectral Tilt
Daniel Green
11:00am|Bloomberg Hall, Astrophysics Library
Cosmological observations have revealed a small but non-zero deviation for scale invariance but remain consistent with perfectly Gaussian initial conditions. I will discuss how non-Gaussianity is related to deviations from exact scale and conformal...
Nov
14
2019

Institute for Advanced Study Informal Astrophysics Seminar

Star Cluster Populations: The Link Between Star Formation and Galaxy Formation
Michael Fall
11:00am|Bloomberg Hall, Astrophysics Library
This talk presents a general picture of star cluster populations, from their formation in the clumpy ISM to their eventual dissolution in the smooth stellar field. The picture is general or unified in the sense that it encompasses most traditional...
Nov
07
2019

Institute for Advanced Study Informal Astrophysics Seminar

Addressing the Initial Patch Problem of Inflation
Leonardo Senatore
11:00am|Bloomberg Hall, Astrophysics Library
After reviewing the initial patch problem for inflation, I present numerical and analytical results that allow us to investigate arbitrarily inhomogenous spacetimes, and that show that this problem is non-existent: non-trivial mathematical reasons...
Oct
31
2019

Institute for Advanced Study Informal Astrophysics Seminar

Solar Interiors, Helioseismology and Neutrinos
Aldo Serenelli
11:00am|Bloomberg Hall, Astrophysics Library
For more than 20 years helioseismology, the study of solar oscillations, has provided an exquisite picture of the solar interior structure. However these oscillations, which are standing acoustic waves in the solar interior, have diminishing...
Oct
24
2019

Institute for Advanced Study Informal Astrophysics Seminar

Characterizing Star-Planet Systems with Precision Spectroscopy
Megan Bedell
11:00am|Bloomberg Hall, Astrophysics Library
More than two decades after the discovery of the first exoplanet with radial velocity (RV) measurements, vast quantities of data exist from dedicated planet-hunting spectrographs. These spectra play an important role not only in the discovery and...
Oct
17
2019

Institute for Advanced Study Informal Astrophysics Seminar

Mid-band Atomic Gravitational wave Interferometric Sensor (MAGIS)
Peter Graham
11:00am|Bloomberg Hall, Astrophysics Library
Gravitational waves provide a new window to the universe. Opening new bands in the gravitational spectrum is expected to yield a wealth of information. I will discuss a new experiment: the Mid-band Atomic Gravitational wave Interferometric Sensor...