3 papers
astro-ph.GA2026
Clump Migration in Disk Galaxies: Revisiting Chandrasekhar's Dynamical Friction
Pushpak Pandey, Kanak Saha
Massive stellar clumps are thought to migrate toward galactic centers through dynamical friction, contributing to bulge growth and the structural evolution of disk galaxies. While…
astro-ph.GA2026
AstroSat UV Deep Field IV. An Extended UV disk around a massive spiral galaxy at z=0.67
Pushpak Pandey, Kanak Saha, Sanchayeeta Borthakur
Extended ultraviolet (XUV) emission in nearby disk galaxies supports the inside-out growth scenario through low-efficiency star formation in their outer regions. However, such dete…
astro-ph.IM2024
A geometric approach to estimate background in astronomical images
Pushpak Pandey, Kanak Saha
Estimating the true background in an astronomical image is fundamental to detecting faint sources. In a typical low-photon count astronomical image, such as in the far and near-ult…