Beecroft Institute for Particle Astrophysics and Cosmology

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Euclid preparation

Astronomy & Astrophysics EDP Sciences 631 (2019) a85

Authors:

R Barnett, SJ Warren, DJ Mortlock, J-G Cuby, C Conselice, PC Hewett, CJ Willott, N Auricchio, A Balaguera-Antolínez, M Baldi, S Bardelli, F Bellagamba, R Bender, A Biviano, D Bonino, E Bozzo, E Branchini, M Brescia, J Brinchmann, C Burigana, S Camera, V Capobianco, C Carbone, J Carretero, CS Carvalho, FJ Castander, M Castellano, S Cavuoti, A Cimatti, R Clédassou, G Congedo, L Conversi, Y Copin, L Corcione, J Coupon, HM Courtois, M Cropper, A Da Silva, CAJ Duncan, S Dusini, A Ealet, S Farrens, P Fosalba, S Fotopoulou, N Fourmanoit, M Frailis, M Fumana, S Galeotta, B Garilli, W Gillard, BR Gillis, J Graciá-Carpio, F Grupp, H Hoekstra, F Hormuth, H Israel, K Jahnke, S Kermiche, M Kilbinger, CC Kirkpatrick, T Kitching, R Kohley, B Kubik, M Kunz, H Kurki-Suonio, R Laureijs, S Ligori, PB Lilje, I Lloro, E Maiorano, O Mansutti, O Marggraf, N Martinet, F Marulli, R Massey, N Mauri, E Medinaceli, S Mei, Y Mellier, RB Metcalf, JJ Metge, G Meylan, M Moresco, L Moscardini, E Munari, C Neissner, SM Niemi, T Nutma, C Padilla, S Paltani, F Pasian, P Paykari, WJ Percival, V Pettorino, G Polenta, M Poncet, L Pozzetti, F Raison, A Renzi, J Rhodes, H-W Rix, E Romelli, M Roncarelli, E Rossetti, R Saglia, D Sapone, R Scaramella, P Schneider, V Scottez, A Secroun, S Serrano, G Sirri, L Stanco, F Sureau, P Tallada-Crespí, D Tavagnacco, AN Taylor, M Tenti, I Tereno, R Toledo-Moreo, F Torradeflot, L Valenziano, T Vassallo, Y Wang, A Zacchei, G Zamorani, J Zoubian, E Zucca
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Simulating MOS science on the ELT: Ly$\alpha$ forest tomography

(2019)

Authors:

J Japelj, C Laigle, M Puech, C Pichon, H Rahmani, Y Dubois, JEG Devriendt, P Petitjean, F Hammer, E Gendron, L Kaper, S Morris, N Pirzkal, R Sánchez-Janssen, A Slyz, SD Vergani, Y Yang
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The impact of the connectivity of the cosmic web on the physical properties of galaxies at its nodes

(2019)

Authors:

Katarina Kraljic, Christophe Pichon, Sandrine Codis, Clotilde Laigle, Romeel Davé, Yohan Dubois, Ho Seong Hwang, Dmitri Pogosyan, Stéphane Arnouts, Julien Devriendt, Marcello Musso, Sébastien Peirani, Adrianne Slyz, Marie Treyer
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The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies

Monthly Notices of the Royal Astronomical Society Oxford University Press 491:2 (2019) 2864-2884

Authors:

C Welker, J Bland-Hawthorn, J Van de Sande, C Lagos, P Elahi, D Obreschkow, J Bryant, C Pichon, L Cortese, Richards, SM Croom, M Goodwin, JS Lawrence, S Sweet, A Lopez-Sanchez, A Medling, Owers, Y Dubois, Julien Devriendt

Abstract:

We present the first detection of mass dependent galactic spin alignments with local cosmic filaments with >2σ confidence using IFS kinematics. The 3D network of cosmic filaments is reconstructed on Mpc scales across GAMA fields using the cosmic web extractor DisPerSe. We assign field galaxies from the SAMI survey to their nearest filament segment in 3D and estimate the degree of alignment between SAMI galaxies’ kinematic spin axis and their nearest filament in projection. Low-mass galaxies align their spin with their nearest filament while higher mass counterparts are more likely to display an orthogonal orientation. The stellar transition mass from the first trend to the second is bracketed between 1010.4 M⊙ and 1010.9 M⊙, with hints of an increase with filament scale. Consistent signals are found in the Horizon-AGN cosmological hydrodynamic simulation. This supports a scenario of early angular momentum build-up in vorticity rich quadrants around filaments at low stellar mass followed by progressive flip of spins orthogonal to the cosmic filaments through mergers at high stellar mass. Conversely, we show that dark-matter only simulations post-processed with a semi-analytic model treatment of galaxy formation struggles to reproduce this alignment signal. This suggests that gas physics is key in enhancing the galaxy-filament alignment.
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Scale Invariant Gravity and Black Hole Ringdown

(2019)

Authors:

Pedro G Ferreira, Oliver J Tattersall
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