399 citations · 1.6k across the 65 of their papers we have counts for
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Universality of Halo Shape and its Morphological Evolution across Cosmic Time
Ayan Nanda, Nishikanta Khandai, J. S. Bagla +1
We investigate the evolution of dark matter halo shapes in cosmological N-body simulations both in scale free Einstein-De Sitter (EdS) and CDM cosmologies. We compute the axis r…
Gravitational lensing of 21 cm HI signal: detection prospects at z ~ 1 with uGMRT in galaxy cluster lenses
Sauraj Bharti, Ashish Kumar Meena, J. S. Bagla
The atomic hydrogen HI content of galaxies is intimately related to star formation and galaxy evolution through the baryon cycle, which involves processes such as accretion, feedba…
On the origin of transient features in cosmological N-Body Simulations
J. S. Bagla, Swati Gavas
We study the effect of gravitational clustering at small scales on larger scales by studying mode coupling between virialised halos. We build on the calculation by Peebles (1974) w…
Dispersion in the Hubble-Lemaître constant measurements from gravitational clustering
Swati Gavas, J S Bagla, Nishikanta Khandai
Measurements of the Hubble-Lemaître constant () require us to estimate the distance and recession velocity of galaxies independently. Gravitational clustering that leads to th…
Atomic hydrogen scaling relations at
Apurba Bera, Nissim Kanekar, Jayaram N. Chengalur +1
The atomic hydrogen (HI) properties of star-forming galaxies in the local Universe are known to correlate with other galaxy properties via the ``HI scaling relations''. The redshif…
Exotic Image Formation in Strong Gravitational Lensing by Clusters of Galaxies -- IV. Elliptical NFW Lenses and Hyperbolic Umbilics
Ashish Kumar Meena, Jasjeet Singh Bagla
A source lying near hyperbolic umbilic (HU) leads to a ring-like image formation, constituting four images with high magnification factors and lying in a small region of the lens p…