Third order solutions of the cosmological density perturbations in the Horndeski's most general scalar-tensor theory with the Vainshtein mechanism

Autor: Yuichiro Takushima, Ayumu Terukina, Kazuhiro Yamamoto

We study the third order solutions of the cosmological density perturbations in the Horndeski's most general scalar-tensor theory under the condition that the Vainshtein mechanism is at work. In this work, we thoroughly investigate the independence p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02ab52b9414393f06b04c08843014904
http://arxiv.org/abs/1502.03935

What can we learn from higher multipole power spectra of galaxy distribution in redshift space?

Autor: Gert Hütsi, Tatsuro Kanemaru, Kazuhiro Yamamoto, Ayumu Terukina, Chiaki Hikage

We investigate a potential of the higher multipole power spectra of the galaxy distribution in redshift space as a cosmological probe on halo scales. Based on the fact that a halo model explains well the multipole power spectra of the luminous red ga

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64030d5667abd631e4e0fa6ccc31f39d

Testing chameleon gravity with the Coma cluster

Autor: Robert C. Nichol, Ayumu Terukina, David Bacon, Lucas Lombriser, Kazuhiro Yamamoto, Kazuya Koyama

Publikováno v: Terukina, A, Lombriser, L, Yamamoto, K, Bacon, D, Koyama, K & Nichol, R C 2014, ' Testing chameleon gravity with the Coma cluster ', Journal of Cosmology and Astroparticle Physics, vol. 2014, no. 4, 125003, pp. 1-30 . https://doi.org/10.1088/1475-7516/2014/04/013

We propose a novel method to test the gravitational interactions in the outskirts of galaxy clusters. When gravity is modified, this is typically accompanied by the introduction of an additional scalar degree of freedom, which mediates an attractive

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb4a072bcfc36be5fba0a41b71e2d61d
https://doi.org/10.1088/1475-7516/2014/04/013

The XMM cluster survey: Testing chameleon gravity using the profiles of clusters

Autor: H. Wilcox, Pedro T. P. Viana, John P. Stott, A. Kathy Romer, Ayumu Terukina, David Bacon, Julian A. Mayers, Maria Manolopoulou, Andrew R. Liddle, Ross Hood, Christopher J. Miller, Nicola Mehrtens, Kazuya Koyama, Matt Hilton, P. Rooney, Martin Sahlén, Chris A. Collins, Robert C. Nichol, Gong-Bo Zhao, Robert G. Mann

Publikováno v: Wilcox, H, Bacon, D, Nichol, R C, Rooney, P J, Terukina, A, Romer, A K, Koyama, K, Zhao, G-B, Hood, R, Mann, R G, Hilton, M, Manolopoulou, M, Sahlen, M, Collins, C A, Liddle, A R, Mayers, J A, Mehrtens, N, Miller, C J, Stott, J P & Viana, P T P 2015, ' The XMM Cluster Survey : testing chameleon gravity using the profiles of clusters ', Monthly Notices of the Royal Astronomical Society, vol. 452, no. 2, pp. 1171-1183 . https://doi.org/10.1093/mnras/stv1366
Wilcox, H, Bacon, D, Nichol, R C, Rooney, P J, Terukina, A, Romer, A K, Koyama, K, Zhao, G-B, Hood, R, Mann, R G, Hilton, M, Manolopoulou, M, Sahlen, M, Collins, C A, Liddle, A R, Mayers, J A, Mehrtens, N, Miller, C J, Stott, J P & Viana, P T P 2015, ' The XMM Cluster Survey : Testing chameleon gravity using the profiles of clusters ', Monthly Notices of the Royal Astronomical Society, vol. 452, no. 2, pp. 1171-1183 . https://doi.org/10.1093/mnras/stv1366

The chameleon gravity model postulates the existence of a scalar field that couples with matter to mediate a fifth force. If it exists, this fifth force would influence the hot X-ray emitting gas filling the potential wells of galaxy clusters. Howeve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d0c6d104a82eed2d779303228a7918a
https://researchonline.ljmu.ac.uk/id/eprint/1976/1/MNRAS-2015-Wilcox-1171-83.pdf