Finn forfatter "Winther, Hans Arnold"

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  • Chameleon model with field-dependent couplings 
    Winther, Hans Arnold (Master thesis / Masteroppgave, 2010)
    We investigate scalar-field theories with a field-dependent coupling to matter and show the existence of a chameleon mechanism. The thin-shell solutions for a spherical body are found, and used to investigate the consequences ...
  • Collapse of spherical overdensities in superfluid models of dark matter 
    Hartman, Stian; Winther, Hans Arnold; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aims. We intend to understand cosmological structure formation within the framework of superfluid models of dark matter with finite temperatures. Of particular interest is the evolution of small-scale structures where the ...
  • Cosmological measurements from void-galaxy and galaxy-galaxy clustering in the Sloan Digital Sky Survey 
    Woodfinden, Alex; Percival, Will J.; Nadathur, Seshadri; Winther, Hans Arnold; Fraser, T.S.; Massara, Elena; Paillas, Enrique; Radinovic, Sladana (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • Cosmological Probes of Modified Gravity 
    Winther, Hans Arnold (Doctoral thesis / Doktoravhandling, 2013)
  • Cosmological simulations of self-interacting Bose-Einstein condensate dark matter 
    Hartman, Stian Thomas Heimdal; Winther, Hans Arnold; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Fully 3D cosmological simulations of scalar field dark matter with self-interactions, also known as Bose-Einstein condensate dark matter, are performed using a set of effective hydrodynamic equations. These are derived ...
  • Cosmological supersymmetric model of dark energy 
    Brax, P; Davis, A.-C.; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Recently, a supersymmetric model of dark energy coupled to cold dark matter, the supersymmetron, has been proposed. In the absence of cold dark matter, the supersymmetron field converges to a supersymmetric minimum with a ...
  • Dark matter haloes in modified gravity and dark energy: interaction rate, small- and large-scale alignment 
    L'Huillier, Benjamin; Winther, Hans Arnold; Mota, David; Park, Changbom; Kim, Juhan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We study the properties of dark matter haloes in a wide range of modified gravity models, namely, f(R), DGP and interacting dark energy models. We study the effects of modified gravity and dark energy on the internal ...
  • The dynamics of the Local Group as a probe of dark energy and modified gravity 
    Carlesi, Edoardo; Mota, David; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    In this work, we study the dynamics of the Local Group (LG) within the context of cosmological models beyond General Relativity (GR). Using observable kinematic quantities to identify candidate pairs, we build up samples ...
  • Emulators for the nonlinear matter power spectrum beyond ΛCDM 
    Winther, Hans Arnold; Casas, Santiago; Baldi, Marco; Koyama, Kazuya; Li, Baojiu; Lombriser, Lucas; Zhao, Gong-Bo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Accurate predictions for the nonlinear matter power spectrum are needed to confront theory with observations in current and near future weak-lensing and galaxy clustering surveys. We propose a computationally cheap method ...
  • Euclid: Cosmology forecasts from the void-galaxy cross-correlation function with reconstruction 
