• Corpus ID: 238531500

A Cosmological Underdensity Does Not Solve the Hubble Tension

  title={A Cosmological Underdensity Does Not Solve the Hubble Tension},
  author={Sveva Castello and Marcus Hogaas and Edvard Mortsell},
A potential solution to the Hubble tension is the hypothesis that the Milky Way is located near the center of a matter underdensity. We model this scenario through the Lemâıtre–Tolman–Bondi formalism with the inclusion of a cosmological constant (ΛLTB) and consider a generalized Gaussian parametrization for the matter density profile. We constrain the underdensity and the background cosmology with a combination of data sets: the Pantheon Sample of type Ia supernovae (both the full catalogue and… 
1 Citations

Figures and Tables from this paper

A new perspective on cosmology through Supernovae Ia and Gamma Ray Bursts
The actual knowledge of the structure and future evolution of our universe is based on the use of cosmological models, which can be tested through the so-called ’probes’, namely astrophysical


Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology
The possibility that we live in a special place in the universe, close to the centre of a large void, seems an appealing alternative to the prevailing interpretation of the acceleration of the
The KBC Void: Consistency with Supernovae Type Ia and the Kinematic SZ Effect in a ΛLTB Model
There is substantial and growing observational evidence from the normalized luminosity density in the near-infrared that the local universe is underdense on scales of several hundred megaparsecs. We
The Copernican principle in light of the latest cosmological data
We pursue a program to confront observations with inhomogeneous extensions of the FLRW metric. The main idea is to test the Copernican principle rather than assuming it a priori. We consider the ΛCDM
Consistency of the local Hubble constant with the cosmic microwave background
Abstract A significant tension has become manifest between the current expansion rate of our Universe measured from the cosmic microwave background by the Planck satellite and from local distance
Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z ∼ 2
One of the most compelling tasks of modern cosmology is to constrain the expansion history of the Universe, since this measurement can give insights on the nature of dark energy and help to estimate
Observational evidence for a local underdensity in the Universe and its effect on the measurement of the Hubble constant
For precision cosmological studies it is important to know the local properties of our reference point from which we observe the Universe. In particular for the determination of the Hubble constant
The Local Perspective on the Hubble Tension: Local Structure Does Not Impact Measurement of the Hubble Constant
We use the largest sample to date of spectroscopic SN Ia distances and redshifts to look for evidence in the Hubble diagram of large scale outflows caused by local voids suggested to exist at z 20%,
Small scale cosmological perturbations: An Analytic approach
Through analytic techniques verified by numerical calculations, we establish general relations between the matter and cosmic microwave background (CMB) power spectra and their dependence on
Cosmological Model Insensitivity of Local H 0 from the Cepheid Distance Ladder
The observed tension ($\sim 9\%$ difference) between the local distance ladder measurement of the Hubble constant, $H_0$, and its value inferred from the cosmic microwave background (CMB) could hint
The 6dF Galaxy Survey: baryon acoustic oscillations and the local Hubble constant
We analyse the large-scale correlation function of the 6dF Galaxy Survey (6dFGS) and detect a baryon acoustic oscillation (BAO) signal at 105h −1 Mpc. The 6dFGS BAO detection allows us to constrain