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4 papers · 2 filters
CMB anomalies and the effects of local features of the inflaton potential
Alexander Gallego Cadavid, Antonio Enea Romano, Stefano Gariazzo
Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales Mpc and $k=0.00…
The maximum sizes of large scale structures in alternative theories of gravity
Sourav Bhattacharya, Konstantinos F. Dialektopoulos, Antonio Enea Romano +2
The maximum size of a cosmic structure is given by the maximum turnaround radius -- the scale where the attraction due to its mass is balanced by the repulsion due to dark energy.…
Quantifying and controlling biases in dark matter halo concentration estimates
C. N. Poveda-Ruiz, J. E. Forero-Romero, J. C. Muñoz-Cuartas
We use bootstrapping to estimate the bias of concentration estimates on N-body dark matter halos as a function of particle number. We find that algorithms based on the maximum radi…
Hubble trouble or Hubble bubble?
Antonio Enea Romano
The recent analysis of low-redshift supernovae (SN) has increased the apparent tension between the value of estimated from low and high redshift observations such as the cosm…