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Head-to-Toe Measurement of El Gordo: Improved Analysis of the Galaxy Cluster ACT-CL J0102-4915 with New Wide-field Hubble Space Telescope Imaging Data

Astrophysical Journal 923:1 (2021)

Authors:

J Kim, MJ Jee, JP Hughes, M Yoon, K Hyeonghan, F Menanteau, C Sif贸n, L Hovey, P Arunachalam

Abstract:

We present an improved weak-lensing (WL) study of the high-z (z = 0.87) merging galaxy cluster ACT-CL J0102-4915 ("El Gordo") based on new wide-field Hubble Space Telescope imaging data. The new imaging data cover the 鈭3.5 鈭3.5 Mpc region centered on the cluster and enable us to detect WL signals beyond the virial radius, which was not possible in previous studies. We confirm the binary mass structure consisting of the northwestern (NW) and southeastern (SE) subclusters and the 鈭2蟽 dissociation between the SE mass peak and the X-ray cool core. We obtain the mass estimates of the subclusters by simultaneously fitting two Navarro-Frenk-White (NFW) halos without employing mass-concentration relations. The masses are M200cNW = 9.9-2.2+2.1 脳 1014 and M200cSE = 6.5-1.4+1.9 脳 1014 M o藱 for the NW and SE subclusters, respectively. The mass ratio is consistent with our previous WL study but significantly different from the previous strong-lensing results. This discrepancy is attributed to the use of extrapolation in strong-lensing studies because the SE component possesses a higher concentration. By superposing the two best-fit NFW halos, we determine the total mass of El Gordo to be M200c = 2.13-0.23+0.25 脳 1015 M o藱, which is 鈭23% lower than our previous WL result [M 200c = (2.76 卤 0.51) 脳 1015 M o藱]. Our updated mass is a more direct measurement, since we are not extrapolating to R 200c as in all previous studies. The new mass is compatible with the current 螞CDM cosmology.

On cosmological bias due to the magnification of shear and position samples in modern weak lensing analyses

ArXiv 2111.09867 (2021)

Authors:

Christopher AJ Duncan, Joachim Harnois-D茅raps, Lance Miller

Euclid preparation XII. Optimizing the photometric sample of the Euclid survey for galaxy clustering and galaxy-galaxy lensing analyses

ASTRONOMY & ASTROPHYSICS 655 (2021) ARTN A44

Authors:

A Pocino, I Tutusaus, FJ Castander, P Fosalba, M Crocce, A Porredon, S Camera, V Cardone, S Casas, T Kitching, F Lacasa, M Martinelli, A Pourtsidou, Z Sakr, S Andreon, N Auricchio, C Baccigalupi, A Balaguera-Antolinez, M Baldi, A Balestra, S Bardelli, R Bender, A Biviano, C Bodendorf, D Bonino, A Boucaud, E Bozzo, E Branchini, M Brescia, J Brinchmann, C Burigana, R Cabanac, V Capobianco, A Cappi, CS Carvalho, M Castellano, G Castignani, S Cavuoti, A Cimatti, R Cledassou, C Colodro-Conde, G Congedo, CJ Conselice, L Conversi, Y Copin, L Corcione, A Costille, J Coupon, HM Courtois, M Cropper, J-G Cuby, A Da Silva, S de la Torre, D Di Ferdinando, F Dubath, C Duncan, X Dupac, S Dusini, S Farrens, PG Ferreira, I Ferrero, F Finelli, S Fotopoulou, M Frailis, E Franceschi, S Galeotta, B Garilli, W Gillard, B Gillis, C Giocoli, G Gozaliasl, J Gracia-Carpio, F Grupp, L Guzzo, W Holmes, F Hormuth, K Jahnke, E Keihanen, S Kermiche, A Kiessling, CC Kirkpatrick, M Kunz, H Kurki-Suonio, S Ligori, PB Lilje, I Lloro, D Maino, E Maiorano, O Mansutti, O Marggraf, N Martinet, F Marulli, R Massey, S Maurogordato, E Medinaceli, S Mei, M Meneghetti, R Benton Metcalf, G Meylan, M Moresco, B Morin, L Moscardini, E Munari, R Nakajima, C Neissner, RC Nichol, S Niemi, J Nightingale, C Padilla, S Paltani, F Pasian, L Patrizii, K Pedersen, WJ Percival, V Pettorino, S Pires, G Polenta, M Poncet, L Popa, D Potter, L Pozzetti, F Raison, A Renzi, J Rhodes, G Riccio, E Romelli, M Roncarelli, E Rossetti, R Saglia, AG Sanchez, D Sapone, R Scaramella, P Schneider, V Scottez, A Secroun, G Seidel, S Serrano, C Sirignano, G Sirri, L Stanco, F Sureau, AN Taylor, M Tenti, I Tereno, R Teyssier, R Toledo-Moreo, A Tramacere, EA Valentijn, L Valenziano, J Valiviita, T Vassallo, M Viel, Y Wang, N Welikala, L Whittaker, A Zacchei, G Zamorani, J Zoubian, E Zucca, Euclid Collaboration

MIGHTEE: total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields

Monthly Notices of the Royal Astronomical Society Oxford University Press 509:2 (2021) 2150-2168

Authors:

I Heywood, Mj Jarvis, Cl Hale, Ih Whittam, Hl Bester, B Hugo, Js Kenyon, M Prescott, Om Smirnov, C Tasse, Jm Afonso, Pn Best, Jd Collier, Rp Deane, Bs Frank, Mj Hardcastle, K Knowles, N Maddox, Ej Murphy, I Prandoni, Sm Randriamampandry, Mg Santos, S Sekhar, F Tabatabaei, Ar Taylor, K Thorat