    Radinovic, Sladana; Nadathur, S.; Winther, Hans Arnold; Percival, W.J.; Woodfinden, A.; Massara, E.; Paillas, E.; Contarini, S.; Hamaus, N.; Kovacs, A.; Pisani, A.; Verza, G.; Aubert, M.; Amara, A.; Auricchio, N.; Baldi, M.; Bonino, D.; Branchini, E.; Brescia, Massimo; Camera, S.; Capobianco, V.; Carbone, C.; Cardone, V.F.; Carretero, J.; Castellano, M.; Cavuoti, Stefano; Cimatti, A.; Cledassou, R.; Congedo, G.; Conversi, L.; Copin, Y.; Corcione, L.; Courbin, F.; Da Silva, A.; Douspis, M.; Dubath, F.; Dupac, X.; Farrens, S.; Ferriol, S.; Fosalba, P.; Frailis, M.; Franceschi, E.; Fumana, M.; Galeotta, S.; Garilli, B.; Gillard, W.; Gillis, B.; Giocoli, C.; Grazian, A.; Grupp, F.; Haugan, Stein Vidar Hagfors; Holmes, W.; Hornstrup, A.; Jahnke, K.; Kümmel, M.; Kiessling, A.; Kilbinger, M.; Kitching, T.; Kurki-Suonio, Hannu; Ligori, S.; Lilje, Per Barth; Lloro, I.; Maiorano, E.; Mansutti, O.; Marggraf, O.; Markovic, K.; Marulli, F.; Massey, Richard; Mei, S.; Melchior, M.; Mellier, Y.; Meneghetti, M.; Merlin, E.; Meylan, G.; Moresco, M.; Moscardini, L.; Niemi, S.-M.; Nightingale, J.W.; Nutma, T.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, K.; Pettorino, V.; Pires, S.; Polenta, G.; Poncet, M.; Popa, L.A.; Pozzetti, L.; Raison, F.; Renzi, A.; Rhodes, J.; Riccio, G.; Romelli, E.; Roncarelli, M.; Rosset, C.; Saglia, R.; Sapone, D.; Sartoris, B.; Schneider, P.; Secroun, A.; Seidel, G.; Serrano, S.; Sirignano, C.; Sirri, G.; Stanco, L.; Starck, J.-L.; Surace, C.; Tallada-Crespí, P.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Tutusaus, I.; Valentijn, E.A.; Valenziano, L.; Vassallo, T.; Wang, Y.; Weller, J.; Zamorani, G.; Zoubian, J.; Scottez, V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We have investigated the cosmological constraints that can be expected from measurement of the cross-correlation of galaxies with cosmic voids identified in the Euclid spectroscopic survey, which will include spectroscopic ...
  • Euclid: Forecasts from redshift-space distortions and the Alcock-Paczynski test with cosmic voids 
    Hamaus, Nico; Aubert, M.; Pisani, Alice; Contarini, S.; Verza, G.; Cousinou, M.-C.; Escoffier, S.; Hawken, A.; Lavaux, G.; Pollina, G.; Wandelt, B.D.; Weller, J.; Bonici, M.; Carbone, C.; Guzzo, L.; Kovacs, A.; Marulli, F.; Massara, E.; Moscardini, L.; Ntelis, P.; Percival, W.J.; Radinovic, Sladana; Sahlén, M.; Sakr, Z.; Sánchez, A.G.; Winther, Hans Arnold; Auricchio, N.; Awan, S.; Bender, R.; Bodendorf, C.; Bonino, D.; Branchini, E.; Brescia, Massimo; Brinchmann, Jarle; Capobianco, V.; Carretero, J.; Castander, F.J.; Castellano, M.; Cavuoti, Stefano; Cimatti, A.; Cledassou, R.; Congedo, G.; Conversi, L.; Copin, Y.; Corcione, L.; Cropper, M.; Da Silva, A.; Degaudenzi, H.; Douspis, M.; Dubath, F.; Duncan, C.A.J.; Dupac, X.; Dusini, S.; Ealet, A.; Ferriol, S.; Fosalba, P.; Frailis, M.; Franceschi, E.; Franzetti, P.; Fumana, M.; Garilli, B.; Gillis, B.; Giocoli, C.; Grazian, A.; Grupp, F.; Haugan, Stein Vidar Hagfors; Holmes, W.; Hormuth, F.; Jahnke, K.; Kermiche, S.; Kiessling, A.; Kilbinger, M.; Kitching, T.; Kümmel, M.; Kunz, M.; Kurki-Suonio, Hannu; Ligori, S.; Lilje, Per Barth; Lloro, I.; Maiorano, E.; Marggraf, O.; Markovic, K.; Massey, Richard; Maurogordato, S.; Melchior, M.; Meneghetti, M.; Meylan, G.; Moresco, M.; Munari, E.; Niemi, S.M.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, K.; Pettorino, V.; Pires, S.; Poncet, M.; Popa, L.; Pozzetti, L.; Rebolo, R.; Rhodes, J.; Rix, H.; Roncarelli, M.; Rossetti, E.; Saglia, R.; Schneider, P.; Secroun, A.; Seidel, G.; Serrano, S.; Sirignano, C.; Sirri, G.; Starck, J.-L.; Tallada-Crespí, P.; Tavagnacco, D.; Taylor, A.N.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Valentijn, E.A.; Valenziano, L.; Wang, Y.; Welikala, N.; Zamorani, G.; Zoubian, J.; Andreon, S.; Baldi, M.; Camera, S.; Mei, S.; Neissner, C.; Romelli, E. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Euclid is poised to survey galaxies across a cosmological volume of unprecedented size, providing observations of more than a billion objects distributed over a third of the full sky. Approximately 20 million of these ...
