Search Results for author: H. Hoekstra

Found 7 papers, 2 papers with code

Euclid: Effect of sample covariance on the number counts of galaxy clusters

no code implementations17 Feb 2021 A. Fumagalli, A. Saro, S. Borgani, T. Castro, M. Costanzi, P. Monaco, E. Munari, E. Sefusatti, A. Amara, N. Auricchio, A. Balestra, C. Bodendorf, D. Bonino, E. Branchini, J. Brinchmann, V. Capobianco, C. Carbone, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, C. J. Conselice, L. Corcione, A. Costille, M. Cropper, H. Degaudenzi, M. Douspis, F. Dubath, S. Dusini, A. Ealet, P. Fosalba, E. Franceschi, P. Franzetti, M. Fumana, B. Garilli, C. Giocoli, F. Grupp, L. Guzzo, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, K. Jahnke, A. Kiessling, M. Kilbinger, T. Kitching, M. Kümmel, M. Kunz, H. Kurki-Suonio, R. Laureijs, P. B. Lilje, I. Lloro, E. Maiorano, O. Marggraf, K. Markovic, R. Massey, M. Meneghetti, G. Meylan, L. Moscardini, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, V. Pettorino, S. Pires, M. Poncet, L. Popa, L. Pozzetti, F. Raison, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, R. Scaramella, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, A. N. Taylor, I. Tereno, R. Toledo-Moreo, E. A. Valentijn, L. Valenziano, Y. Wang, J. Weller, G. Zamorani, J. Zoubian, M. Brescia, G. Congedo, L. Conversi, S. Mei, M. Moresco, T. Vassallo

Then, we use such covariance to define the likelihood function that better extracts cosmological information from cluster number counts at the level of precision that will be reached by the future Euclid photometric catalogs of galaxy clusters.

Cosmology and Nongalactic Astrophysics

The mass-size relation of galaxy clusters

no code implementations2 Dec 2020 O. Contigiani, Y. M. Bahé, H. Hoekstra

The outskirts of accreting dark matter haloes exhibit a sudden drop in density delimiting their multi-stream region.

Cosmology and Nongalactic Astrophysics

The PAU Survey: Photometric redshifts using transfer learning from simulations

no code implementations16 Apr 2020 M. Eriksen, A. Alarcon, L. Cabayol, J. Carretero, R. Casas, F. J. Castander, J. De Vicente, E. Fernandez, J. Garcia-Bellido, E. Gaztanaga, H. Hildebrandt, H. Hoekstra, B. Joachimi, R. Miquel, C. Padilla, E. Sanchez, I. Sevilla-Noarbe, P. Tallada

In this paper we introduce the \textsc{Deepz} deep learning photometric redshift (photo-$z$) code.

Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics

Euclid preparation: VII. Forecast validation for Euclid cosmological probes

2 code implementations21 Oct 2019 Euclid Collaboration, A. Blanchard, S. Camera, C. Carbone, V. F. Cardone, S. Casas, S. Ilić, M. Kilbinger, T. Kitching, M. Kunz, F. Lacasa, E. Linder, E. Majerotto, K. Markovič, M. Martinelli, V. Pettorino, A. Pourtsidou, Z. Sakr, A. G. Sánchez, D. Sapone, I. Tutusaus, S. Yahia-Cherif, V. Yankelevich, S. Andreon, H. Aussel, A. Balaguera-Antolínez, M. Baldi, S. Bardelli, R. Bender, A. Biviano, D. Bonino, A. Boucaud, E. Bozzo, E. Branchini, S. Brau-Nogue, M. Brescia, J. Brinchmann, C. Burigana, R. Cabanac, V. Capobianco, A. Cappi, J. Carretero, C. S. Carvalho, R. Casas, F. J. Castander, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, C. Colodro-Conde, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, J. Coupon, H. M. Courtois, M. Cropper, A. Da Silva, S. de la Torre, D. Di Ferdinando, F. Dubath, F. Ducret, C. A. J. Duncan, X. Dupac, S. Dusini, G. Fabbian, M. Fabricius, S. Farrens, P. Fosalba, S. Fotopoulou, N. Fourmanoit, M. Frailis, E. Franceschi, P. Franzetti, M. Fumana, S. Galeotta, W. Gillard, B. Gillis, C. Giocoli, P. Gómez-Alvarez, J. Graciá-Carpio, F. Grupp, L. Guzzo, H. Hoekstra, F. Hormuth, H. Israel, K. Jahnke, E. Keihanen, S. Kermiche, C. C. Kirkpatrick, R. Kohley, B. Kubik, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, D. Maino, E. Maiorano, O. Marggraf, N. Martinet, F. Marulli, R. Massey, E. Medinaceli, S. Mei, Y. Mellier, B. Metcalf, J. J. Metge, G. Meylan, M. Moresco, L. Moscardini, E. Munari, R. C. Nichol, S. Niemi, A. A. Nucita, C. Padilla, S. Paltani, F. Pasian, W. J. Percival, S. Pires, G. Polenta, M. Poncet, L. Pozzetti, G. D. Racca, F. Raison, A. Renzi, J. Rhodes, E. Romelli, M. Roncarelli, E. Rossetti, R. Saglia, P. Schneider, V. Scottez, A. Secroun, G. Sirri, L. Stanco, J. -L. Starck, F. Sureau, P. Tallada-Crespí, D. Tavagnacco, A. N. Taylor, M. Tenti, I. Tereno, R. Toledo-Moreo, F. Torradeflot, L. Valenziano, T. Vassallo, G. A. Verdoes Kleijn, M. Viel, Y. Wang, A. Zacchei, J. Zoubian, E. Zucca

We present new cosmological forecasts for Euclid.

Cosmology and Nongalactic Astrophysics

KiDS+VIKING-450 and DES-Y1 combined: Cosmology with cosmic shear

1 code implementation21 Jun 2019 S. Joudaki, H. Hildebrandt, D. Traykova, N. E. Chisari, C. Heymans, A. Kannawadi, K. Kuijken, A. H. Wright, M. Asgari, T. Erben, H. Hoekstra, B. Joachimi, L. Miller, T. Tröster, J. L. van den Busch

We present a combined tomographic weak gravitational lensing analysis of the Kilo Degree Survey (KV450) and the Dark Energy Survey (DES-Y1).

Cosmology and Nongalactic Astrophysics

Photometric redshifts for the Kilo-Degree Survey. Machine-learning analysis with artificial neural networks

no code implementations13 Sep 2017 M. Bilicki, H. Hoekstra, M. J. I. Brown, V. Amaro, C. Blake, S. Cavuoti, J. T. A. de Jong, C. Georgiou, H. Hildebrandt, C. Wolf, A. Amon, M. Brescia, S. Brough, M. V. Costa-Duarte, T. Erben, K. Glazebrook, A. Grado, C. Heymans, T. Jarrett, S. Joudaki, K. Kuijken, G. Longo, N. Napolitano, D. Parkinson, C. Vellucci, G. A. Verdoes Kleijn, L. Wang

The second dataset, optimized for low-redshift studies such as galaxy-galaxy lensing, is limited to r<20, and provides photo-zs of much better quality than in the full-depth case thanks to incorporating optical magnitudes, colours, and sizes in the GAMA-calibrated photo-z derivation.

Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics

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