The discovery of high-energy cosmic neutrinos opened a new
window of astroparticle physics. Their origin is a new mystery in
the field, which is tightly connected to the long-standing puzzle
about the origin of cosmic rays. I will discuss...
On August 17, 2017, LIGO/Virgo detected the first
gravitational waves from merging neutron stars. This event, known
as GW170817 was accompanied by observations all over the
electromagnetic spectrum. The peculiar gamma-ray burst that
followed the...
Current observations in black-hole astronomy could offer new
pathways to constrain deviations from General Relativity. This
includes tests of black-hole uniqueness, black-hole stability, and
corrections at strong curvature.
Super star clusters with masses > 1e6 Msun are thought to be
progenitors of globular clusters (GCs). Their births however are
seldomly seen in the local Universe. Given radiation and kinetic
feedbacks that regulate star formation, contribution to...
Misaligned disks in binaries were commonly thought to evolve to
a coplanar
state. However, recent theory and observations have surprisingly
shown that disks around
eccentric orbit binaries can evolve to a polar state in which the
disk is...
Galaxy clusters are the most massive gravitationally self-bound
objects in the Universe. These clusters form at the rare high peaks
of the primordial density fluctuations, and they subsequently trace
the growth of structure in the Universe as they...
Fast radio bursts (FRBs) are the brightest radio transients in
the universe. Since the unexpected discovery in the 21st century,
their extreme nature is one of the biggest mysteries of
astrophysics. FRBs are also unique probes of the universe...
One of the strongest predictions of the standard cold dark
matter paradigm is the hierarchy of structure down to Earth-mass
scales. However, individual self-bound clumps of dark
matter--"halos"--are difficult to detect directly. Instead,
we use...
Large-area surveys such as Gaia have given us an unprecedented
amount of data on stars in the Milky Way. One of the largest
ongoing challenges in understanding the present-day structure and
formation history of our Galaxy (i.e. Galactic archaeology)...
Astronomical observations indicate that coherent, dynamically
important magnetic fields are ubiquitous in the Universe. However,
neither the origin problem -- what are the physical mechanisms that
generate the initial ``seed'' magnetic fields —- nor...
