Discovery of optical and infrared accretion disc wind signatures in the black hole candidate MAXI J1348-630
ASTRONOMY & ASTROPHYSICS 664 (2022) ARTN A100
VLBI observations of GRB 201015A, a relatively faint GRB with a hint of very high-energy gamma-ray emission
ASTRONOMY & ASTROPHYSICS 664 (2022) ARTN A36
A Late-time Radio Flare Following a Possible Transition in Accretion State in the Tidal Disruption Event AT 2019azh
ASTROPHYSICAL JOURNAL 933:2 (2022) ARTN 176
Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds.
Nature astronomy 6:7 (2022) 828-836
Abstract:The radio-emitting neutron star population encompasses objects with spin periods ranging from milliseconds to tens of seconds. As they age and spin more slowly, their radio emission is expected to cease. We present the discovery of an ultra-long period radio-emitting neutron star, PSR J0901-4046, with spin properties distinct from the known spin and magnetic-decay powered neutron stars. With a spin-period of 75.88 s, a characteristic age of 5.3 Myr, and a narrow pulse duty-cycle, it is uncertain how radio emission is generated and challenges our current understanding of how these systems evolve. The radio emission has unique spectro-temporal properties such as quasi-periodicity and partial nulling that provide important clues to the emission mechanism. Detecting similar sources is observationally challenging, which implies a larger undetected population. Our discovery establishes the existence of ultra-long period neutron stars, suggesting a possible connection to the evolution of highly magnetized neutron stars, ultra-long period magnetars, and fast radio bursts.
The science case and challenges of space-borne sub-millimeter interferometry
ACTA ASTRONAUTICA 196 (2022) 314-333