Laboratoire d'étude de l'Univers et des phénomènes eXtrêmes | LUX

• Pré-publication, Document de travail

One H2 molecule per ten million H-atoms reveals sub-pc scale cold overdensities at z~4

P Noterdaeme, S Balashev, T Berg, S Cristiani, R Cuellar, G Cupani, S Di Stefano, V d'Odorico, C Fian, B Godard, S López, D Milaković, A Trost, L Welsh

We present the detection and analysis of H2 absorption at z = 4.24 towards the bright quasar J0007-5705, observed with the Very Large Telescope as part of the ESPRESSO QUasar Absorption Line Survey (EQUALS). The high resolving power, R~120000, enables the identification of extremely weak H2 lines…

2026. ⟨hal-05507533⟩

• Pré-publication, Document de travail

The cosmic web's Lyman-$α$ glow at $z \approx 2.5$; varying hydrodynamic models, dust, and wide-field, narrow-band imaging detection

Oleksii Sokoliuk, John K Webb, Kenneth M Lanzetta, Michael M Shara, Stefan Gromoll, James S Bolton, Robert F Carswell, Gaspar Galaz, Cédric Ledoux, Gaspare Lo Curto, Alain Smette, David Valls-Gabaud, Anja von der Linden, Frederick M Walter, Joris Witstok

The diffuse glow of the cosmic web in Lyman-$α$ emission has long been predicted, yet remained elusive to direct wide field detection. We present theoretical calculations that, when compared with recent observations made using the Condor Array Telescope in New Mexico reported in Lanzetta et al.…

