As was realized by Bondi, Metzner, van der Burg, and Sachs
(BMS), the symmetry group of asymptotic infinity is not the
Poincaré group, but an infinite-dimensional group called the BMS
group. Because of this, understanding the BMS frame of the...
Abstract 1: Measurements of the Hubble constant (H0) as
determined via the Cepheid-supernovae distance ladder appear to
provide strong evidence for physics beyond LCDM. However, in the
Carnegie Chicago Hubble Program (CCHP), we used the Tip of
the...
Abstract 1: The electron heating physics in
collisionless shocks imprints upon micro-scale dissipation and
waves seen in situ by heliospheric spacecraft, as well as X-ray
emission from supernova remnants and galaxy clusters. How much do
electrons...
The Transiting Exoplanet Survey Satellite (TESS) is proceeding
with its mission of discovering transiting, small exoplanets hosted
by bright stars that are amenable to mass measurements, and hence,
bulk and atmospheric characterization. Accordingly...
The giant impact theory for the formation of the Moon suggests
that a planetary impactor struck the proto-Earth in an oblique
collision shortly after the formation of the solar system. This
collision produces liquid and vapor debris, drawn from the...
Local star formation thresholds proposed in the literature
typically refer to a gas density above which star formation occurs.
There has been plenty of debate regarding the existence of such a
threshold. I will discuss how we can search for a...
Cosmic rays, the relativistic component of diffuse astrophysical
plasma, exchange energy and momentum with the thermal gas
collisionlessly, mediated by the ambient magnetic field. Some but
not all models of this interaction show that cosmic rays can...
The interaction of charged particles with the local plasma
environment is of interest in a variety of space applications. This
talk will focus on two specific applications: 1. the design of new
technologies to detect orbital debris and 2. the...
