Joris Witstok

0000-0002-7595-121X

astro-ph.GAastro-ph.COastro-ph.IMastro-ph.HEEarly universeGalaxiesGalaxies and clusters

On Valency

published · living versions

W_bkebnq87·v1 · currentpublished

UV spectra of little red dots: Broad-line N/C, gas recycling and black hole masses

with Albert Sneppen, Darach Watson, Lucy R. Ivey, Kasper E. Heintz +6

1 version

Preprints & journals

146 papers in the corpus · 2021–2026

Dust at cosmic dawn: unveiling the onset of dust and obscured star formation at

z\gtrsim8

2610.21460v1 · Hiddo Algera, Tom Bakx, Manuel Aravena et al.2026 · 0 citationsarXiv

IRAC-Excess Galaxies in the NIRSpec Wide Survey: physical properties of bright EELGs at

z\sim7

and implications for Reionization2610.20332v1 · Katherine Ormerod, Renske Smit, Joris Witstok et al.2026 · 0 citationsarXiv

The dawn of the first galaxies2610.20733v2 · Livia Vallini, Tanio Diaz Santos, Belen Alcalde Pampliega et al.2026 · 0 citationsarXiv

The DAWN JWST Archive: A spectroscopically-informed population study of the physical properties of galaxies at z>22610.15901v1 · Rashmi Gottumukkala, Gabriel Brammer, Sune Toft et al.2026 · 0 citationsarXiv

Source--Line Associations in JWST/NIRSpec Dense-Shutter Spectroscopy2609.35423v1 · Zihao Wu, Daniel J. Eisenstein, Francesco D'Eugenio et al.2026 · 0 citationsarXiv

NOEMA probes the [CII] and dust content in a 2175Å UV Bump Galaxy at

z=7.1

2609.12203v1 · Katherine Ormerod, Renske Smit, Joris Witstok et al.2026 · 0 citationsarXiv

JWST spectroscopy of galaxies at

z>10

: Damped Ly

\alpha

absorbers reveal efficient star formation and hidden redshift biases2606.30787v1 · Kasper E. Heintz, Clara L. Pollock, Joris Witstok et al.2026 · 0 citationsarXiv

Chemical signatures from the first stars embedded in metal-poor gas in galaxies at cosmic dawn2606.13078v1 · Clara L. Pollock, Kasper E. Heintz, Elka Rusta et al.2026 · 0 citationsarXiv

A direct black-hole mass measurement in a little red dot at high redshift.42203931 · Juodžbalis, Ignas, Marconcini, Cosimo, D'Eugenio, Francesco et al.2026 · 19 citationsNature. 2026;653(8116):1017-1021

Dust enrichment from core-collapse supernovae and extinction curves in the high-redshift universe2604.26750v1 · Koki Otaki, Raffaella Schneider, Simone Bianchi et al.2026 · 0 citationsarXiv

Intense and extended CIII] emission suggests a strong outflow in JADES-GS-z14-02604.11899v1 · Stefano Carniani, Peter Jakobsen, Giacomo Venturi et al.2026 · 0 citationsarXiv

Paschen Jumps in Little Red Dots: Evidence for Nebular Continua2604.09399v1 · Albert Sneppen, James H. Matthews, Darach Watson et al.2026 · 0 citationsarXiv

The Way We Tally Becomes the Tale: the Impact of Selection Strategies on the Inferred Evolution of Little Red Dots Across Cosmic Time2604.07138v2 · Pierluigi Rinaldi, Kevin Hainline, Francesco D'Eugenio et al.2026 · 0 citationsarXiv

Holes in the BH

^\star

? AGN signatures in the FUV spectrum of a black-hole dominated Little Red Dot at

z=7.04

2604.03370v1 · Xihan Ji, Gabriele Pezzulli, Francesco D'Eugenio et al.2026 · 1 citationarXiv

GA-NIFS and JADES: Confirmation of pristine gas near GN-z112603.20360v2 · Hannah Ubler, Roberto Maiolino, Pablo G. P'erez-Gonz'alez et al.2026 · 2 citationsarXiv

An OASIS of Lyman-

\alpha

within a neutral intergalactic desert: reaffirmed line and blue continuum reveal efficient ionising agents at

z = 13

2603.18775v1 · Joris Witstok, Stefano Carniani, Peter Jakobsen et al.2026 · 1 citationarXiv

