Zobrazeno 1 - 10
of 564
pro vyhledávání: '"Durrer, Ruth"'
Autor:
Tiwari, Prabhakar, Schwarz, Dominik J., Zhao, Gong-Bo, Durrer, Ruth, Kunz, Martin, Padmanabhan, Hamsa
We utilize the Sloan Digital Sky Survey (SDSS) extended Baryon Oscillation Spectroscopic Survey (eBOSS) and Baryon Oscillation Spectroscopic Survey (BOSS) catalogs with precise spectroscopic redshifts to estimate the kinematic redshift dipole caused
Externí odkaz:
http://arxiv.org/abs/2409.09946
We present a model independent analysis of the Pantheon+ supernova sample and study the dependence of the recovered values of $H_0$, $q_0$ and $j_0$ on the redshift cut and on the modeling of peculiar velocities. In addition to the bulk velocity disc
Externí odkaz:
http://arxiv.org/abs/2407.07002
In previous work we have shown that the dipole in the low redshift supernovae of the Pantheon+SH0ES data does not agree with the one inferred from the velocity of the solar system as obtained from CMB data. We interpreted this as the presence of sign
Externí odkaz:
http://arxiv.org/abs/2403.17741
Publikováno v:
JCAP 06 (2024) 045
To date, the most precise measurement of the observer's peculiar velocity comes from the dipole in the Cosmic Microwave Background (CMB). This velocity also generates a dipole in the source number counts, whose amplitude is governed not only by the o
Externí odkaz:
http://arxiv.org/abs/2402.18438
Autor:
Adamek, Julian, Clarkson, Chris, Durrer, Ruth, Heinesen, Asta, Kunz, Martin, Macpherson, Hayley J.
Publikováno v:
The Open Journal of Astrophysics 7 (2024)
Anisotropies in the distance-redshift relation of cosmological sources are expected due to large-scale inhomogeneities in the local Universe. When the observed sources are tracing a large-scale matter flow in a general spacetime geometry, the distanc
Externí odkaz:
http://arxiv.org/abs/2402.12165
In this paper we calculate the linear perturbations of the cosmological redshift drift. We show explicitly that our expressions are gauge-invariant and compute the power spectrum of the redshift drift perturbations and its correlations with galaxy nu
Externí odkaz:
http://arxiv.org/abs/2306.13911
Publikováno v:
JCAP08(2023)033
Hawking's quasi-local energy definition quantifies the energy enclosed by a spacelike 2-sphere in terms of the amount of lightbending on the sphere caused by the energy distribution inside the sphere. This paper establishes for the first time a direc
Externí odkaz:
http://arxiv.org/abs/2305.00711
In this paper we determine the dipole in the distance redshift relation from the Pantheon+ data. We find that, while its amplitude roughly agrees with the dipole found in the cosmic microwave background which is attributed to the motion of the solar
Externí odkaz:
http://arxiv.org/abs/2212.10328
Publikováno v:
Phys. Rev. Lett. 130, 191002 (2023)
Bouncing models of cosmology, as they arise e.g. in loop quantum cosmology, can be followed by an inflationary phase and generate close-to-scale-invariant fluctuation spectra as observed in the Cosmic Microwave Background (CMB). However, they are typ
Externí odkaz:
http://arxiv.org/abs/2212.05977