Astrophysics

X-ray emission from star-forming galaxies, consisting primarily of emission from accreting black holes and neutron stars (i.e., X-ray binaries) and the hot interstellar medium, is a key tracer of processes like the physics of accretion onto compact...

Abstract: A variety of astrophysical phenomena can only be explained as being powered by black holes. In particular, accreting supermassive black holes are responsible for launching relativistic plasma jets and for accelerating ultra-energetic...

Abstract: Pulsar radio emission may be generated in pair discharges which fill the pulsar magnetosphere with plasma as an accelerating electric field is screened by freshly created pairs. In this talk we present a simplified analytic theory for the...

The intensity mapping (IM) technique has been devised as a powerful tool to investigate the large scale structure and galaxies, alternative and complementary to the more traditional means relying on galaxy detection. In the high-redshift universe...

Uncovering the physics of galaxy evolution has been a longstanding problem for astronomers.  Physical galaxy properties like the star formation rate, stellar mass, and metallicity can tell us not only how these properties change over generations of...

During its first eight orbits around the Sun, Parker Solar Probe (PSP) crossed the large-scale Heliospheric Current Sheet (HCS) multiple times and provided unprecedented detailed plasma and field observations of the near-Sun HCS. We report the...

Abstract: Motivated by the study of small amplitudes non-linear waves in the Anti-de-Sitter spacetime and in particular the conjectured existence of periodic in time solutions to the Einstein equations, we construct families of arbitrary small time...

Tidal capture of a white dwarf (WD) by a stellar-mass compact object occurs due to close encounters (with periastron separation of a few WD radii) in dense stellar clusters as well as in triple systems. We consider the subsequent evolution of the...