Mr Ajay Dev

Papers

1. Galaxy And Mass Assembly (GAMA): The group H I mass as a function of halo mass
   10.1093/mnras/stad1575
   In this work, we study the HI-halo mass relation using ALFALFA (HI) and GAMA (galaxy group catalogue). We use a group HI spectral-stacking technique to measure the total group HI content as a function of halo mass.
2. The baryon census and the mass-density of stars, neutral gas, and hot gas as a function of halo mass
   10.1093/mnras/stae2485
   Here, we present a systematic empirical analysis of the baryon content of halos in the local universe across a wide mass range ($10^{10} – 10^{15} M_{\odot}$). Using a compilation of literature measurements we quantify the contributions of hot gas, stars, and cold gas to the total baryon budget in halos. We construct group scaling relations – Stellar to halo mass, HI to halo mass, and Hot gas to halo mass. We combine the scaling relations with halo mass function to estimate the different baryonic component densities as a function of halos. Finally, we provide estimates for the cosmic stellar mass density, cosmic HI mass density and cosmic hot gas density in halos for the local Universe.
3. DINGO : HI – halo mass relation (in-prep)
   In this study, we use the latest DINGO data from the ASKAP survey in GAMA G23 region to study the HI-halo mass relation through galaxy spectral stacking.
4. The X-ray Luminosity and Gas Mass-Halo Mass Scaling Relations from eROSITA Stacking (in-prep)
   In this project, we use the eROSITA public data to study the Lx-Mhalo and Mgas-Mhalo relation through stacking of galaxy groups. We also use Magneticum simulation mocks for eROSITA to validate our stacking algorithm.