Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Wojciech A. Hellwing"'
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 166 (2023)
Wide-area deep imaging surveys have discovered large numbers of extremely low surface brightness (LSB) dwarf galaxies, which challenge galaxy formation theory and, potentially, offer new constraints on the nature of dark matter. Here we discuss one a
Externí odkaz:
https://doaj.org/article/29f5dcee183048ffa3bedcf0570a997d
Autor:
Simon Pfeifer, Noam I Libeskind, Yehuda Hoffman, Wojciech A Hellwing, Maciej Bilicki, Krishna Naidoo
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:470-479
The large scale galaxy and matter distribution is often described by means of the cosmic web made up of voids, sheets, filaments and knots. Many different recipes exist for identifying this cosmic web. Here we focus on a sub-class of cosmic web ident
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::896443a82a1882e1c3760d013f6c91a5
https://doi.org/10.1093/mnras/stac1382
https://doi.org/10.1093/mnras/stac1382
Publikováno v:
Physical Review D. 105
We study the halo mass function (HMF) in modified gravity (MG) models using a set of large $N$-body simulations -- the ELEPHANT suite. We consider two popular beyond-general relativity scenarios: the Hu-Sawicki chameleon $f(R)$ model and the normal b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9999d43773a6c11cf8f0f32a63f34276
https://doi.org/10.1103/physrevd.105.043538
https://doi.org/10.1103/physrevd.105.043538
Autor:
Krishna Naidoo, Wojciech A. Hellwing, Maciej Bilicki, Noam Libeskind, Simon Pfeifer, Yehuda Hoffman
We present a methodology for constructing modified gravity (MG) constrained simulations of the local Universe using positions and peculiar velocities from the CosmicFlows data set. Our analysis focuses on the following MG models: the normal branch of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::202e493c83816e0b8ba9ab2a4a44cb5e
Publikováno v:
Physical Review D. 103
We investigate clustering properties of dark matter halos and galaxies to search for optimal statistics and scales where possible departures from general relativity (GR) could be found. We use large N-body cosmological simulations to perform measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9127f6e510f64ba4c9ce89dfb967d99f
https://doi.org/10.1103/physrevd.103.103524
https://doi.org/10.1103/physrevd.103.103524
Publikováno v:
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2021, 507 (4), pp.4826-4839. ⟨10.1093/mnras/stab2452⟩
Monthly Notices of the Royal Astronomical Society, 507(4), 4826-4839
Mon.Not.Roy.Astron.Soc., 2021, 507 (4), pp.4826-4839. ⟨10.1093/mnras/stab2452⟩
Monthly Notices of the Royal Astronomical Society, 507(4), 4826-4839
The spatial distribution of Milky Way (MW) subhaloes provides an important set of observables for testing cosmological models. These include the radial distribution of luminous satellites, planar configurations, and the abundance of dark subhaloes wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e63dfb92fc731c7a11ffc5f45c1db827
http://arxiv.org/abs/2104.03322
http://arxiv.org/abs/2104.03322
Publikováno v:
Physical Review D-Particles, Fields, Gravitation and Cosmology, 103(6)
Physical Review. B: Condensed Matter and Materials Physics, 103:063517. AMER PHYSICAL SOC
Physical Review. B: Condensed Matter and Materials Physics, 103:063517. AMER PHYSICAL SOC
Using a set of high-resolution simulations we study the statistical correlation of dark matter halo properties with the large-scale environment. We consider halo populations split into four Cosmic Web (CW) elements: voids, walls, filaments, and nodes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81a1cf9104e3ab9629ef8dfef4d74b27
http://hdl.handle.net/1887/3250929
http://hdl.handle.net/1887/3250929
Publikováno v:
Journal of Cosmology and Astroparticle Physics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=r3c4b2081b22::4c2ce00b99485f2eeecfcd095a8c9a58
Autor:
Carlos S. Frenk, Wojciech A. Hellwing, Azadeh Fattahi, Aaron D. Ludlow, Jesús Zavala, Mark R. Lovell, Jennifer A. Hardwick, Andrew Robertson
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly notices of the Royal Astronomical Society, 2020, Vol.498(1), pp.702-717 [Peer Reviewed Journal]
Monthly notices of the Royal Astronomical Society, 2020, Vol.498(1), pp.702-717 [Peer Reviewed Journal]
The nature of the dark matter can affect the collapse time of dark matter haloes, and can therefore be imprinted in observables such as the stellar population ages and star formation histories of dwarf galaxies. In this paper we use high resolution h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38bd273f0d0a437838ad451ed61cdd08
http://arxiv.org/abs/2002.11129
http://arxiv.org/abs/2002.11129
Autor:
Wojciech A. Hellwing, Dmytro Iakubovskyi, Carlos S. Frenk, Sownak Bose, Mark R. Lovell, Tom Theuns, David J. Barnes
Publikováno v:
The astrophysical journal, 2019, Vol.875(2), pp.L24 [Peer Reviewed Journal]
The Astrophysical Journal
The Astrophysical Journal
The nearby Perseus galaxy cluster is a key target for indirect detection searches for decaying dark matter. We use the C-EAGLE simulations of galaxy clusters to predict the flux, width and shape of a dark matter decay line, paying particular attentio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de68dce58729a136d00539c10695a5c7
http://arxiv.org/abs/1903.11608
http://arxiv.org/abs/1903.11608