Results 61 to 70 of about 427,202 (211)

Debiasing with Diffusion: Probabilistic Reconstruction of Dark Matter Fields from Galaxies with CAMELS

The Astrophysical Journal
Galaxies are biased tracers of the underlying cosmic web, which is dominated by dark matter (DM) components that cannot be directly observed. Galaxy formation simulations can be used to study the relationship between DM density fields and galaxy ...
Victoria Ono, Core Francisco Park, Nayantara Mudur, Yueying Ni, Carolina Cuesta-Lazaro, Francisco Villaescusa-Navarro   +5 more
doaj   +1 more source

Is the Lambda CDM Model Consistent with Observations of Large-Scale Structure?

, 2000
The claim that large-scale structure data independently prefers the Lambda Cold Dark Matter model is a myth. However, an updated compilation of large-scale structure observations cannot rule out Lambda CDM at 95% confidence. We explore the possibility of
AE Evrard, E Gawiser, H Lin, H Tadros, J Robinson, LN Costa Da, NA Bahcall, PM Garnavich, PTP Viana, S Buries, S Perlmutter, T Kolatt, W Hu   +12 more
core   +2 more sources

Stabilization of Large Scale Structure by Adhesive Gravitational Clustering [PDF]

, 1999
The interplay between gravitational and dispersive forces in a multi-streamed medium leads to an effect which is exposed in the present note as the genuine driving force of stabilization of large-scale structure. The conception of `adhesive gravitational
Buchert, Thomas
core   +3 more sources

Could the electroweak scale be linked to the large scale structure of the Universe? [PDF]

We study a model where the domain walls are generated through a cosmological phase transition involving a scalar field. We assume the existence of a coupling between the scalar field and dark matter and show that the interaction between domain walls and ...
Chakravorty, Alak, Massarotti, Alessandro   +1 more
core   +1 more source

A Parameter-masked Mock Data Challenge for Beyond-two-point Galaxy Clustering Statistics

The Astrophysical Journal
The past few years have seen the emergence of a wide array of novel techniques for analyzing high-precision data from upcoming galaxy surveys, which aim to extend the statistical analysis of galaxy clustering data beyond the linear regime and the ...
The Beyond-2pt Collaboration, Elisabeth Krause, Yosuke Kobayashi, Andrés N. Salcedo, Mikhail M. Ivanov, Tom Abel, Kazuyuki Akitsu, Raul E. Angulo, Giovanni Cabass, Sofia Contarini, Carolina Cuesta-Lazaro, ChangHoon Hahn, Nico Hamaus, Donghui Jeong, Chirag Modi, Nhat-Minh Nguyen, Takahiro Nishimichi, Enrique Paillas, Marcos Pellejero Ibañez, Oliver H. E. Philcox, Alice Pisani, Fabian Schmidt, Satoshi Tanaka, Giovanni Verza, Sihan Yuan, Matteo Zennaro   +25 more
doaj   +1 more source

Restrictions in the dark sector of the universe and modified gravity with large scale structure and gravitational waves

, 2023
David Figueruelo Hernán
openalex   +1 more source

The large scale structure of the Universe from a modified Friedmann equation [PDF]

, 2022
J. Ambjørn, Y. Watabiki
openalex   +1 more source

Galaxy Spin Alignment with Tidal Fields in the SDSS-IV MaNGA Survey

The Astrophysical Journal Letters
The tidal torque theory (TTT) predicts that galaxy spins are correlated with the surrounding tidal field, reflecting how angular momentum is acquired during structure formation.
Jun-Sung Moon, Teppei Okumura
doaj   +1 more source

The evidence for unusual gravity from the large-scale structure of the Universe

, 2008
Under the assumption that General Relativity (GR) correctly describes the phenomenology of our Universe, astronomical observations provide compelling evidence that (1) the dynamics of cosmic structure is dominated by dark matter (DM), an exotic matter ...
Diaferio, A.
core  

One Galaxy Sample to Rule Them All: Halo Occupation Distribution Modeling of DES Year 3 Source Galaxies

The Astrophysical Journal
For the joint analysis of second-order weak-lensing and galaxy clustering statistics, so-called 3 × 2 analyses, the selection and characterization of optimal galaxy samples is a major area of research.
Andrés N. Salcedo, Tim Eifler, Peter Behroozi   +2 more
doaj   +1 more source