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most citedSIGNALS of Giant HII Regions: A Spatially Resolved Analysis of NGC 604

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astro-ph.GA2026

H II region filling factors in NGC 628: Luminosity-size relation and connection with polycyclic aromatic hydrocarbon emission

Lorena Aragüete Riesco, José M. Vílchez, Salvador Duarte Puertas +7

Understanding the internal structure of H II regions is fundamental for constraining star formation processes in galaxies. We investigated how the filling factor (FF) relates to lu…

astro-ph.GA2026

Implications of Broad [O III] 4364 and UV Line Emission in Two Little Red Dots at z ~ 7 - 8

Casey Papovich, Kaila Ronayne, Weida Hu +17

We present deep, NIRSpec G140M and G395M spectroscopy of Little Red Dots (LRDs) at z = 6.68 and z = 8.35. Both LRDs show broad Balmer and [O III] 4364 emission. The broad [O III…

astro-ph.GA20251 cited

SIGNALS of Giant HII Regions: A Spatially Resolved Analysis of NGC 604

Ray Garner, Robert C. Kennicutt, Laurent Drissen +6

Observing giant HII regions at fine spatial scales uncovers detailed structures and reveals variations in ionization, abundance, and dynamical properties of ionized gas and the eff…

astro-ph.GA2025

Ionized gas in NGC 4258: Exploring the AGN -- Star formation connection

D. Fernández-Arenas, L. Rousseau-Nepton, C. Robert +9

NGC 4258 is a prime target for studying feedback in Low-Luminosity Active Galactic Nuclei (LLAGNs) due to its proximity and comprehensive multi-wavelength coverage. Using new Integ…

astro-ph.GA2025

Optical Strong Line Ratios Cannot Distinguish Between Stellar Populations and Accreting Black Holes at High Ionization Parameters and Low Metallicities

Nikko J. Cleri, Grace M. Olivier, Bren E. Backhaus +24

High-redshift observations from JWST indicate that optical strong line ratios do not carry the same constraining power as they do at low redshifts. Critically, this prevents a sepa…

astro-ph.GA2025

SIGNALS on the mixing of oxygen and nitrogen in the spiral galaxy NGC 6946

Fabio Bresolin, David Fernández-Arenas, Laurie Rousseau-Nepton +10

As part of the SIGNALS survey, which comprises a sample of approximately 40 nearby galaxies observed with the Fourier transform spectrometer SITELLE, we present a study of metal mi…