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Rohan Varadaraj

Alberto Torralba Torregrosa

Gauri Kotiwale

Ivan Kramarenko

Claudia Di Cesare

Sara Mascia

Edoardo Iani

Benjamín Navarrete

Jorryt Matthee

78 Publications

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2026 | Epub ahead of print | Journal Article | IST-REx-ID: 20975

Heintz KE, Bennett JS, Oesch PA, Sneppen A, Rennehan D, Pollock CL, Witstok J, Smit R, Vejlgaard S, Terp C, Koca US, Brammer GB, Finlator K, Hayes MJ, Sijacki D, Naidu RP, Matthee JJ, Valentino F, Tanvir NR, Jakobsson P, Laursen P, Watson DJ, Davé R, Keating LC, Covelo-Paz A. 2026. A dense web of neutral gas in a galaxy proto-cluster post-reionization. Nature Astronomy.

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Chang, S. J., Gronke, M., Matthee, J. J., & Mason, C. (2026). Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf2131

[Published Version] View | Files available | DOI | arXiv

Torralba Torregrosa, A., Matthee, J. J., Pezzulli, G., Urrutia, T., Gronke, M., Mascia, S., … Kotiwale, G. (2026). A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth. Astronomy and Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202555596

[Published Version] View | Files available | DOI | arXiv

Kotiwale, G., Matthee, J. J., Kashino, D., Vijayan, A. P., Torralba Torregrosa, A., Di Cesare, C., … Sobral, D. (2026). Rapid, out-of-equilibrium metal enrichment indicated by a flat mass-metallicity relation at z ∼ 6 from NIRCam grism spectroscopy. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202556597

[Published Version] View | Files available | DOI | arXiv

Naidu RP, Oesch PA, Brammer G, Weibel A, Li Y, Matthee JJ, Chisholm J, Pollock CL, Heintz KE, Johnson BD, Shen X, Hviding RE, Leja J, Tacchella S, Ganguly A, Witten C, Atek H, Belli S, Bose S, Bouwens R, Dayal P, Decarli R, De Graaff A, Fudamoto Y, Giovinazzo E, Greene JE, Illingworth G, Inoue AK, Kane SG, Labbe I, Leonova E, Marques-Chaves R, Meyer RA, Nelson EJ, Roberts-Borsani G, Schaerer D, Simcoe RA, Stefanon M, Sugahara Y, Toft S, Van Der Wel A, Van Dokkum P, Walter F, Watson D, Weaver JR, Whitaker KE. 2026. A cosmic miracle: A remarkably luminous galaxy at zspec = 14.44 confirmed with JWST. The Open Journal of Astrophysics. 9.

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2026 | Published | Journal Article | IST-REx-ID: 21371

Matthee, J. J. (2026). Black holes disguised as little red dots. Science. AAAS. https://doi.org/10.1126/science.adz8603

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2026 | Published | Journal Article | IST-REx-ID: 21380 |

Giménez-Alcázar A, Amorín R, Vílchez JM, Hernán-Caballero A, González-Otero M, Arroyo-Polonio A, Iglesias-Páramo J, Lumbreras-Calle A, Fernández-Ontiveros JA, López-Sanjuan C, Bonatto L, González Delgado RM, Kehrig C, Torralba Torregrosa A, Rahna PT, Jiménez-Teja Y, Márquez I, Breda I, Álvarez-Candal A, Abramo R, Alcaniz J, Benitez N, Bonoli S, Carneiro S, Cenarro J, Cristóbal-Hornillos D, Dupke R, Ederoclite A, Hernández-Monteagudo C, Marín-Franch A, Mendes de Oliveira C, Moles M, Sodré L, Taylor K, Varela J, Vázquez Ramió H. 2026. J-PAS: First identification, physical properties, and ionization efficiency of extreme emission line galaxies. Astronomy & Astrophysics. 706, A261.

[Published Version] View | Files available | DOI | arXiv

Torralba Torregrosa A, Matthee JJ, Pezzulli G, Naidu RP, Ishikawa Y, Brammer GB, Chang SJ, Chisholm J, De Graaff A, D’Eugenio F, Di Cesare C, Eilers AC, Greene JE, Gronke M, Iani E, Kokorev V, Kotiwale G, Kramarenko I, Ma Y, Mascia S, Navarrete B, Nelson E, Oesch P, Simcoe RA, Wuyts S. 2026. The warm outer layer of a little red dot as the source of [Fe ii] and collisional Balmer lines with scattering wings. Astronomy & Astrophysics. 707, A75.

[Published Version] View | Files available | DOI | arXiv

Di Cesare, C., Matthee, J. J., Naidu, R. P., Torralba, A., Kotiwale, G., Kramarenko, I., … Tacchella, S. (2026). The slope and scatter of the star-forming main sequence at z ∼ 5: Reconciling observations with simulations. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202557790

[Published Version] View | Files available | DOI | arXiv

Kramarenko, I., Rosdahl, J., Blaizot, J., Matthee, J. J., Katz, H., & Di Cesare, C. (2026). H α as a tracer of star formation in the SPHINX cosmological simulations. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202557114

[Published Version] View | Files available | DOI | arXiv

2026 | Published | Journal Article | IST-REx-ID: 21709 |

Hviding, R. E., De Graaff, A., Liu, H., Goulding, A. D., Ma, Y., Greene, J. E., … Wang, B. (2026). The X-ray dot: Exotic dust or a late-stage Little Red Dot? The Astrophysical Journal Letters. IOP Publishing. https://doi.org/10.3847/2041-8213/ae4c88

[Published Version] View | Files available | DOI | arXiv

2026 | Published | Journal Article | IST-REx-ID: 21710 |

Papovich C, Cole JW, Hu W, Finkelstein SL, Shen L, Arrabal Haro P, Amorín RO, Backhaus BE, Bagley MB, Bhatawdekar R, Calabrò A, Carnall AC, Cleri NJ, Daddi E, Dickinson M, Grogin NA, Holwerda BW, Jaskot AE, Koekemoer AM, Llerena M, Lucas RA, Mascia S, Pacucci F, Pentericci L, Pérez-González PG, Pirzkal N, Raghunathan S, Seillé LM, Somerville RS, Yung LYA. 2026. Galaxies in the epoch of reionization are all bark and no bite-plenty of ionizing photons, low escape fractions. The Astrophysical Journal. 1000(1), 111.