  • Euclid: modelling massive neutrinos in cosmology - a code comparison 
    Adamek, J.; Angulo, R. E.; Arnold, C.; Baldi, Marco; Biagetti, M.; Bose, B.; Carbone, C.; Castro, T.; Dakin, J.; Dolag, K.; Elbers, W.; Fidler, C.; Giocoli, C.; Hannestad, Steen; Hassani, Farbod; Hernández-Aguayo, César; Koyama, K.; Li, B.; Mauland-Hus, Renate; Monaco, P.; Moretti, C.; Mota, David; Partmann, C.; Parimbelli, G.; Potter, D.; Schneider, A.; Schulz, S.; Smith, R.E.; Springel, Volker; Stadel, J.; Tram, T.; Viel, Matteo; Villaescuso-Navarro, F.; Winther, Hans Arnold; Wright, B.S.; Zennaro, M.; Aghanim, Nabila; Amendola, Luca; Auricchio, N.; Bonino, D.; Branchini, E.; Brescia, M.; Camera, S.; Capobianco, V.; Cardone, V. F.; Carretero, J.; Castander, Francisco Javier; Castellano, M.; Cavuoti, S.; Cimatti, Andrea; Clédassou, Rodolphe; Congedo, G.; Conversi, L.; Copin, Y.; Da Silva, A.; Degaudenzi, H.; Douspis, M.; Dubath, F.; Duncan, C.A.J.; Dupac, X.; Dusini, S.; Farrens, S.; Ferriol, S.; Fosalba, P.; Frailis, M.; Franceschi, E.; Galeotta, S.; Garilli, B.; Gillard, W.; Gillis, B.; Grazian, A.; Haugan, Stein Vidar Hagfors; Holmes, W.; Hornstrup, Allan; Jahnke, Knud; Kermiche, S.; Kiessling, A.; Kilbinger, M.; Kitching, T.; Kunz, Martin; Kurki-Suonio, Hannu; Lilje, Per Barth; Lloro, I.; Mansutti, O.; Marggraf, O.; Marulli, F.; Massey, R.; Medinaceli, E.; Meneghetti, M.; Munari, E.; Niemi, S.-M.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, Kristian; Percival, Will J.; Pettorino, V.; Polenta, G.; Poncet, M.; Popa, L.A.; Raison, F.; Rebolo, Rafael; Renzi, A.; Rhodes, Jason D.; Riccio, G.; Romelli, E.; Roncarelli, M.; Saglia, R.; Sapone, D.; Sartoris, B.; Schneider, Peter; Schrabback, T.; Secroun, A.; Seidel, G.; Sirignano, C.; Sirri, G.; Stanco, L.; Starck, J.-L.; Tallada-Crespí, P.; Taylor, A. N.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Tutusaus, I.; Valenziano, L.; Vassallo, T.; Wang, Y.; Weller, Jochen; Zacchei, Andrea; Zamorani, G.; Zoubian, J.; Fabbian, G.; Scottez, V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The measurement of the absolute neutrino mass scale from cosmological large-scale clustering data is one of the key science goals of the Euclid mission. Such a measurement relies on precise modelling of the impact of ...
