Roger E. Cohen

GLOW II: A Census of Oxygen in Low-Mass Galaxies

Kristen B. W. McQuinn, O. Grace Telford, Andrey V. Kravtsov +12

Oxygen is forged by stars and redistributed through galaxies by feedback-driven outflows, leaving a record of star formation and the baryon cycle imprinted on its present-day abund…

Radial Stellar Age Gradients in 42 Local Volume Dwarf Galaxies

Roger E. Cohen, Kristen B. W. McQuinn, O. Grace Telford +4

We present radial stellar age gradients measured from star formation histories (SFHs) fit to resolved color-magnitude diagrams (CMDs) of 42 Local Volume dwarfs (6 $≲$ Log M$_{…

GLOW I: Comprehensive Measurements of Gas-Rich, Star-Forming, Low-Mass Galaxies in the Nearby Universe

Kristen B. W. McQuinn, O. Grace Telford, Roger Cohen +12

Gas-rich, star-forming, low-mass galaxies in the nearby universe are powerful laboratories for studying baryonic physics in detail including: stellar mass assembly, stellar feedbac…

Scylla: Observational Evidence for an Order of Magnitude in Dust Mass Opacity Evolution with ISM Density in the Large Magellanic Cloud

Christina W. Lindberg, Christopher J. R. Clark, Claire E. Murray +11

The emissivity of dust is known to vary greatly with radiative environment, density, grain chemistry, and geometry. Discrepancies between dust mass surface densities derived from f…

Scylla VI: Parsec-Scale Dust Extinction Maps in the SMC and LMC

Christina W. Lindberg, Claire E. Murray, Christopher J. R. Clark +14

We present a novel methodology for mapping dust extinction in nearby galaxies at parsec-scale resolution. We apply it to HST 68 fields within the Small and Large Magellanic Clouds…

Probing the IMF in the Early Universe -- Direct measurements in the Boötes I UFD with JWST/NIRCam

Keyi Ding, Mario Gennaro, Roberto J. Avila +20

The dependence of the stellar initial mass function (IMF) on star-formation environment, particularly at low metallicities and high redshifts, remains poorly constrained. Ultra-fai…

cond-mat.quant-gas2026

Extreme (Rogue) Waves: From Theory to Experiments in Ultracold Gases and Beyond

A. Chabchoub, P. Engels, P. G. Kevrekidis +4

In this Chapter, we review key theoretical and experimental advances in the study of extreme nonlinear wave events, called rogue waves (RWs), in both single-component attractively…

The Stellar Initial Mass Function down to 0.16M $_{⊙}$ Towards the Small Magellanic Cloud

Roger E. Cohen, Mario Gennaro, Matteo Correnti +2

The presence (and nature) of variations in the stellar initial mass function (IMF) at substantially sub-solar masses and metallicities ( $m$ $<$ 0.5M $_{⊙}$ , [M/H] $≲$ $-$ 1) r…

The JWST Resolved Stellar Populations Early Release Science Program. IX. The RR Lyrae Population in WLM with HST and JWST

Catherine M. Slaughter, Evan D. Skillman, Alessandro Savino +16

RR Lyrae stars are a common, dependable Population II distance indicator, and provide an independent tracer of early star formation. Here, we utilize archival HST/ACS and JWST/NIRC…

A Quenched and Relatively Isolated Dwarf Galaxy in the Local Volume

Tehreem N. Hai, Kristen B. W. McQuinn, Yao-Yuan Mao +7

An increasing number of discoveries of isolated and quenched dwarf galaxies are challenging the idea that the present-day local environment of low-mass systems is the main determin…

Scylla V: Constraints on the spatial and temporal distribution of bursts and the interaction history of the Magellanic Clouds from their resolved stellar populations

Clare Burhenne, Kristen B. W. McQuinn, Roger E. Cohen +9

We measure the star formation histories (SFHs) from the Scylla survey in approximately 98,000 pc^2 and 75,000 pc^2 of the SMC and LMC, respectively, using deep Hubble Space Telesco…

The Proper Motion of Draco II with HST using Multiple Reference Frames and Methodologies

Jack T. Warfield, Kevin A. McKinnon, Sangmo Tony Sohn +13

We present proper motion (PM) measurements for Draco II, an ultra-faint dwarf satellite of the Milky Way. These PMs are measured using two epochs of Hubble Space Telescope Advanced…

Searching for Stellar-Feedback-Driven Outflow Signatures: A Deep Dive into NGC 3741

Lexi N. Gault, Liese van Zee, Elizabeth A. K. Adams +5

Stellar feedback drives winds and outflows critical to the baryon cycles of low-mass galaxies whose shallow gravitational potential wells make them particularly susceptible to mass…

A Unified Framework Connecting Chemical Enrichment to Resolved Star Formation Histories with Applications to Local Group Dwarf Irregulars

Christopher T. Garling, Alex M. Garcia, Niusha Ahvazi +4

We present a new framework for modeling the chemical enrichment histories of galaxies by integrating chemical evolution with resolved star formation histories (SFHs) derived from c…

Wide binaries in an ultra-faint dwarf galaxy: discovery, population modeling, and a nail in the coffin of primordial black hole dark matter

Cheyanne Shariat, Kareem El-Badry, Mario Gennaro +24

We report the discovery and characterization of a wide binary population in the ultrafaint dwarf galaxy Boötes I using deep JWST/NIRCam imaging. Our sample consists of 52 candidate…

Observed Timescales of Stellar Feedback in Star-Forming, Low-Mass Galaxies

Laura C. Hunter, Liese van Zee, Roger E. Cohen +5

Understanding the timescales of atomic gas turbulence is crucial to understanding the interplay between star formation and the interstellar medium (ISM). To investigate the timesca…

The JWST Resolved Stellar Populations Early Release Science Program. VIII. The Spatially Resolved Star Formation History of WLM

Roger E. Cohen, Kristen B. W. McQuinn, Alessandro Savino +17

We measure radial stellar age gradients in the relatively isolated gas-rich dwarf irregular WLM, combining JWST NIRCam and NIRISS imaging with six archival Hubble fields over semi-…

Scylla III. The Outside-In Radial Age Gradient in the Small Magellanic Cloud and the Star Formation Histories of the Main Body, Wing and Outer Regions

Roger E. Cohen, Kristen B. W. McQuinn, Claire E. Murray +13

The proximity of the Large and Small Magellanic Clouds (LMC and SMC) provides the opportunity to study the impact of dwarf-dwarf interactions on their mass assembly with a unique l…

Scylla II. The Spatially Resolved Star Formation History of the Large Magellanic Cloud Reveals an Inverted Radial Age Gradient

Roger E. Cohen, Kristen B. W. McQuinn, Claire E. Murray +11

The proximity of the Magellanic Clouds provides the opportunity to study interacting dwarf galaxies near a massive host, and spatial trends in their stellar population properties i…

Scylla I: A pure-parallel, multi-wavelength imaging survey of the ULLYSES fields in the LMC and SMC

Claire E. Murray, Christina W. Lindberg, Petia Yanchulova Merica-Jones +17

Scylla is a deep Hubble Space Telescope survey of the stellar populations, interstellar medium and star formation in the LMC and SMC. As a pure-parallel complement to the Ultraviol…