Sandro Tacchella

AGN selection and demographics from SMILES

Jianwei Lyu, Stacey Alberts, G. H. Rieke, Irene Shivaei et autres

us, es, ca, gb, th (code pays fourni par la source)

JADES and FRESCO Ha-emitting galaxies at z=5.1-5.5

Fengwu Sun, Jakob M. Helton, Eiichi Egami, Kevin Hainline et autres

us, gb, es, nl, au, fr, Soudan du Sud, th, ca (code pays fourni par la source)

A Dusty Quenching-Candidate AGN host at z = 5.7 : massive quiescent galaxies may quench already during the dust-obscured phase

Francesco D’Eugenio, Matilde Brazzini, R. Maiolino, E. Bertola et autres

We present a spectro-photometric analysis of RUBIES-EGS-9809, a broad-line AGN-host galaxy at z=5.7 with a Balmer break and a dominant point-source component. The source is clearly dust reddened (AV≳3 mag), shows hot- and cold-dust emission, and is a Compton-thick X-ray emitter, with …

gb, it, cl, nl (code pays fourni par la source)

Compact Core, Extended Reach: A Bipolar Kiloparsec-scale Elongation in a Little Red Dot at z ≈ 5.5

Zhiyuan Ji, Yang Sun, Mauro Giavalisco, Yongda Zhu et autres

Abstract Little red dots (LRDs) appear extremely compact at rest-frame optical wavelengths, yet many show extended rest-frame UV morphology revealing more complex internal structure. We present a combined analysis of the Very Large Telescope/MUSE rest-frame UV integral-field spectroscopy and continuum-subtracted [O iii …

us, cl, gb (code pays fourni par la source)

Mergers lighting the early Universe: modest star-formation enhancement without evidence for AGN or Lyα triggering

Dávid Puskás, Sandro Tacchella, Charlotte Simmonds, Gareth C. Jones et autres

Abstract Galaxy mergers and interactions are often invoked to explain enhanced star formation, black hole growth, and mass build-up of galaxies at later cosmic times, but their effect is poorly understood at high redshift (z > 2). We use JADES data to …

Soudan du Sud, ru, cl, dk, gb, it, us (code pays fourni par la source)

A Steep-extinction Quasi-stellar Object at z = 4.6: JWST Evidence for Abundant Small Dust Grains

Mingyu Li, Zheng Cai, R. Maiolino, Fengwu Sun et autres

Abstract The rapid accumulation of massive dust reservoirs in the early Universe remains a major challenge in astrophysics. While core-collapse supernovae can inject large dust grains ( a ≳ 0.1 μ m) on short timescales, explaining the total dust budgets in the …

gb, cn, us, cl (code pays fourni par la source)

JADES: Evolution of nitrogen abundances in star-forming galaxies from z ~ 1.5 − 7

Alex J. Cameron, Courtney Carreira, Charlotte Simmonds, Andrew J. Bunker et autres

Abstract We present nitrogen abundance measurements based on the low-ionisation [N ii] λ6583 emission line for 588 galaxies between 1.5 < z < 7.0 from the JWST Advanced Deep Extragalactic Survey (JADES). We detect the temperature-sensitive [O iii] λ4363 auroral line in …

dk, gb, us, cl, it, fr, de, ca (code pays fourni par la source)

A gas-enshrouded and gas-reddened black hole at cosmic dawn

Rohan P. Naidu, Jorryt Matthee, Harley Katz, Anna de Graaff et autres

Abstract The physical processes that led to the formation of billion-solar-mass black holes within the first 700 million years of cosmic time, a period known as cosmic dawn, remain a puzzle 1 . Several theoretical scenarios have been proposed to seed and …

us, at, de, ch, dk, au, fr, it, nl, gb, jp, il, es, pt, be (code pays fourni par la source)

BlackTHUNDER: Evidence of three massive black holes in a z ∼ 5 galaxy

Hannah Übler, Giovanni Mazzolari, Roberto Maiolino, Francesco D’Eugenio et autres

We present observational evidence of three massive, accreting black holes in the z = 5.0167 galaxy J0148-4214 from JWST/NIRSpec-IFU spectroscopy. The black holes are revealed through broad H α emission (FWHM = 430–2920 km/s) without a forbidden-line counterpart in the bright [O …

de, gb, it, es, at, jp, us, fr, ru, au, ch, cz, ca (code pays fourni par la source)

The Blue Jay survey: Deep JWST spectroscopy for a representative sample of galaxies at cosmic noon

Sirio Belli, Minjung Park, J. Trevor Mendel, R. L. Davies et autres

We present the Blue Jay survey, a cycle 1 JWST program aimed at studying the stellar and gas content of galaxies at cosmic noon. The survey consists of deep spectroscopy for 153 targets observed over two pointings in the COSMOS field using …

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JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Wisp Subtraction with the Nonnegative Matrix Factorization Algorithm

Zihao Wu, Benjamin D. Johnson, Daniel J. Eisenstein, Phillip A. Cargile et autres

Abstract Wisps are among the most prominent scattered light artifacts in JWST/NIRCam imaging. They often appear in certain regions of the detectors and contaminate observations at surface-brightness levels relevant for faint-source photometry. We introduce a new subtraction method that uses the nonnegative …

us, gb (code pays fourni par la source)

Out of oxygen: extremely metal-poor galaxy candidates identified at 2.5 < z < 6.5 with deep JADES medium-band imaging

James Trussler, Daniel J. Eisenstein, Andrew J. Bunker, Alex J. Cameron et autres

ABSTRACT The James Webb Space Telescope (JWST) is beginning to uncover a population of extremely metal-poor galaxies (EMPGs, $Z \lt 1~{{\ \rm per\ cent}}~\mathrm{Z}_\odot$) at redshift $z \gt 3$, mostly through serendipitous Near Infrared Spectrograph (NIRSpec) discoveries and blind slitless spectroscopy. To …

us, gb, dk, it, fr, de, cl (code pays fourni par la source)