Out of oxygen: Extremely metal-poor galaxy candidates identified at

2.5 < z < 6.5

with deep JADES medium-band imaging2603.15761v2 · James A. A. Trussler, Daniel J. Eisenstein, Andrew J. Bunker et al.2026 · 1 citationMon Not R Astron Soc (2026)

A hot, nebular-dominated galaxy interacting with a pristine PopIII system uncovered by JWST2603.13471v2 · Henriette Reumert, Kasper E. Heintz, Clara L. Pollock et al.2026 · 0 citationsarXiv

GA-NIFS: Dissecting The Alchemised: JWST reveals turbulent metal-poor gas fuelling a co-spatial starburst in a complex system at

z=10.17

2603.00232v3 · Robert G. Pascalau, Francesco D'Eugenio, Roberto Maiolino et al.2026 · 2 citationsMon Not R Astron Soc (2026)

Little Red Dots: One Photometric Tag Concealing Diverse Spectroscopic Flavors of Massive Star Formation and Black Hole Activity2602.20247v3 · Pablo G. P'erez-Gonz'alez, Guillermo Barro, Stefano Carniani et al.2026 · 1 citationarXiv

Characterising Ly

\alpha

damping wings at the onset of reionisation: Evidence for highly efficient star formation driven by dense, neutral gas in UV-bright galaxies at

z>9

2602.11783v1 · Clara L. Pollock, Kasper E. Heintz, Joris Witstok et al.2026 · 0 citationsarXiv

Inside the cocoon: a comprehensive explanation of the spectra of Little Red Dots2601.18864v1 · A. Sneppen, D. Watson, J. H. Matthews et al.2026 · 0 citationsarXiv

JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Photometrically Selected Galaxy Candidates at z > 82601.15959v2 · Kevin N. Hainline, Daniel J. Eisenstein, Lily Whitler et al.2026 · 1 citationarXiv

JADES: A Prominent Galaxy Overdensity Candidate within the First 500 Myr2601.15960v2 · Zihao Wu, Daniel J. Eisenstein, Benjamin D. Johnson et al.2026 · 1 citationarXiv

JADES: Discovery of Large Reservoirs of Small Dust Grains in the Circumgalactic Medium of Massive Galaxies at

z\sim3.5

through Deep JWST/NIRCam Imaging and Grism Spectroscopy2601.15961v1 · Fengwu Sun, Daniel J. Eisenstein, Francesco D'Eugenio et al.2026 · 2 citationsarXiv

JADES: Evolution of nitrogen abundances in star-forming galaxies from z ~ 1.5-72601.15964v1 · Alex J. Cameron, Courtney Carreira, Charlotte Simmonds et al.2026 · 1 citationMon Not R Astron Soc (2026)

Little red dots as young supermassive black holes in dense ionized cocoons.41535486 · Rusakov, V, Watson, D, Nikopoulos, G P et al.2026 · 77 citationsNature. 2026;649(8097):574-579

Ionizing Photon Production Efficiencies and Chemical Abundances at Cosmic Dawn Revealed by Ultra-Deep Rest-Frame Optical Spectroscopy of JADES-GS-z14-02512.19695v1 · Jakob M. Helton, Jane E. Morrison, Kevin N. Hainline et al.2025 · 0 citationsarXiv

A first systematic study of [OIII] 88

\mu

m at

z>8

: two luminous oxygen lines and a powerful ionized outflow in the first 600 million years2512.14486v2 · Hiddo S. B. Algera, John R. Weaver, Tom J. L. C. Bakx et al.2025 · 1 citationarXiv

Probing Infrared eXcess to Investigate Early-Universe Dust (PIXIEDust)2512.07964v1 · Tom J. L. C. Bakx, Hiddo S. B. Algera, Jean-Baptiste Jolly et al.2025 · 5 citationsarXiv

Mergers lighting the early Universe: modest star formation enhancement without evidence for AGN or Ly

\alpha

triggering2510.14743v2 · D'avid Pusk'as, Sandro Tacchella, Charlotte Simmonds et al.2025 · 1 citationMNRAS, 552, Issue 1, stag1698 (2026)

REBELS-IFU: Linking damped Lyman-

\alpha

absorption to [CII] emission and dust content in the EoR2510.11351v1 · Lucie E. Rowland, Kasper E. Heintz, Hiddo Algera et al.2025 · 1 citationarXiv

JADES Dark Horse: demonstrating high-multiplex observations with JWST/NIRSpec dense-shutter spectroscopy in the JADES Origins Field2510.11626v2 · Francesco D'Eugenio, Erica J. Nelson, Daniel J. Eisenstein et al.2025 · 4 citationsMon Not R Astron Soc (2026)

