11 papers
Dynamics and geometry of the inner sub-parsec-scale jet in 3C 279 observed with the Event Horizon Telescope
Hendrik Mueller, Sebastiano D. von Fellenberg, Ai-Ling Zeng +275
The 2021 Event Horizon Telescope observations resolve the innermost jet region of the blazar 3C279 with unprecedented detail. The reconstructed images consistently reveal a compact…
From Morphology to Variability: Radiative Cooling Effects on Horizon-Scale Polarization in Two-Temperature GRMHD Simulations
Jane SiNan Long, Akhil Uniyal, Mingyuan Zhang +4
Polarization signatures provide a new window to investigate the effects of radiative cooling in the horizon-scale accretion flows. Morphology and variability of polarization offer…
Identifying highly magnetized white dwarfs: A dimensionality reduction framework for estimating magnetic fields
Surajit Kalita, Akhil Uniyal, Tomasz Bulik +1
Magnetic fields play a crucial role in compact object physics, particularly in white dwarfs (WDs), where high densities can sustain strong magnetic fields. Observations have reveal…
The Fate of Transonic Shocks around Black Holes and their Future Astrophysical Implications
Indu K. Dihingia, Akhil Uniyal, Yosuke Mizuno
Theoretical models have long predicted the existence of shocks in multi-transonic accretion flows onto a black hole, yet their fate under realistic general relativistic simulations…
High-Order Photon Rings around Kerr Naked Singularities
Hina Suzuki, Yosuke Mizuno, Akhil Uniyal +3
We present a detailed study of higher-order photon rings of an accreting Kerr naked singularity (KNS) with dimensionless spin parameter ; i.e., a horizonless, overly spinni…
Revealing Limitation in the Standard Cosmological Model: A Redshift-Dependent Hubble Constant from Fast Radio Bursts
Surajit Kalita, Akhil Uniyal, Tomasz Bulik +1
A major issue in contemporary cosmology is the persistent discrepancy, known as the Hubble tension, between the Hubble constant () estimates from local measurements and those…