Abstract:

MIGHTEE is a galaxy evolution survey using siltaneous radio continuum, spectropolarimetry, and spectral line observations from the South African MeerKAT telescope. When complete, the survey will image 20 deg2 over the COSMOS, E-CDFS, ELAIS-S1, and XMM-Newton Large Scale Structure field (XMM-LSS) extragalactic deep fields with a central frequency of 1284 MHz. These were selected based on the extensive ltiwavelength data sets from numerous existing and forthcoming observational campaigns. Here, we describe and validate the data processing strategy for the total intensity continuum aspect of MIGHTEE, using a single deep pointing in COSMOS (1.6 deg2) and a three-pointing mosaic in XMM-LSS (3.5 deg2). The processing includes the correction of direction-dependent effects, and results in theal noise levels below 2 ${}$Jy beam-1 in both fields, limited in the central regions by classical confusion at 8 arcsec angular resolution, and meeting the survey specifications. We also produce images at 5 arcsec resolution that are 3 times shallower. The resulting image products fo the basis of the Early Science continuum data release for MIGHTEE. From these images we extract catalogues containing 9896 and 20 274 radio components in COSMOS and XMM-LSS, respectively. We also process a close-packed mosaic of 14 additional pointings in COSMOS and use these in conjunction with the Early Science pointing to investigate methods for primary beam correction of broad-band radio images, an analysis that is of relevance to all full-band MeerKAT continuum observations, and wide-field interferometric imaging in general. A public release of the MIGHTEE Early Science continuum data products accompanies this article.

EuCAPT White Paper: Opportunities and Challenges for Theoretical Astroparticle Physics in the Next Decade

ArXiv preprint. White paper of the European Consortium for Astroparticle Theory (EuCAPT). 135 authors, 400 endorsers, 133 pages, 1382 references

Authors:

R. Alves Batista, M. A. Amin, G. Barenboim, N. Bartolo, D. Baumann, A. Bauswein, E. Bellini, D. Benisty, G. Bertone, P. Blasi, C.G. B枚hmer, 沤. Bo拧njak, T. Bringmann, C. Burrage, M. Bustamante, J. Calder贸n Bustillo, C. T. Byrnes, F. Calore, R. Catena, D. G. Cerde帽o, S. S. Cerri, M. Chianese, K. Clough, A. Cole, P. Coloma, A. Coogan, L. Covi, D. Cutting, A.C. Davis, C. de Rham, A. di Matteo, G. Dom猫nech, M. Drewes, T. Dietrich, T. D. P. Edwards, I. Esteban, R. Erdem, C. Evoli, M. Fasiello, S. M. Feeney, R. Z. Ferreira, A. Fialkov, N. Fornengo, S. Gabici, T. Galatyuk, D.Gaggero, D. Grasso, C. Gu茅pin, J. Harz, M. Herrero-Valea, T. Hinderer, N. B. Hogg, D. C. Hooper, F. Iocco, J. Isern, K. Karchev, B. J. Kavanagh, M. Korsmeier, K. Kotera, K. Koyama, B. Krishnan, J. Lesgourgues, J. Levi Said, L. Lombriser, C. S. Lorenz, S. Manconi, M. Mapelli, A. Marcowith, S. B. Markoff, D. J. E. Marsh, M. Martinelli, C.J.A.P. Martins, J. H. Matthews, A. Meli, O. Mena, J. Mifsud, M. M. Miller Bertolami, P. Millington, P. Moesta, K. Nippel, V. Niro, E. O'Connor, F. Oikonomou, C. F. Paganini, G. Pagliaroli, P. Pani, C. Pfrommer, S. Pascoli, L. Pinol, L. Pizzuti, R. A. Porto, A. Pound, F. Quevedo, G. G. Raffelt, A. Raccanelli, E. Ramirez-Ruiz, M. Raveri, S. Renaux-Petel, A. Ricciardone, A. Rida Khalifeh , A. Riotto, R. Roiban, J. Rubio, M. Sahl茅n, N. Sabti, L. Sagunski, N. 艩ar膷evi膰, K. Schmitz, P. Schwaller, T. Schwetz, A. Sedrakian, E. Sellentin, A. Serenelli, P.D. Serpico, E. I. Sfakianakis, S. Shalgar, A. Silvestri, I. Tamborra, K. Tanidis, D. Teresi, A. A. Tokareva, L. Tolos, S. Trojanowski, R. Trotta, C. Uhlemann, F. R. Urban, F. Vernizzi, A. van Vliet, F. L. Villante, A. Vincent, J. Vink, E. Vitagliano, C. Weniger, A. Wickenbrock, W. Winter, S. Zell, M. Zeng

Abstract:

Astroparticle physics is undergoing a profound transformation, due to a series of extraordinary new results, such as the discovery of high-energy cosmic neutrinos with IceCube, the direct detection of gravitational waves with LIGO and Virgo, and many others. This white paper is the result of a collaborative effort that involved hundreds of theoretical astroparticle physicists and cosmologists, under the coordination of the European Consortium for Astroparticle Theory (EuCAPT). Addressed to the whole astroparticle physics community, it explores upcoming theoretical opportunities and challenges for our field of research, with particular emphasis on the possible synergies among different subfields, and the prospects for solving the most fundamental open questions with multi-messenger observations.