299 citations · 468 across the 25 of their papers we have counts for
25 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…
Refining fundamental constants with white dwarfs: machine learning informed constraints on fine-structure constant and proton-to-electron mass ratio
Akhil Uniyal, Surajit Kalita, Yosuke Mizuno +2
We explore the potential variation of two fundamental constants, the fine-structure constant and the proton-to-electron mass ratio , within the framework of modified gravity…
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…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Fast Radio Bursts as probes of the late-time universe: a new insight on the Hubble tension
Surajit Kalita, Shruti Bhatporia, Amanda Weltman
Fast Radio Bursts (FRBs) are bright radio transient events, a subset of which have been localized to their host galaxies. Their high dispersion measures offer valuable insights int…
Novel understanding of Cosmological Phenomena using Fast Radio Bursts
Surajit Kalita, Shruti Bhatporia, Amanda Weltman
Fast radio bursts (FRBs) offer unique probes of diverse cosmological phenomena due to their characteristic properties, including short duration timescale and high dispersion measur…
Constraining Fundamental Constants with Fast Radio Bursts: Unveiling the Role of Energy Scale
Surajit Kalita
Understanding physical mechanisms relies on the accurate determination of fundamental constants, although inherent limitations in experimental techniques introduce uncertainties in…
Effects of modified gravity on microscopic properties and cooling timescale of white dwarfs
Aneta Wojnar, Surajit Kalita, Lupamudra Sarmah
There are currently two open questions in white dwarf physics: why are massive dwarfs observed less often in astronomical surveys, and why have not any super-Chandrasekhar white dw…
Effect of temperature on measurement of fundamental constants using white dwarfs in Gaia-EDR3 survey
Akhil Uniyal, Surajit Kalita, Sayan Chakrabarti
Fundamental constants are crucial for comprehending physical mechanisms, but their measurements contain uncertainties due to experimental limitations. We investigate the impact of…
Gravitational Lensing in Modified Gravity: A case study for Fast Radio Bursts
Surajit Kalita, Shruti Bhatporia, Amanda Weltman
Over the last few decades, a plethora of modifications to general relativity have been proposed to solve a host of cosmological and astrophysical problems. Many modified gravity mo…
Constraining fundamental parameters in modified gravity using Gaia-DR2 massive white dwarf observation
Surajit Kalita, Akhil Uniyal
Various experiments and observations have led researchers to suggest different bounds on fundamental constants like the fine-structure constant and the proton-to-electron mass rati…
Metric-affine effects in crystallization processes of white dwarfs
Surajit Kalita, Lupamudra Sarmah, Aneta Wojnar
We analyze the effects of modified gravity on specific heats of electrons and ions, Debye temperature, crystallization process, and cooling mechanism in white dwarfs. We derive the…
Continuous gravitational wave detection to understand the generation mechanism of fast radio bursts
Surajit Kalita, Amanda Weltman
Since the unexpected discovery of fast radio bursts (FRBs), researchers have proposed varied theories and models to explain these phenomena. One such model that has recently been d…
Cooling Process of White Dwarf Stars in Palatini Gravity
Surajit Kalita, Lupamudra Sarmah, Aneta Wojnar
A simple cooling model of white dwarf stars is re-analyzed in Palatini gravity. Modified gravity affects the white dwarf structures and consequently their ages. We find that…
Massive Neutron Stars and White Dwarfs as Noncommutative Fuzzy Spheres
Surajit Kalita, Banibrata Mukhopadhyay
Over the last couple of decades, there are direct and indirect evidences for massive compact objects than their conventional counterparts. A couple of such examples are super-Chand…
Weak-field limit of gravity to unify peculiar white dwarfs
Surajit Kalita, Lupamudra Sarmah
In recent years, the idea of sub- and super-Chandrasekhar limiting mass white dwarfs (WDs), which are potential candidates to produce under- and over-luminous type Ia supernovae, r…
Stability criterion for white dwarfs in Palatini gravity
Lupamudra Sarmah, Surajit Kalita, Aneta Wojnar
Recent observations of several peculiar over- and under-luminous type Ia supernovae infer indirect evidence for the violation of the Chandrasekhar mass-limit by suggesting the exis…
Natural evidence for fuzzy sphere noncommutative geometry: super-Chandrasekhar white dwarfs
Surajit Kalita, T. R. Govindarajan, Banibrata Mukhopadhyay
Noncommutative geometry is one of the quantum gravity theories, which various researchers have been using to describe different physical and astrophysical systems. However, so far,…
Asymptotically flat black hole solution in modified gravity
Surajit Kalita, Banibrata Mukhopadhyay
From time to time, different observations suggest that Einstein's theory of general relativity (GR) may not be the ultimate theory of gravity. Various researchers have suggested th…
Resolving dichotomy in compact objects through continuous gravitational waves observation
Surajit Kalita, Tushar Mondal, Christopher A. Tout +2
More than two dozen soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) have been detected so far. These are isolated compact objects. Many of them are either found…