RSAA Colloquia / Seminars / Feast-of-Facts: Tuesday, 01 April 2025, 11:00-12:00; ZOOM or Duffield Lecture Theatre


Ivo Labbe

"Little Red Dots, Big Open Questions"

The James Webb Space Telescope (JWST) has uncovered a mysterious population of extremely compact, red sources at high redshift - so-called ’’Little Red Dots’’ (LRDs). Found ubiquitously across JWST fields, these objects exhibit broad Balmer lines, peculiar V-shaped spectral energy distributions (SEDs), and a diversity of properties that challenge conventional classification. Are LRDs the earliest growing black holes with unprecedented gas densities? Or could they be massive, extremely compact galaxies whose stellar kinematics mimic broad-line emission? Despite extensive studies, a consensus has yet to emerge. I will discuss the current state and future directions of one of JWST’s most intriguing and debated discoveries.