9 papers
Understanding constraints on primordial mass black holes made of dark matter using fast radio bursts
Surajit Kalita, Shruti Bhatporia, Amanda Weltman
In recent decades, a multitude of modified gravity theories have been proposed to address a variety of cosmological and astrophysical problems. While many of these theories remain…
Binary White Dwarfs as Gravitational Wave Sources for LISA
Sreeta Roy, Surajit Kalita, Tomasz Bulik +1
Gravitational waves (GWs) have proven to be a powerful probe of compact binary populations. In the millihertz frequency range accessible to Laser Interferometer Space Antenna LISA,…
Population synthesis of double white dwarfs: evolutionary effects on system properties
Sreeta Roy, Surajit Kalita
Double white dwarf (DWD) binaries are natural outcomes of binary stellar evolution and key sources for future space-based gravitational wave (GW) observatories such as Laser Interf…
Testing the cosmic distance-duality relation with localized fast radio bursts: a cosmological model-independent study
Jéferson A. S. Fortunato, Surajit Kalita, Amanda Weltman
We test the Etherington cosmic distance-duality relation (CDDR), by comparing Type Ia supernova (SNIa) luminosity-distance information from the Pantheon+ compilation with an angula…
A MeerKAT search for persistent radio sources towards twenty-five localised Fast Radio Bursts
Lebogang L. Mfulwane, James O. Chibueze, Thulo P. Letsele +17
The discovery of persistent radio sources (PRSs) associated with repeating fast radio bursts (FRBs) has shed light on the immediate environments and possible progenitors of these F…
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…