8 papers
Escaping ionizing photons from massive spiral galaxies at
Soumil Maulick, Kanak Saha
We report the detection of Lyman continuum (LyC) photons from three massive () spiral galaxies at a redshift of nearly 1 in the AstroSat UV…
Chemically primitive dwarf accretion reignites the inner disk assembly of Malin 1
Manish Kataria, Kanak Saha
We present a detailed kinematic and stellar population analysis of the inner disk of Malin 1, a giant low surface brightness (GLSB) galaxy with a prominent SB0-type central morphol…
Rapid bulge assembly in young galaxy disks at Cosmic Dawn
Anshuman Borgohain, Kanak Saha
Recent observations with the James Webb Space Telescope (JWST) have begun to reveal a surprising morphological diversity in galaxies within the first billion years after the Big Ba…
The AstroSat UV Deep Field South-V: Constraints on the average escape of ionizing photons in the cosmic dusk
Soumil Maulick, Kanak Saha
We investigate the escape of ionizing (Lyman-continuum; LyC) photons from 49 star-forming galaxies at redshifts , using far-ultraviolet (FUV) imaging from the Ultra-Vio…
GNHeII J1236+6215: A He II 1640 emitting and potentially LyC leaking galaxy at = 2.9803 unveiled through JWST & Keck observations
Chayan Mondal, Kanak Saha, Anshuman Borgohain +6
He II 1640 emission in galaxies indicates the presence of sources that produce extreme ionizing photons. Here, we report the discovery of a He II 1640 emitting galaxy, GNHeII…
Clump-fed black hole growth in the first billion years of the universe
Manish Kataria, Kanak Saha, Bruce Elmegreen
Understanding how supermassive black holes (SMBHs) form in the early universe is one of the most challenging problems in astrophysics. Their high abundance in the first billion yea…