activity
20242026
most citedRed, hot, and very metal poor: extreme properties of a massive accreting black hole in the first 500 Myr

7 citations · 22 across the 8 of their papers we have counts for

collaborators

9 papers

astro-ph.IM2026

Feasibility of up-the-ramp sampling under variable sky for ground-based spectrographs

Gaia Gaspar, Marcin Sawicki, Nelson Nunes +2

Many modern near-infrared instruments employ HAWAII-2RG (H2RG) detectors with integration times that can reach 300-600s. Up-the-ramp (UTR) sampling offers advantages over Fowler sa…

astro-ph.GA2026

UV-to-optical insights into the BH model in little red dots

Rosa M. Mérida, Marcin Sawicki, Chris J. Willott +2

Little Red Dots (LRDs) are a heterogeneous class of objects, with several proposed scenarios for their physical nature and evolution. While these theories have been tested on indiv…

astro-ph.GA2026

Testing the BH* model: A UV-to-optical spectral fitting of The Cliff

Rosa M. Mérida, Marcin Sawicki, Gaia Gaspar +2

In the BH* framework, the V-shaped SED of LRDs is produced by an accreting BH embedded in a dense neutral-gas envelope with a near-unity covering factor. This envelope reprocesses…

astro-ph.GA2025★ 1 cited

The rise and fall of Little Red Dots could be driven by the environment

Rosa M. Mérida, Gaia Gaspar, Yoshihisa Asada +9

The Little Red Dot (LRD) paradigm comprises three main unknowns that are intrinsically connected: (1) What is the nature of these sources? (2) How do they form? (3) How do they evo…

astro-ph.GA2025★ 5 cited

Probing the Star Formation Main Sequence down to 10 at

Rosa M. Mérida, Marcin Sawicki, Kartheik G. Iyer +12

The Main Sequence of Star-Forming Galaxies (SFGMS or MS) is a fundamental scaling relation that provides a global framework for studying galaxy formation and evolution, as well as…

astro-ph.GA2025★ 1 cited

A deep dive down the broad-line region: permitted OI, CaII and FeII emission in an AGN Little Red Dot at z=5.3

Roberta Tripodi, Maruša Bradač, Francesco D'Eugenio +27

We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as little red dot at behind the Bullet cluster (Bz5.3), based on JWST/NIRCam an…

astro-ph.GA2025★ 1 cited

CANUCS/Technicolor Data Release 1: Imaging, Photometry, Slit Spectroscopy, and Stellar Population Parameters

Ghassan T. E. Sarrouh, Yoshihisa Asada, Nicholas S. Martis +44

We present the first data release of the CAnadian NIRISS Unbiased Cluster Survey (CANUCS), a JWST Cycle 1 GTO program targeting 5 lensing clusters and flanking fields in parallel (…

astro-ph.GA2025★ 7 cited

Possible environmental quenching in an interacting little red dot pair at

Rosa M. Mérida, Gaia Gaspar, Marcin Sawicki +14

We report the discovery of a group of galaxies that contains two little red dots (LRDs) just 3.3 kpc apart, along with three potential satellite galaxies, as part of the C…

astro-ph.GA2024★ 7 cited

Red, hot, and very metal poor: extreme properties of a massive accreting black hole in the first 500 Myr

Roberta Tripodi, Nicholas Martis, Vladan Markov +29

The James Webb Space Telescope (JWST) has recently discovered a new population of objects at high redshift referred to as `Little Red Dots' (LRDs). Their nature currently remains e…