Combining constraints from microlensing and Lyman-α forest, we provide a simple argument
to show that large spatial clustering of stellar-mass primordial black holes at the time of …

While large numbers of supermassive black holes have been detected at z> 6, their origin is
still essentially unclear. Numerical simulations have shown that the conditions for the …

X-shaped radio galaxies (XRGs) produce misaligned X-shaped jet pairs and make up≲ 10%
of radio galaxies. XRGs are thought to emerge in galaxies featuring a binary supermassive …

Primordial black hole (PBH) dark matter (DM) nonlinear small-scale structure formation
begins before the epoch of recombination, due to large Poisson density fluctuations. Those …

Approximately 200 supermassive black holes (SMBHs) have been discovered within the
first∼ gigayear after the Big Bang. One pathway for the formation of SMBHs is through the …

By means of grid-based, 3D hydrodynamical simulations we study the formation of second-
generation (SG) stars in a young globular cluster (GC) of mass 107 M⊙, the possible …

More than 200 supermassive black holes (SMBHs) of masses have been discovered at z≳
6. One promising pathway for the formation of SMBHs is through the collapse of …

Binary stars are common. While only those with small separations may exchange gas with
one another, even the widest binaries interact with their gaseous surroundings. Drag forces …

By performing three-dimensional radiation hydrodynamics simulations, we study Bondi–
Hoyle–Lyttleton accretion on to intermediate-mass black holes (BHs) wandering in the dusty …

Stellar-mass black holes can become embedded within the disks of active galactic nuclei
(AGNs). Afterwards, their interactions are mediated by their gaseous surroundings. Here, we …