A cosmological underdensity does not solve the Hubble tension

Autor: Sveva Castello, Marcus Högås, Edvard Mörtsell

Publikováno v: Journal of Cosmology and Astroparticle Physics. 2022:003

A potential solution to the Hubble tension is the hypothesis that the Milky Way is located near the center of a matter underdensity. We model this scenario through the Lema\^itre-Tolman-Bondi formalism with the inclusion of a cosmological constant ($

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3cbf1f31cd36ef0b34e1b4e4f05efc5
https://doi.org/10.1088/1475-7516/2022/07/003

Lens modelling of the strongly lensed Type Ia supernova iPTF16geu

Autor: Suhail Dhawan, Edvard Mörtsell, Joel Johansson, Ariel Goobar, David Goldstein, Rahman Amanullah

In 2016, the first strongly lensed Type Ia supernova, iPTF16geu at redshift $z=0.409$ with four resolved images arranged symmetrically around the lens galaxy at $z=0.2163$, was discovered. Here, refined observations of iPTF16geu, including the time d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8bcdc58f1fa31ca367c9ba7c8c6a9e8
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423597

Magnification, dust and time-delay constraints from the first resolved strongly lensed Type Ia supernova iPTF16geu

Autor: Joel Johansson, Mansi M. Kasliwal, Hooshang Nayyeri, William H. Lee, Suhail Dhawan, P. E. Nugent, Ariel Goobar, S. B. Cenko, Edvard Mörtsell, David Goldstein, Shrinivas R. Kulkarni, Rahman Amanullah, Asantha Cooray, Robert M. Quimby, Eran O. Ofek, O. D. Fox, Raphael Kalender

Publikováno v: Monthly Notices of the Royal Astronomical Society, vol 491, iss 2

We report lensing magnifications, extinction, and time-delay estimates for the first resolved, multiply-imaged Type Ia supernova iPTF16geu, at z = 0.409, using Hubble Space Telescope (HST) observations in combination with supporting ground-based data

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::218757569b5236ac5f8a14c64110f237
https://doi.org/10.1093/mnras/stz2965

Constraints on bimetric gravity. Part II. Observational constraints

Autor: Edvard Mörtsell, Marcus Högås

Publikováno v: Journal of Cosmology and Astroparticle Physics. 2021:002

Ghost-free bimetric gravity is a theory of two interacting spin-2 fields, one massless and one massive, in addition to the standard matter particles and fields, thereby generalizing Einstein's theory of general relativity. To parameterize the theory,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46cd775756b01edb9ed0042c64482778
https://doi.org/10.1088/1475-7516/2021/05/002

Beyond ΛCDM: Problems, solutions, and the road ahead

Autor: Jonas Enander, Jose Beltrán Jiménez, Philip Bull, Seshadri Nadathur, Bin Hu, Eloisa Bentivegna, Emilio Bellini, Edvard Mörtsell, Ignacy Sawicki, Signe Riemer-Sørensen, Sebastien Clesse, Ippocratis D. Saltas, Massimiliano Rinaldi, Adam R. Solomon, Julian Adamek, L. Verde, Daniele A. Steer, Francisco Villaescusa-Navarro, Ismael Tereno, Enea Di Dio, Hans A. Winther, Marcel S. Pawlowski, Thiago S. Pereira, Glenn D. Starkman, Tessa Baker, Johannes Noller, Lavinia Heisenberg, Miguel Quartin, Douglas Spolyar, Roman Pasechnik, Yashar Akrami, Jonathan H. Davis, Vincenzo Salzano, Mikael von Strauss, Alan Heavens, Jeremy Sakstein, Stefano Camera, A. Ricciardone, Claudio Llinares, Roy Maartens

Publikováno v: Bull, P, Akrami, Y, Adamek, J, Baker, T, Bellini, E, Jiménez, J B, Bentivegna, E, Camera, S, Clesse, S, Davis, J H, Dio, E D, Enander, J, Heavens, A, Heisenberg, L, Hu, B, Llinares, C, Maartens, R, Mörtsell, E, Nadathur, S, Noller, J, Pasechnik, R, Pawlowski, M S, Pereira, T S, Quartin, M, Ricciardone, A, Riemer-Sørensen, S, Rinaldi, M, Sakstein, J, Saltas, I D, Salzano, V, Sawicki, I, Solomon, A R, Spolyar, D, Starkman, G D, Steer, D, Tereno, I, Verde, L, Villaescusa-Navarro, F, Strauss, M V & Winther, H A 2016, ' Beyond ΛCDM : problems, solutions, and the road ahead ', Physics of the Dark Universe, vol. 12, pp. 56-99 . https://doi.org/10.1016/j.dark.2016.02.001
Physics of the Dark Universe
Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona
Bull, P, Akrami, Y, Adamek, J, Baker, T, Bellini, E, Beltrán Jiménez, J, Bentivegna, E, Camera, S, Clesse, S, Davis, J H, Di Dio, E, Enander, J, Heavens, A, Heisenberg, L, Hu, B, Llinares, C, Maartens, R, Mörtsell, E, Nadathur, S, Noller, J, Pasechnik, R, Pawlowski, M S, Pereira, T S, Quartin, M, Ricciardone, A, Riemer-Sørensen, S, Rinaldi, M, Sakstein, J, Saltas, I D, Salzano, V, Sawicki, I, Solomon, A R, Spolyar, D, Starkman, G D, Steer, D, Tereno, I, Verde, L, Villaescusa-Navarro, F, von Strauss, M & Winther, H A 2016, ' Beyond ΛCDM : Problems, solutions, and the road ahead ', Physics of the Dark Universe, vol. 12, pp. 56-99 . https://doi.org/10.1016/j.dark.2016.02.001

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 th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2203d82141a444f9d3d622d224f940e
https://doi.org/10.1016/j.dark.2016.02.001