activity
20242026
most citedThe case for super-Eddington accretion in JWST broad-line AGN during the first billion years

11 citations · 37 across the 11 of their papers we have counts for

collaborators

12 papers

astro-ph.GA2026

Constructing X-ray Spectral Models of Galaxies: Varying Contributions from X-ray Binary Populations with Host Galaxy Properties

Emerson Gehr, Bret D. Lehmer, Antara R. Basu-Zych +7

Recent work has shown that the emission from X-ray binary (XRB) populations in galaxies varies with stellar mass (), star formation rate (SFR), and metallicity (). Such…

astro-ph.GA2026

The GlimmIr: Spectroscopic Variability in a z~7 LRD Indicates Rapid Changes in Both the Narrow and Broad Line Regions

Erini Lambrides, Taylor A. Hutchison, Rebecca L. Larson +39

The enigmatic population of ``Little Red Dots'' (LRDs) sit at the center of some of the largest debates in extragalactic astronomy today. The source(s) of ionizing emission and the…

astro-ph.GA2025

Discovery of Multiply Ionized Iron Emission Powered by an Active Galactic Nucleus in a z~7 Little Red Dot

Erini Lambrides, Rebecca Larson, Taylor Hutchison +50

Some of the most puzzling discoveries of NASA's JWST in the early Universe surround the surprising abundance of compact red sources, which show peculiar continuum shapes and broad…

astro-ph.GA2025

The Interstellar Medium in IZw18 seen with JWST/MIRI: I. Highly Ionized Gas

L. K. Hunt, A. Aloisi, M. G. Navarro +19

We present JWST/MIRI spectra from the Medium-Resolution Spectrometer of IZw18, a nearby dwarf galaxy with a metallicity of 3% Solar. Its proximity enables a detailed study of…

astro-ph.GA2025★ 3 cited

Emission Line Diagnostics for IMBHs in Dwarf Galaxies: Accounting for BH Seeding and ULX Excitation

Chris T. Richardson, Jordan Wels, Kristen Garofali +13

Dwarf AGN serve as the ideal systems for identifying intermediate mass black holes (IMBHs) down to the most elusive regimes (). However, the ubiquitousl…

astro-ph.GA2025★ 8 cited

Exploring the mysterious high-ionization source powering [Ne V] in high-z analog SBS0335-052 E with JWST/MIRI

Matilde Mingozzi, Macarena Garcia Del Valle-Espinosa, Bethan L. James +19

Nearby blue compact dwarf galaxies (BCDs) share similar properties with objects from the Epoch of Reionization revealed by JWST, in terms of low stellar mass, low metallicity and h…

astro-ph.GA2025★ 11 cited

Feedback and dynamical masses in high- galaxies: the advent of high-resolution NIRSpec spectroscopy

A. Saldana-Lopez, J. Chisholm, S. Gazagnes +11

Stellar feedback is an essential step in the baryon cycle of galaxies, but it remains unconstrained beyond Cosmic Noon. We study the ionized gas kinematics, dynamical mass and gas-…

astro-ph.GA2024★ 1 cited

Recovering the properties of the interstellar medium through integrated spectroscopy: application to the z~0 ECO volume-limited star-forming galaxy sample

V. Lebouteiller, C. T. Richardson, M. S. Polimera +7

Deriving physical parameters from integrated galaxy spectra is paramount to interpret the cosmic evolution of star formation, chemical enrichment, and energetic sources. We develop…

astro-ph.GA2024★ 3 cited

Probing the heating of the neutral atomic interstellar medium in the Dwarf Galaxy Survey through infrared cooling lines

Maxime Varese, Vianney Lebouteiller, Lise Ramambason +3

Star formation in galaxies is regulated by dynamical and thermal processes. The photoelectric effect on small dust grains usually dominates the heating of the star-forming neutral…

astro-ph.GA2024

An Empirical Framework Characterizing the Metallicity and Star-Formation History Dependence of X-ray Binary Population Formation and Emission in Galaxies

Bret D. Lehmer, Erik B. Monson, Rafael T. Eufrasio +12

We present a new empirical framework modeling the metallicity and star-formation history (SFH) dependence of X-ray luminous ( ergs s) point-source population lu…

astro-ph.HE2024★ 11 cited

The case for super-Eddington accretion in JWST broad-line AGN during the first billion years

Erini Lambrides, Rebecca Larson, Kristen Garofali +23

A multitude of JWST studies reveal a surprising over-abundance of over-massive accreting super-massive black holes (SMBHs) -- leading to a deepening tension between theory and obse…

astro-ph.GA2024

[Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate mass black hole

J. Chisholm, D. A. Berg, R. Endsley +16

Here we present high spectral resolution NIRSpec observations of GN42437, a low-mass (log(M), compact (pc), extreme starburst galaxy…