2026. ⟨hal-05443729⟩

• Article dans une revue

Euclid Quick Data Release (Q1). Extending the quest for little red dots to z<4

L Bisigello, G Rodighiero, S Fotopoulou, F Ricci, K Jahnke, A Feltre, V Allevato, F Shankar, P Cassata, E. Dalla Bontà, G Gandolfi, G Girardi, M Giulietti, A Grazian, C.C Lovell, R Maiolino, T. Matamoro Zatarain, M Mezcua, I Prandoni, D Roberts, W Roster, M Salvato, M Siudek, F Tarsitano, Y Toba, A Vietri, L Wang, G Zamorani, M Baes, S Belladitta, A Nersesian, L Spinoglio, X. Lopez Lopez, N Aghanim, B Altieri, A Amara, S Andreon, N Auricchio, H Aussel, C Baccigalupi, M Baldi, A Balestra, S Bardelli, A Basset, P Battaglia, R Bender, A Biviano, A Bonchi, E Branchini, M Brescia, J Brinchmann, S Camera, G Cañas-Herrera, V Capobianco, C Carbone, J Carretero, S Casas, M Castellano, G Castignani, S Cavuoti, K.C Chambers, A Cimatti, C Colodro-Conde, G Congedo, C.J Conselice, L Conversi, Y Copin, F Courbin, H.M Courtois, M Cropper, A da Silva, H Degaudenzi, G de Lucia, A.M Di Giorgio, C Dolding, H Dole, F Dubath, C.A.J Duncan, X Dupac, S Dusini, A Ealet, S Escoffier, M Farina, R Farinelli, F Faustini, S Ferriol, F Finelli, M Frailis, E Franceschi, S Galeotta, K George, W Gillard, B Gillis, C Giocoli, P Gómez-Alvarez, J Gracia-Carpio, B.R Granett, F Grupp, S Gwyn, S.V.H Haugan, H Hoekstra, W Holmes, I.M Hook, F Hormuth, A Hornstrup, P Hudelot, M Jhabvala, E Keihänen, S Kermiche, A Kiessling, B Kubik, M Kümmel, M Kunz, H Kurki-Suonio, Q Le Boulc'H, A.M.C Le Brun, D Le Mignant, P Liebing, S Ligori, P.B Lilje, V Lindholm, I Lloro, G Mainetti, D Maino, E Maiorano, O Mansutti, S Marcin, O Marggraf, M Martinelli, N Martinet, F Marulli, R Massey, S Maurogordato, E Medinaceli, S Mei, M Melchior, Y Mellier, M Meneghetti, E Merlin, G Meylan, A Mora, M Moresco, L Moscardini, R Nakajima, C Neissner, S.-M Niemi, J.W Nightingale, C Padilla, S Paltani, F Pasian, K Pedersen, W.J Percival, V Pettorino, S Pires, G Polenta, M Poncet, L.A Popa, L Pozzetti, F Raison, R Rebolo, A Renzi, J Rhodes, G Riccio, E Romelli, M Roncarelli, E Rossetti, H.J.A Rottgering, B Rusholme, R Saglia, Z Sakr, D Sapone, B Sartoris, J.A Schewtschenko, M Schirmer, P Schneider, T Schrabback, M Scodeggio, A Secroun, G Seidel, S Serrano, P Simon, C Sirignano, G Sirri, L Stanco, J Steinwagner, P Tallada-Crespí, A.N Taylor, H.I Teplitz, I Tereno, S Toft, R Toledo-Moreo, F Torradeflot, I Tutusaus, L Valenziano, J Valiviita, T Vassallo, G. Verdoes Kleijn, A Veropalumbo, Y Wang, J Weller, A Zacchei, F.M Zerbi, I.A Zinchenko, E Zucca, M Ballardini, M Bolzonella, E Bozzo, C Burigana, R Cabanac, A Cappi, D Di Ferdinando, J.A. Escartin Vigo, L Gabarra, M Huertas-Company, J Martín-Fleitas, S Matthew, M Maturi, N Mauri, A Pezzotta, M Pöntinen, C Porciani, I Risso, V Scottez, M Sereno, M Tenti, M Viel, M Wiesmann, Y Akrami, I.T Andika, S Anselmi, M Archidiacono, F Atrio-Barandela, C Benoist, K Benson, D Bertacca, M Bethermin, A Blanchard, L Blot, M.L Brown, S Bruton, A Calabro, F Caro, C.S Carvalho, T Castro, Y Charles, F Cogato, T Contini, A.R Cooray, O Cucciati, S Davini, F de Paolis, G Desprez, A Díaz-Sánchez, J.J Diaz, S Di Domizio, J.M Diego, A Enia, Y Fang, A.G Ferrari, P.G Ferreira, A Finoguenov, A Fontana, F Fontanot, A Franco, K Ganga, J García-Bellido, T Gasparetto, V Gautard, E Gaztanaga, F Giacomini, F Gianotti, G Gozaliasl, M Guidi, C.M Gutierrez, A Hall, W.G Hartley, S Hemmati, C Hernández-Monteagudo, H Hildebrandt, J Hjorth, J.J.E Kajava, Y Kang, V Kansal, D Karagiannis, K Kiiveri, C.C Kirkpatrick, S Kruk, J Le Graet, L Legrand, M Lembo, F Lepori, G Leroy, G.F Lesci, J Lesgourgues, L Leuzzi, T.I Liaudat, A Loureiro, J Macias-Perez, G Maggio, M Magliocchetti, E.A Magnier, C Mancini, F Mannucci, R Maoli, C.J.A.P Martins, L Maurin, M Miluzio, P Monaco, C Moretti, G Morgante, S Nadathur, K Naidoo, A Navarro-Alsina, S Nesseris, F Passalacqua, K Paterson, L Patrizii, A Pisani, D Potter, S Quai, M Radovich, P.-F Rocci, S Sacquegna, M Sahlén, D.B Sanders, E Sarpa, C Scarlata, J Schaye, A Schneider, D Sciotti, E Sellentin, A Shulevski, L.C Smith, K Tanidis, C Tao, G Testera, R Teyssier, S Tosi, A Troja, M Tucci, C Valieri, A Venhola, D Vergani, G Verza, P Vielzeuf, A Viitanen, N.A Walton, J.R Weaver, E Soubrie, D Scott

Recent James Webb Space Telescope (JWST) observations have revealed a population of sources with a compact morphology and a `v-shaped' continuum, namely blue at rest-frame $λ<4000$A and red at longer wavelengths. The nature of these sources, called `little red dots' (LRDs), is still…

• Article dans une revue

The influence of the 3D Galactic gas structure on cosmic-ray transport and gamma-ray emission

Andrés Ramírez, Gordian Edenhofer, Torsten A Enßlin, Philipp Frank, Philipp Mertsch, Vo Hong Minh Phan, Laurin Söding, Hanieh Zhandinejad, Ralf Kissmann

Cosmic rays (CRs) play a major role in the dynamics of the interstellar medium (ISM). Their interactions and transport ionize, heat, and push the ISM thereby coupling different regions of it. The spatial distribution of CRs depends on the distribution of their sources as well as the ISM…

Astroparticle Physics, 2026, 174, pp.103151. ⟨10.1016/j.astropartphys.2025.103151⟩. ⟨hal-04650443⟩