17 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…
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-…
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 t…
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…
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 $…
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…