[Published Version] View | Files available | DOI | arXiv

Greene JE, Setton DJ, Furtak LJ, Naidu RP, Volonteri M, Dayal P, Labbe I, Van Dokkum P, Bezanson R, Brammer G, Cutler SE, Glazebrook K, De Graaff A, Hirschmann M, Hviding RE, Kokorev V, Leja J, Liu H, Ma Y, Matthee JJ, Nanayakkara T, Oesch PA, Pan R, Price SH, Spilker JS, Wang B, Weaver JR, Whitaker KE, Williams CC, Zitrin A. 2026. What you see is what you get: Empirically measured bolometric luminosities of Little Red Dots. The Astrophysical Journal. 996(2), 129.

[Published Version] View | Files available | DOI | arXiv

Baggen, J. F. W., Scoggins, M. T., Van Dokkum, P., Haiman, Z., Torralba Torregrosa, A., & Matthee, J. J. (2026). Connecting the dots: UV-bright companions of Little Red Dots as Lyman–Werner sources enabling direct-collapse Black Hole formation. The Astrophysical Journal Letters. IOP Publishing. https://doi.org/10.3847/2041-8213/ae58a5

[Published Version] View | Files available | DOI | arXiv

Wang, B., Leja, J., Katz, H., Inayoshi, K., Cleri, N. J., De Graaff, A., … Nelson, E. J. (2026). The missing hard photons of Little Red Dots: Their incident ionizing spectra resemble massive stars. The Astrophysical Journal. IOP Publishing. https://doi.org/10.3847/1538-4357/ae5bab

[Published Version] View | Files available | DOI | arXiv

Roberts-Borsani G, Oesch PA, Ellis R, Weibel A, Giovinazzo E, Bouwens R, Dayal P, Fontana A, Heintz KE, Matthee JJ, Meyer RA, Pentericci L, Shapley A, Tacchella S, Treu T, Walter F, Atek H, Bose S, Castellano M, Fudamoto Y, Morishita T, Naidu RP, Sanders RL, van der Wel A. 2026. JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway. Monthly Notices of the Royal Astronomical Society. 548(3), stag701.

[Published Version] View | Files available | DOI | arXiv

2025 | Published | Journal Article | IST-REx-ID: 18631 |

De Graaff A, Setton DJ, Brammer G, Cutler S, Suess KA, Labbé I, Leja J, Weibel A, Maseda MV, Whitaker KE, Bezanson R, Boogaard LA, Cleri NJ, De Lucia G, Franx M, Greene JE, Hirschmann M, Matthee JJ, Mcconachie I, Naidu RP, Oesch PA, Price SH, Rix HW, Valentino F, Wang B, Williams CC. 2025. Efficient formation of a massive quiescent galaxy at redshift 4.9. Nature Astronomy. 9, 280–292.

2025 | Published | Journal Article | IST-REx-ID: 19784 |

de Graaff A, Brammer G, Weibel A, Lewis Z, Maseda MV, Oesch PA, Bezanson R, Boogaard LA, Cleri NJ, Cooper OR, Gottumukkala R, Greene JE, Hirschmann M, Hviding RE, Katz H, Labbé I, Leja J, Matthee JJ, McConachie I, Miller TB, Naidu RP, Price SH, Rix H-W, Setton DJ, Suess KA, Wang B, Whitaker KE, Williams CC. 2025. RUBIES: A complete census of the bright and red distant universe with JWST/NIRSpec. Astronomy & Astrophysics. 697, A189.

[Published Version] View | Files available | DOI | WoS

2025 | Published | Journal Article | IST-REx-ID: 19845 |

Östlin G, Pérez-González PG, Melinder J, Gillman S, Iani E, Costantin L, Boogaard LA, Rinaldi P, Colina L, Nørgaard-Nielsen HU, Dicken D, Greve TR, Wright G, Alonso-Herrero A, Álvarez-Márquez J, Annunziatella M, Bik A, Bosman SEI, Caputi KI, Gomez AC, Eckart A, Garcia-Marin M, Hjorth J, Ilbert O, Jermann I, Kendrew S, Labiano A, Langeroodi D, Le Fevre O, Libralato M, Meyer RA, Moutard T, Peissker F, Pye JP, Tikkanen TV, Topinka M, Walter F, Ward M, Van Der Werf P, Van Dishoeck EF, Güdel M, Henning T, Lagage PO, Ray TP, Vandenbussche B. 2025. MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field: Survey description and early results for the galaxy population detected at 5.6 µm. Astronomy & Astrophysics. 696, A57.

[Published Version] View | Files available | DOI | WoS | arXiv

2025 | Published | Journal Article | IST-REx-ID: 19855 |

Gazagnes, S., Chisholm, J., Endsley, R., Berg, D. A., Leclercq, F., Jurlin, N., … Schaerer, D. (2025). A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf768

[Published Version] View | Files available | DOI | WoS | arXiv

Matthee Group

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Matthee Group

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78 Publications

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