Evidence for inefficient dust production in a massive, metal-rich galaxy at

z=7.13

uncovered by JWST and ALMA2510.07936v2 · Kasper E. Heintz, Darach Watson, Francesco Valentino et al.2025 · 1 citationarXiv

The cosmic web's Lyman-

\alpha

glow at

z \approx 2.5

; hydrodynamic models, dust, and wide-field, narrow-band detection2510.07259v2 · Oleksii Sokoliuk, John K. Webb, Kenneth M. Lanzetta et al.2025 · 0 citationsarXiv

Evidence of violation of Case B recombination in Little Red Dots2510.06362v1 · G. P. Nikopoulos, D. Watson, A. Sneppen et al.2025 · 6 citationsA&A 710, A136 (2026)

JADES Data Release 4 -- Paper II: Data reduction, analysis and emission-line fluxes of the complete spectroscopic sample2510.01034v1 · J. Scholtz, S. Carniani, E. Parlanti et al.2025 · 15 citationsarXiv

JADES: The Star Formation and Dust Attenuation Properties of Galaxies at 3<z<72510.00235v1 · Charity Woodrum, Irene Shivaei, Joris Witstok et al.2025 · 1 citationarXiv

JADES: the chemical enrichment pattern of distant galaxies --

\alpha

enhancement, silicon depletion, and iron enhancement2509.18055v2 · Yuki Isobe, Roberto Maiolino, Xihan Ji et al.2025 · 2 citationsarXiv

REBELS-IFU: on the origin of the elevated [OIII]/[CII] ratios in the early Universe2509.16071v1 · Hiddo Algera, Lucie Rowland, Renske Smit et al.2025 · 2 citationsarXiv

Diversity and Evolution of Dust Attenuation Curves from Redshift z ~ 1 to 92509.01795v3 · Irene Shivaei, Rohan P. Naidu, Francisco Rodriguez Montero et al.2025 · 9 citationsarXiv

On the origins of oxygen: ALMA and JWST characterise the multi-phase, metal-enriched, star-bursting medium within a 'normal'

z > 11

galaxy2507.22888v4 · Joris Witstok, Renske Smit, William M. Baker et al.2025 · 6 citationsarXiv

JADES: Carbon-enhanced, Nitrogen-normal compact galaxy at z=11.22507.17809v3 · J. Scholtz, M. S. Silcock, E. Curtis-Lake et al.2025 · 6 citationsarXiv

JADES reveals a large population of low mass black holes at high redshift2506.22147v1 · Sophia Geris, Roberto Maiolino, Yuki Isobe et al.2025 · 17 citationsMon Not R Astron Soc (2025)

JADES and BlackTHUNDER: rest-frame Balmer-line absorption and the local environment in a Little Red Dot at z = 52506.14870v2 · Francesco D'Eugenio, Ignas Juodzbalis, Xihan Ji et al.2025 · 22 citationsarXiv

The Stellar Populations and Rest-Frame Colors of Star-Forming Galaxies at

z \approx 8

: Exploring the Impact of Filter Choice and Star Formation History Assumption with JADES2506.02099v1 · Jakob M. Helton, Stacey Alberts, George H. Rieke et al.2025 · 1 citationarXiv

A black hole in a near-pristine galaxy 700 million years after the Big Bang2505.22567v6 · Roberto Maiolino, Hannah Uebler, Francesco D'Eugenio et al.2025 · 28 citationsMon Not R Astron Soc (2026)

Origins of Carbon Dust in a JWST-Observed Primeval Galaxy at $z\sim$6.72505.10701v1 · Ambra Nanni, Michael Romano, Darko Donevski et al.2025 · 0 citationsarXiv

ALMA Observations of [OI]145um and [NII]205um Emission lines from Star-Forming Galaxies at

z\sim7

2504.03831v1 · Yoshinobu Fudamoto, Akio K. Inoue, Rychard Bouwens et al.2025 · 1 citationarXiv

Deciphering the Nature of Virgil: An Obscured AGN Lurking Within an Apparently Normal Lyman-{\alpha} Emitter During Cosmic Reionization2504.01852v2 · Pierluigi Rinaldi, Pablo G. P'erez-Gonz'alez, George H. Rieke et al.2025 · 0 citationsarXiv

Career total: 208 works. 146 are in this corpus.Showing the 50 most recent.

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