81 citations · 413 across the 31 of their papers we have counts for
8 papers · 1 filter
Axion-Photon Conversion in FLRW with Primordial Magnetic Fields: Explaining the Radio Excess
Setabuddin, Md Riajul Haque, Rajesh Karmakar +1
We explore the possibility of axion-photon conversion as a common origin of two low-frequency anomalies: the isotropic radio excess (ARCADE2) and the deep global 21-cm absorption t…
Burdening (or not) gravitational waves in the presence of primordial black holes
Mathieu Gross, Md Riajul Haque, Yann Mambrini
We present the spectrum of primordial gravitational wave (GW) expected from the presence of primordial black holes (PBH) and inflaton in the early Universe. For the first time, we…
Minimal Plateau Inflation in light of ACT DR6 Observations
Md Riajul Haque, Debaprasad maity
We explore a class of minimal plateau inflationary models constrained by the latest cosmological observations from ACT DR6, Planck 2018, BICEP/Keck 2018, and DESI, collectively ref…
Impact of general relativistic accretion on primordial black holes
Santabrata Das, Md Riajul Haque, Jitumani Kalita +2
We demonstrate that general relativistic corrections to the accretion of relativistic matter onto primordial black holes (PBHs) can significantly enhance their mass growth during t…
Improved Predictions on Higgs-Starobinsky Inflation and Reheating with ACT DR6 and Primordial Gravitational Waves
Md Riajul Haque, Sourav Pal, Debarun Paul
We investigate the implications of recent CMB observations for Higgs-Starobinsky inflationary models and their associated reheating dynamics, utilizing data from ACT DR6, Planck 20…
ACT DR6 Insights on the Inflationary Attractor models and Reheating
Md Riajul Haque, Sourav Pal, Debarun Paul
We investigate the observational constraints on -attractor inflationary models and their post-inflationary reheating dynamics in light of the latest CMB data from ACT DR6 combin…
Generalizing the Bogoliubov vs Boltzmann approaches in gravitational production
Ayan Chakraborty, Simon Clery, Md Riajul Haque +2
We investigate the spectral behavior of scalar fluctuations generated by gravity during inflation and the subsequent reheating phase. We consider a non-perturbative Bogoliubov trea…
Gravitational Wave Signatures of Primordial Black Hole Reheating in Upcoming Interferometry Missions
Debarun Paul, Md Riajul Haque, Supratik Pal
We investigate the prospects of detecting a stochastic gravitational wave (GW) background from the primordial black hole (PBH) reheating epoch. If PBHs form during a non-standard c…