Beecroft Institute for Particle Astrophysics and Cosmology

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The Euclid mission: status after launch and early operations

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13092 (2024) 130920m-130920m-16

Authors:

R Laureijs, R Vavrek, GD Racca, R Kohley, P Ferruit, V Pettorino, T Bönke, A Calvi, L Gaspar Venancio, L Campos, E Maiorano, O Piersanti, S Prezelus, U Ragnit, P Rosato, C Rosso, H Rozemeijer, A Short, P Strada, D Stramaccioni, M Szafraniec, B Altieri, G Buenadicha, X Dupac, P Gómez Cambronero, K Henares Vilaboa, C Hernandez de la Torre, J Hoar, M Lopez-Caniego Alcarria, P Marcos Arenal, J Martin Fleitas, M Miluzio, A Mora, S Nieto, R Perez Bonilla, P Teodoro Idiago, F Cordero, J Mendes, F Renk, A Rudolph, M Schmidt, J Schwartz, Y Mellier, H Aussel, M Berthé, P Casenove, M Cropper, JC Cuillandre, J Dinis, A Gregorio, K Kuijken, T Maciaszek, L Miller, R Scaramella, M Schirmer, I Tereno, A Zacchei, S Awan, GP Candini, P Liebing, R Nakajima, S Dusini, P Battaglia, E Medinaceli, C Sirignano, I Baldry, C Baugh, F Bernardeau, F Castander, A Cimatti, W Gillard, L Guzzo, H Hoekstra, K Jahnke, T Kitching, E Martin, J Mohr, W Percival, J Rhodes
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Galaxy build-up in the first 1.5 Gyr of cosmic history: insights from the stellar mass function at z ~ 4–9 from JWST NIRCam observations

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 533:2 (2024) 1808-1838

Authors:

Andrea Weibel, Pascal A Oesch, Laia Barrufet, Rashmi Gottumukkala, Richard S Ellis, Paola Santini, John R Weaver, Natalie Allen, Rychard Bouwens, Rebecca AA Bowler, Gabe Brammer, Adam C Carnall, Fergus Cullen, Pratika Dayal, Mark Dickinson, Callum T Donnan, James S Dunlop, Mauro Giavalisco, Norman A Grogin, Garth D Illingworth, Anton M Koekemoer, Ivo Labbe, Danilo Marchesini, Derek J McLeod, Ross J McLure, Rohan P Naidu, Pablo G Pérez-González, Marko Shuntov, Mauro Stefanon, Sune Toft, Mengyuan Xiao
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Galaxy Zoo: Morphologies Based on UKIDSS NIR Imaging for 71,052 Galaxies

Research Notes of the American Astronomical Society American Astronomical Society 8:8 (2024) 198

Authors:

Karen L Masters, Melanie Galloway, Lucy Fortson, Chris J Lintott, Mike Read, Claudia Scarlata, Brooke Simmons, Mike Walmsley, Kyle Willett

Abstract:

We present morphological classifications based on Galaxy Zoo analysis of 71,052 galaxies with imaging from the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS). Galaxies were selected out of the Galaxy Zoo 2 (GZ2) sample, so also have gri imaging from the Sloan Digital Sky Survey. An identical classification tree, and vote weighting/aggregation was applied to both UKIDSS and GZ2 classifications enabling direct comparisons. With this Research Note we provide a public release of the GZ:UKIDSS morphologies and discuss some initial comparisons with GZ2.
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New Horizons for Psi: Studying fundamental fields with numerical relativity

ArXiv 2408.07617 (2024)
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Cosmic shear with small scales: DES-Y3, KiDS-1000 and HSC-DR1

Journal of Cosmology and Astroparticle Physics IOP Publishing 2024:08 (2024) 24

Authors:

Carlos García-García, Matteo Zennaro, Giovanni Aricò, David Alonso, Raul E Angulo

Abstract:

<jats:title>Abstract</jats:title><jats:p>We present a cosmological analysis of the combination of the DES-Y3, KiDS-1000 and HSC-DR1 weak lensing samples under a joint harmonic-space pipeline making use of angular scales down to ℓ<jats:sub>max</jats:sub>=4500, corresponding to significantly smaller scales (δθ ~ 2.4') than those commonly used in cosmological weak lensing studies. We are able to do so by accurately modelling non-linearities and the impact of baryonic effects using<jats:monospace>Baccoemu</jats:monospace>. We find<jats:italic>S</jats:italic><jats:sub>8</jats:sub>≡<jats:italic>σ</jats:italic><jats:sub>8</jats:sub>√(Ω<jats:sub>m</jats:sub>/0.3) = 0.795<jats:sup>+0.015</jats:sup><jats:sub>-0.017</jats:sub>, in relatively good agreement with CMB constraints from<jats:italic>Planck</jats:italic>(less than ~1.8<jats:italic>σ</jats:italic>tension), although we obtain a low value of Ω<jats:sub>m</jats:sub>=0.212<jats:sup>+0.017</jats:sup><jats:sub>-0.032</jats:sub>, in tension with<jats:italic>Planck</jats:italic>at the ~3σ level. We show that this can be recast as an H<jats:sub>0</jats:sub>tension if one parametrises the amplitude of fluctuations and matter abundance in terms of variables without hidden dependence on H<jats:sub>0</jats:sub>. Furthermore, we find that this tension reduces significantly after including a prior on the distance-redshift relationship from BAO data, without worsening the fit. In terms of baryonic effects, we show that failing to model and marginalise over them on scales<jats:italic>ℓ</jats:italic>≲ 2000 does not significantly affect the posterior constraints for DES-Y3 and KiDS-1000, but has a mild effect on deeper samples, such as HSC-DR1. This is in agreement with our ability to only mildly constrain the parameters of the Baryon Correction Model with these data.</jats:p>
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