A pipeline for fitting Little Red Dots (LRDs)

by Ms. Efrat Yosefi

BGU

at Astrophysics and Cosmology Seminar

Wed, 02 Jul 2025, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

The unprecedented infrared capabilities and remarkable angular resolution of JWST have revealed a vast and previously unknown population of faint, high-redshift sources of intriguing properties. The nature of these sources, dubbed Little Red Dots (LRDs) due to their red and compact point-source like appearance, is still under investigation.
LRDs are special in their unique V-shape Spectral Energy Distribution (SED), and given that they show broad emission lines, are mostly thought to be Active Galactic Nuclei (AGN), where a high dust content or dense hydrogen slab are often invoked to explain some of their properties.
In my talk, I will present these red point sources and their intriguing properties, photometry, and SED; I will explain the empirical, AGN-based model we constructed and the custom pipeline we built to fit the photometric data in order to learn about their physical properties, as well as the LRD selection process in new data. I will also demonstrate the results of fitting some selected sources with my model, and discuss some improvements that should be included the pipeline in the near future.

Created on 28-06-2025 by Zitrin, Adi (zitrin)
Updaded on 28-06-2025 by Zitrin, Adi (zitrin)