4 citations · 12 across the 19 of their papers we have counts for
19 papers
Stellar Halo Memory: A New Observable for Galactic Archaeology
Biswajit Pandey, Amit Mondal
The Galactic stellar halo preserves a fossil record of the Milky Way's assembly history, yet there is currently no unified framework for quantifying how much of this information su…
Entropic backreaction from cosmic structure formation: a thermodynamic approach to the late-time cosmological tensions
Biswajit Pandey
High-precision cosmological observations have revealed persistent tensions within the standard CDM paradigm, most notably the discrepancy in the Hubble constant and the lower th…
A Multi-parameter Fuzzy Set Framework for Classifying Red, Blue, and Green Valley Galaxies
Amit Mondal, Biswajit Pandey
We present a data-driven fuzzy set framework for classifying galaxies into the red sequence, blue cloud, and green-valley populations using multiple observables from the Sloan Digi…
An information-theoretic bound on cosmic coherence in finite-volume simulations
Biswajit Pandey, Anindita Nandi
We quantify the physical memory of the cosmic density field using mutual information between -body snapshots at different redshifts, removing a random baseline to isolate gravit…
Separating halo and disk stars in galaxies with Fuzzy Set Theory
Amit Mondal, Biswajit Pandey
Disk and halo stars are generally classified using several conventional methods, such as the Toomre diagram, sharp cuts in metallicity ([Fe/H]), vertical distance (…
From metallicity distributions to mutual information: A new perspective on stellar halo assembly
Amit Mondal, Biswajit Pandey
The metallicity structure of stellar halos encodes the fossil record of galaxy assembly, tracing the chemical evolution and dynamical imprint of past mergers. Using five Milky Way-…
Probing cosmic isotropy with Gamma-ray bursts: A dipole and quadrupole analysis of BATSE and Fermi GBM data
Debosi Mondal, Biswajit Pandey, Amit Mondal
The cosmological principle, asserting large-scale homogeneity and isotropy, underpins the standard model of cosmology. Testing its validity using independent astronomical probes re…
Tracing correlations between galaxy properties across the Cosmic Web: An IllustrisTNG-based study
Anindita Nandi, Biswajit Pandey, Prakash Sarkar
We explore the impact of cosmic web environments on galaxy properties such as colour, stellar mass, star formation rate, and stellar metallicity, using a stellar mass-matc…
Revealing a transitional epoch of large-scale cosmic anisotropy in the quasar distribution
Amit Mondal, Biswajit Pandey, Krishna Ghosh
The Cosmological Principle posits that the Universe is isotropic on the largest scales. While widely supported, this foundational assumption remains testable. We analyse the angula…
Galaxy quenching across the Cosmic Web: disentangling mass and environment with SDSS DR18
Anindita Nandi, Biswajit Pandey
We investigate the influence of large-scale cosmic web environments on galaxy quenching using a volume-limited, stellar mass-matched galaxy sample from SDSS DR18. Galaxies are clas…
Triggering and quenching in the shadow of AGN: How does AGN proximity affect star formation in the EAGLE simulation?
Apashanka Das, Biswajit Pandey
Active galactic nuclei (AGN) inject vast amounts of energy into their surroundings and are widely recognised as key drivers of galaxy evolution through feedback processes. Although…
Spatial and velocity anisotropies of stellar halos across cosmic web environments: Insights from IllustrisTNG simulation
Amit Mondal, Biswajit Pandey, Anindita Nandi
The role of large-scale environment in shaping the structural and kinematic properties of stellar halos remains an open question. We investigate whether the cosmic web environments…
The long road to the Green Valley: Tracing the evolution of the Green Valley galaxies in the EAGLE simulation
Apashanka Das, Biswajit Pandey
We study the evolution of the progenitors of the present-day Green Valley (GV) galaxies across redshift using data from the EAGLE simulations. We identify the present-day…
Exploring the evolution of red and blue galaxies in different cosmic web environments using IllustrisTNG simulation
Biswajit Pandey, Anindita Nandi
We analyze the evolution of red and blue galaxies in different cosmic web environments from redshift to using the IllustrisTNG simulation. We use Otsu's method to class…
Resolving inconsistencies in Relativistic Thermodynamics with four-entropy and four-heat current
Biswajit Pandey
We address long-standing inconsistencies in relativistic thermodynamics, particularly the ambiguities in temperature transformations and entropy evolution in moving or accelerating…
Impact of cosmic web on galaxy properties and their correlations: Insights from Principal Component Analysis
Anindita Nandi, Biswajit Pandey
We use Principal Component Analysis (PCA) to analyze a volume-limited sample from the SDSS and explore how cosmic web environments affect the interrelations between various galaxy…
The roles of environment and interactions on the evolution of red and blue galaxies in the EAGLE simulation
Apashanka Das, Biswajit Pandey
We study the evolution of the red and blue galaxies from to using the EAGLE simulation. The galaxies in the blue cloud and the red sequence are separated at each redshi…
The size and shape dependence of the SDSS galaxy bispectrum
Anindita Nandi, Sukhdeep Singh Gill, Debanjan Sarkar +3
We have measured the spherically averaged bispectrum of the SDSS main galaxy sample, considering a volume-limited data cube with mean galaxy number density $…
Clustering and physical properties of AGN and Star-Forming Galaxies at fixed stellar mass: does assembly bias have a role in AGN activity?
Amrita Banerjee, Biswajit Pandey, Anindita Nandi
We analyze a volume-limited sample from the Sloan Digital Sky Survey (SDSS) to compare the spatial clustering and physical properties of active galactic nuclei (AGN) and star-formi…