  • Euclid: The search for primordial features 
    Ballardini, M.; Akrami, Y.; Finelli, F.; Karagiannis, D.; Li, Baojiu; Li, Y.; Sakr, Z.; Sapone, D.; Achúcarro, A.; Baldi, M.; Bartolo, N.; Cañas-Herrera, G.; Casas, S.; Murgia, R.; Winther, Hans Arnold; Viel, M.; Andrews, A.; Jasche, J.; Lavaux, G.; Hazra, D.K.; Paoletti, D.; Väliviita, Jussi-Pekka; Amara, A.; Andreon, S.; Auricchio, N.; Battaglia, P.; Bonino, D.; Branchini, E.; Brescia, Massimo; Brinchmann, J.; Camera, S.; Capobianco, V.; Carbone, C.; Carretero, J.; Castellano, M.; Cavuoti, Stefano; Cimatti, A.; Congedo, G.; Conversi, L.; Copin, Y.; Corcione, L.; Courbin, F.; Courtois, H.M.; Da Silva, A.; Degaudenzi, H.; Dubath, F.; Dupac, X.; Farina, M.; Farrens, S.; Frailis, M.; Franceschi, E.; Fumana, M.; Galeotta, S.; Gillis, B.; Giocoli, C.; Grazian, A.; Grupp, F.; Haugan, Stein Vidar Hagfors; Holmes, W.; Hormuth, F.; Hornstrup, A.; Hudelot, P.; Jahnke, K.; Kermiche, S.; Kiessling, A.; Kunz, M.; Kurki-Suonio, Hannu; Lilje, Per Barth; Lindholm, Valtteri; Lloro, I.; Maiorano, E.; Mansutti, O.; Marggraf, O.; Martinet, N.; Marulli, F.; Massey, Richard; Medinaceli, E.; Mei, S.; Mellier, Y.; Meneghetti, M.; Merlin, E.; Meylan, G.; Moresco, M.; Moscardini, L.; Munari, E.; Niemi, S.-M.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, K.; Percival, W.J.; Pettorino, V.; Pires, S.; Polenta, G.; Poncet, M.; Popa, L.A.; Pozzetti, L.; Raison, F.; Renzi, A.; Rhodes, J.; Riccio, G.; Romelli, E.; Roncarelli, M.; Saglia, R.; Sartoris, B.; Schrabback, T.; Secroun, A.; Seidel, G.; Serrano, S.; Sirignano, C.; Sirri, G.; Stanco, L.; Starck, J.-L.; Surace, C.; Tallada-Crespí, P.; Taylor, A.N.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Tutusaus, I.; Valentijn, E.A.; Valenziano, L.; Vassallo, T.; Veropalumbo, A.; Wang, Y.; Weller, J.; Zamorani, G.; Zoubian, J.; Scottez, V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
  • Halo velocity profiles in screened modified gravity theories 
    Grönke, Max Balthasar; Llinares, Claudio; Mota, David; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Screened modified gravity predicts potentially large signatures in the peculiar velocity field that makes it an interesting probe to test gravity on cosmological scales. We investigate the signatures induced by the Symmetron ...
  • Hybrid Pℓ(k): general, unified, non-linear matter power spectrum in redshift space 
    Bose, Benjamin; Winther, Hans Arnold; Pourtsidou, Alkistis; Casas, Santiago; Lombriser, Lucas; Xia, Qianli; Cataneo, Matteo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Constraints on gravity and cosmology will greatly benefit from performing joint clustering and weak lensing analyses on large-scale structure data sets. Utilising non-linear information coming from small physical scales ...
  • Hydrodynamic effects in the symmetron and f(R)-gravity models 
    Hammami, Amir; Llinares, Claudio; Mota, David; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    In this paper, we present the first results from implementing two scalar–tensor modified gravity theories, the symmetron and the Hu–Sawicki f(R)-gravity model, into a hydrodynamic N-body code with dark matter particles and ...
  • Investigating cosmological GAN emulators using latent space interpolation 
    Tamosiunas, Andrius; Winther, Hans Arnold; Koyama, Kazuya; Bacon, David; Nichol, Robert C.; Mawdsley, Ben (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    ABSTRACT Generative adversarial networks (GANs) have been recently applied as a novel emulation technique for large-scale structure simulations. Recent results show that GANs can be used as a fast and efficient ...
  • ISIS: a new N-body cosmological code with scalar fields based on RAMSES - Code presentation and application to the shapes of clusters 
    Llinares, Claudio; Mota, David; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Several extensions of the standard cosmological model include scalar fields as new degrees of freedom in the underlying gravitational theory. A particular class of these scalar field theories include screening mechanisms ...
  • Marked correlation functions in perturbation theory 
    Aviles, Alejandro; Koyama, Kazuya; Cervantes-Cota, Jorge L; Winther, Hans Arnold; Li, Baojiu (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    We develop perturbation theory approaches to model the marked correlation function constructed to up-weight low density regions of the Universe, which might help distinguish modified gravity models from the standard cosmology ...
  • Measurements of cosmic expansion and growth rate of structure from voids in the Sloan Digital Sky Survey between redshift 0.07 and 1.0 
    Woodfinden, Alex; Nadathur, Seshadri; Percival, Will J; Radinovic, Sladana; Massara, Elena; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We present measurements of the anisotropic cross-correlation of galaxies and cosmic voids in data from the Sloan Digital Sky Survey (SDSS) Main Galaxy Sample, Baryon Oscillation Spectroscopic Survey (BOSS), and extended ...