Galaxy formation and evolution

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Zapped then Napped? A rapidly quenched, remnant leaker candidate with a steep spectroscopic $\beta_{UV}$ slope at z=8.5

(2025)

Authors:

William M Baker, Francesco D'Eugenio, Roberto Maiolino, Andrew J Bunker, Charlotte Simmonds, Sandro Tacchella, Joris Witstok, Santiago Arribas, Stefano Carniani, Stéphane Charlot, Jacopo Chevallard, Mirko Curti, Emma Curtis-Lake, Gareth C Jones, Nimisha Kumari, Pierluigi Rinaldi, Brant Robertson, Christina C Williams, Chris Willott, Yongda Zhu

A novel Bayesian approach for decomposing the radio emission of quasars: II. Link between quasar radio emission and black hole mass

ArXiv 2501.07629 (2025)

Authors:

B-H Yue, KJ Duncan, PN Best, MI Arnaudova, LK Morabito, JW Petley, HJA Röttgering, S Shenoy, DJB Smith
Details from ArXiV

GA-NIFS: A galaxy-wide outflow in a Compton-thick mini-broad-absorption-line quasar at z=3.5 probed in emission and absorption

Astronomy & Astrophysics EDP Sciences (2025)

Authors:

Michele Perna, Santiago Arribas, Xihan Ji, Cosimo Marconcini, Isabella Lamperti, Elena Bertola, Chiara Circosta, Francesco D'Eugenio, Hannah Ubler, Torsten Böker, Roberto Maiolino, Andrew J Bunker, Stefano Carniani, St'ephane Charlot, Chris J Willott, Giovanni Cresci, Alessandro Marconi, Eleonora Parlanti, Bruno Rodriguez Del Pino, Jan Scholtz, Giacomo Venturi
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Bounding elastic photon-photon scattering at √s ≈ 1 MeV using a laser-plasma platform

Physics Letters B Elsevier 861 (2025) 139247

Authors:

R Watt, B Kettle, E Gerstmayr, B King, A Alejo, S Astbury, C Baird, S Bohlen, M Campbell, C Colgan, D Dannheim, C Gregory, H Harsh, Peter Hatfield, J Hinojosa, D Hollatz, Y Katzir, J Morton, Cd Murphy, A Nurnberg, J Osterhoff, G Pérez-Callejo, K Põder, Pp Rajeev, C Roedel, F Roeder, Fc Salgado, Gm Samarin, G Sarri, A Seidel, C Spindloe, S Steinke, Mjv Streeter, Agr Thomas, C Underwood, W Wu, M Zepf, Steven Rose, Spd Mangles

Abstract:

We report on a direct search for elastic photon-photon scattering using x-ray and 𝛾 photons from a laser-plasma based experiment. A 𝛾 photon beam produced by a laser wak­field accelerator provided a broadband 𝛾 spectrum extending to above 𝐸𝛾 = 200 MeV. These were collided with a dense x-ray field produced by the emission from a laser heated germanium foil at 𝐸𝑥 ≈ 1.4 keV, corresponding to an invariant mass of √𝑠 = 1.22 ± 0.22 MeV. In these asymmetric collisions elastic scattering removes one x-ray and one high-energy 𝛾 photon and outputs two lower energy 𝛾 photons. No changes in the 𝛾 photon spectrum were observed as a result of the collisions allowing us to place a 95% upper bound on the cross section of 1.5 × 1015 μb. Although far from the QED prediction, this represents the lowest upper limit obtained so far for √𝑠 ≲ 1 MeV.
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WISDOM Project -- XXII. A 5% precision CO-dynamical supermassive black hole mass measurement in the galaxy NGC 383

(2025)

Authors:

Hengyue Zhang, Martin Bureau, Ilaria Ruffa, Michele Cappellari, Timothy A Davis, Pandora Dominiak, Jacob S Elford, Satoru Iguchi, Federico Lelli, Marc Sarzi, Thomas G Williams
Details from ArXiV