Category archives: DIPC Computational Cosmology

The origin of the <i>lensing is low</i> problem

The origin of the lensing is low problem

AstrophysicsCosmologyDIPC Computational Cosmology

By DIPC

Recent studies have revealed that the bending of light around massive galaxies is significantly smaller relative to theoretical expectations. This finding, the so-called lensing is low problem, has been interpreted as a breakdown of our cosmological model. Now, a team of scientists has found that the mismatch between theory and observations is actually caused by […]

How to analyse data from galaxy spectroscopic surveys without assuming a cosmological model

How to analyse data from galaxy spectroscopic surveys without assuming a cosmological model

AstrophysicsDIPC Computational Cosmology

By DIPC

Euclid is an ESA mission to map the geometry of the Universe and better understand the mysterious dark matter and dark energy, which make up most of the energy budget of the cosmos. The mission will investigate the distance-redshift relationship and the evolution of cosmic structures by measuring shapes and redshifts of galaxies and clusters […]

The brightest end of the Lyman alpha luminosity function

The brightest end of the Lyman alpha luminosity function

AstrophysicsCosmologyDIPC AstrophysicsDIPC Computational Cosmology

By DIPC

The Javalambre-Photometric Local Universe Survey, J-PLUS, is an unprecedented photometric sky survey of 8500 deg 2 visible from Javalambre (Aragón, Spain), using a set of 12 broad, intermediate and narrow-band filters. The J-PLUS photometric system is well suited to study the properties of nearby galaxies (z < 0.015). However, there are a few redshift windows […]

The dark collapse of merging galaxies as the origin of supermassive black holes

The dark collapse of merging galaxies as the origin of supermassive black holes

AstrophysicsCosmologyDIPC Computational Cosmology

By DIPC

I remember very well my physics professor during my first year at university. She stressed the importance of having clear intuitions of what physical terms mean before any mathematics was invoked. ‘Imagine someone drops an 100-gram apple 1 metre above your head’, she would say; ‘the pain you feel is the equivalent of a joule […]