School and Workshop on 21-cm Cosmology

Session

Session 8

10 Mar 2026, 16:30

AG69

Conveners

Session 8

• Chair: Soumak Maitra (TIFR)

46. ANN-Based Emulators for Efficient Inference of Reionization Parameters

Saptarshi Sarkar (NCRA-TIFR, Pune)

10/03/2026, 16:30

Constraining the Epoch of Reionization with physically motivated simulations is hampered by the high cost of conventional parameter inference. We present an efficient emulator-based framework that dramatically reduces this bottleneck for the photon-conserving semi-numerical code SCRIPT. Our approach combines (i) a reliable coarse resolution MCMC to locate the high-likelihood region (exploiting...

47. Probing Reionization upto the 'mark': The Marked Power spectrum to unviel the HI 21-cm signal from the Epoch of Reionization

Vishrut Pandya (IIT Indore)

10/03/2026, 16:50

The 21-cm signal arising from the spin-flip transition from neutral hydrogen (HI) in the intergalactic medium (IGM) serves as a powerful probe of the Epoch of Reionization (EoR), the period during which the first luminous sources were formed and Universe went through a phase transition from being neutral to ionized. This signal traces the distribution and properties of the IGM in this critical...