3 papers
astro-ph.CO2026
Minimal Extensions of the -Starobinsky Model: Reconciling ACT DR6 and Reheating Constraints
Nehla Shobcha, Norma Sidik Risdianto, Romy Hanang Setya Budhi
The latest combined data from the Atacama Cosmology Telescope (ACT) DR6, Planck, and DESI yields a scalar spectral index , which lies approximately a…
gr-qc2026
The Preheating Stage on The Starobinsky Inflation after ACT
Norma Sidik Risdianto, Romy Hanang Setya Budhi, Nehla Shobcha +2
In this paper, we reinvestigate the Starobinsky inflation model and its reheating features in light of the recent ACT results. To make the Starobinsky model consistent with the ACT…
gr-qc2025
Preventing Curvature Singularities in Dark Energy Models
Romy Hanang Setya Budhi, Nehla Shobcha, Norma Sidik Risdianto
The curvature singularity problem in dark energy models poses a significant challenge to their viability as alternatives to the CDM paradigm. In this work, we investigat…