Zobrazeno 1 - 10
of 1 457
pro vyhledávání: '"Power, Chris"'
Autor:
Ussing, Adam, Paun, Robert Adriel Mostoghiu, Croton, Darren, Boehm, Celine, Duffy, Alan, Power, Chris
In this paper, we use hydrodynamic zoom-in simulations of Milky Way-type haloes to explore using dust as an observational tracer to discriminate between cold and warm dark matter universes. Comparing a cold and 3.5keV warm dark matter particle model,
Externí odkaz:
http://arxiv.org/abs/2409.14780
Autor:
Contreras-Santos, Ana, Buitrago, Fernando, Knebe, Alexander, Rasia, Elena, Pearce, Frazer R., Cui, Weiguang, Power, Chris, Winstanley, Jordan
The observation of a massive galaxy with an extremely low dark matter content (i.e. NGC 1277) has posed questions about how such objects form and evolve in a hierarchical universe. We here report on the finding of several massive, dark matter-deficie
Externí odkaz:
http://arxiv.org/abs/2409.10356
Recent JWST observations of very early galaxies, at $z \geq 10$, has led to claims that tension exists between the sizes and luminosities of high-redshift galaxies and what is predicted by standard ${\Lambda}$CMD models. Here we use the adaptive mesh
Externí odkaz:
http://arxiv.org/abs/2408.15194
We investigate the relationship between a galaxy cluster's hydrostatic equilibrium state, the entropy profile, $K$, of the intracluster gas, and the system's non-thermal pressure (NTP), within an analytic model of cluster structures. When NTP is negl
Externí odkaz:
http://arxiv.org/abs/2406.19029
Cosmological parameters such as $\Omega_{\rm{M}}$ and $\sigma_{8}$ can be measured indirectly using various methods, including galaxy cluster abundance and cosmic shear. These measurements constrain the composite parameter $S_{8}$, leading to degener
Externí odkaz:
http://arxiv.org/abs/2406.17849
Autor:
Haggar, Roan, De Luca, Federico, De Petris, Marco, Sazonova, Elizaveta, Taylor, James E., Knebe, Alexander, Gray, Meghan E., Pearce, Frazer R., Contreras-Santos, Ana, Cui, Weiguang, Kuchner, Ulrike, Paun, Robert A. Mostoghiu, Power, Chris
Numerous metrics exist to quantify the dynamical state of galaxy clusters, both observationally and within simulations. Many of these correlate strongly with one another, but it is not clear whether all of these measures probe the same intrinsic prop
Externí odkaz:
http://arxiv.org/abs/2406.15555
Autor:
Menon, Anand, Power, Chris
The baryon mass content of dark matter halos in the early Universe depends on global factors - e.g. ionising ultraviolet (UV) radiation background - and local factors - e.g. star formation efficiency and assembly history. We use a lightweight semi-an
Externí odkaz:
http://arxiv.org/abs/2405.03211
We investigate the connection between a cluster's structural configuration and observable measures of its gas emission that can be obtained in X-ray and Sunyaev-Zeldovich (SZ) surveys. We present an analytic model for the intracluster gas density pro
Externí odkaz:
http://arxiv.org/abs/2403.09946
We investigate the relationship between a dark matter halo's mass profile and measures of the velocity dispersion of kinematic tracers within its gravitational potential. By predicting the scaling relation of the halo mass with the aperture velocity
Externí odkaz:
http://arxiv.org/abs/2403.07352
Autor:
Shabala, Stanislav, Yates-Jones, Patrick, Jerrim, Larissa, Turner, Ross, Krause, Martin, Norris, Ray, Koribalski, Baerbel, Filipovic, Miroslav, Rudnick, Larry, Power, Chris, Crocker, Roland
Odd Radio Circles (ORCs) are a class of low surface brightness, circular objects approximately one arcminute in diameter. ORCs were recently discovered in the Australian Square Kilometre Array Pathfinder (ASKAP) data, and subsequently confirmed with
Externí odkaz:
http://arxiv.org/abs/2402.09708