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20242026
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astro-ph.GA2026

JWST Reveals Two Overmassive Black Hole Candidates in Dwarf Galaxies at z 0.7: Pushing Black Hole Searches into the Dwarf-Galaxy Regime

E. Iani, P. Rinaldi, A. Torralba +35

We report the discovery and characterization of two compact galaxies, Pelias and Neleus, at z ~ 0.71 and z ~ 0.75, identified in MACS J0416.1-2403 and GOODS-North. Both exhibit unu…

astro-ph.GA2025

MIDIS. Near-infrared rest-frame morphology of massive galaxies at in the Hubble eXtreme Deep Field

L. Costantin, S. Gillman, L. A. Boogaard +29

Thanks to decades of observations using the Hubble Space Telescope (HST), the structure of galaxies at redshift has been widely studied in the rest-frame ultraviolet regime,…

astro-ph.GA2024

Insight into the Starburst Nature of Galaxy GN-z11 with JWST MIRI Spectroscopy

J. Álvarez-Márquez, A. Crespo Gómez, L. Colina +21

This paper presents a deep MIRI/JWST medium resolution spectroscopy (MRS) covering the rest-frame optical spectrum of the GN-z11 galaxy. The [OIII]5008 and H emission lines are…

astro-ph.GA2024

The Lyman Alpha Reference Sample. XVI. Global 21cm HI properties of Lyman- emitting galaxies

A. Le Reste, M. J. Hayes, J. M. Cannon +9

The Lyman- (Lya) line of hydrogen is a well-known tracer of galaxies at high-z. However, the connection between Lya observables and galaxy properties has not fully been establi…

astro-ph.GA2024

MICONIC: JWST/MIRI MRS observations of the nuclear and circumnuclear regions of Mrk231

A. Alonso-Herrero, L. Hermosa Muñoz, A. Labiano +22

We present JWST/MIRI MRS spatially resolved m observations of the central ~4-8kpc of the ultraluminous infrared galaxy and broad absorption line quasar Mrk231. These…