The vast majority of known exoplanet systems are billions of
years old. Over these long lifetimes, chaotic gravitational
interactions among the planets can lead to violent collisions and
restructurings of their orbits. Indeed, the observed sample...
Although today’s nuclear arsenals are not much in the news, they
pose enormous risks for all humanity. Moreover, many treaties that
have reduced the threat of nuclear weapons are now being abandoned,
and enormous resources are scheduled to be spent...
The outer layers of molecular clouds are submitted to the
ambient radiation field and the presence of charged species favours
their coupling to the ambient magnetic field. In particular,
charged dust grains may affect the turbulent state and the...
Since the earliest days of astronomy, scientists have explored
the Universe through visible wavelengths, and we've gained enormous
insights through this window into space. But much of the Universe
is dim or invisible at these wavelengths, so to form...
Astronomy has a noteworthy position in garnering interest among
STEM majors and non-science majors alike, providing rich
opportunities for investigating students’ beliefs and
understanding. In this talk I will describe current progress in
two...
GW170817 heralded the opening of multimessenger astronomy. To
predict or interpret gravitational wave sources, numerical
modeling, in particular, numerical relativity is a unique and
viable tool. In this talk, I will present the current status
of...
The AdS instability conjecture provides an example of weak
turbulence appearing in the dynamics of the Einstein equations in
the presence of a negative cosmological constant. The conjecture
claims the existence of arbitrarily small perturbations to...
Abstract 1: The axion, motivated as a solution to the strong CP
problem, is also a viable dark matter candidate. If the initial
axion field is not homogenized by inflation, it can naturally
imprint large isocurvature fluctuations at extremely small...
