Earth-based radar observations in 2006–2019 enable the
first measurement of the spin precession rate and moment of inertia
of Venus. The observations also show that the spin period of the
solid planet changes by tens of minutes. The length-of-day...
I will present the first results of the survey of all white
dwarfs (WD) that were observed in the Hobby-Eberly Telescope Dark
Energy Experiment (HETDEX) using the Visible Integral-field
Replicable Unit Spectrograph (VIRUS). The final outcome will
be...
A dark matter candidate lighter than about 30 eV exhibits wave
behavior in a typical galactic environment. Examples include the
QCD axion as well as other axion-like-particles. We review the
particle physics motivations, and discuss experimental and...
High-precision astrometric data from space observatories, such
as the Hubble Space Telescope (HST) and Gaia, are revolutionizing
our ability to study the Local Group. 6D phase space measurements
(3-dimensional position and velocity) now make it...
Recent observations of binary black hole and binary neutron star
mergers have ignited interest in the formation and evolution of
compact-object binary systems. However, by the time a
compact-object binary merges and produces gravitational-wave...
Neutron star merger GW 170817 was accompanied by a gamma-ray burst
with luminosity L?1047 erg/s, coming with a ~2 s delay after the
gravitational waves. Observations also indicate the presence of a
dark, ultra-relativistic envelope ejected promptly...
We have undertaken a novel census of red sources identified by
their rest-frame far infrared colors using Planck and Herschel
telescopes, and not by the Sunyaev-Z'eldovich effect (SZE). The
vast majority of sources are high-redshift galaxy...
I will discuss recent work that lays out two methods to obtain
direct measurements of the Galactic acceleration. First, I will
review our recent work in using high precision spectrographs to
measure the Galactic acceleration. These measurements can...
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...
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...
