Beyond ΛCDM: Problems, solutions, and the road ahead

Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle natur...

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Detalles Bibliográficos
Autores: Bull, Philip, Akrami, Yashar, Adamek, Julian, Baker, Tessa, Bellini, Emilio, Beltrán Jiménez, José, Bentivegna, Eloisa, Camera, Stefano, Clesse, Sebastien, Davis, Jonathan H., Di Dio, Enea, Enander, Jonas, Heavens, Alan F., Heisenberg, Lavinia, Hu, Bin, Llinares, Claudio, Maartens, Roy, Mörtsell, Edvard, Nadathur, Seshadri, Noller, Johannes, Pasechnik, Roman, Pawlowski, Marcel S., Pereira, Thiago S., Quartin, Miguel, Ricciardone, Angelo, Riemer Sørensen, Signe, Rinaldi, Massimiliano, Sakstein, Jeremy, Saltas, Ippocratis D., Salzano, Vincenzo, Sawicki, Ignacy, Solomon, Adam R., Spolyar, Douglas, Starkman, Glenn D., Steer, Daniele, Tereno, Ismael, Verde, Licia, Villaescusa-Navarro, Francisco, von Strauss, Mikael, Winther, Hans A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/119262
Acceso en línea:https://hdl.handle.net/2445/119262
Access Level:acceso abierto
Palabra clave:Cosmologia
Matèria fosca (Astronomia)
Cosmology
Dark matter (Astronomy)
Descripción
Sumario:Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm. In this paper, we summarize the current status of ΛCDM as a physical theory, and review investigations into possible alternatives along a number of different lines, with a particular focus on highlighting the most promising directions. While the fundamental problems are proving reluctant to yield, the study of alternative cosmologies has led to considerable progress, with much more to come if hopes about forthcoming high-precision observations and new theoretical ideas are fulfilled.

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