CEA News




Latest and archived news from the Centre for Extragalactic Astronomy at Durham University.

Head over to our Vimeo channel for videos connected to our research.

Enhanced compact AGN radio emission in red quasars

Vicky Fawcett, April 2020

The majority of the quasar population are blue at optical wavelengths, typically due to an obscured view of the supermassive black hole accretion disc. However, there is a small but significant subset with redder optical- infrared (IR) colours (coined as “red QSOs”)...

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Triple Rollover: a third lensed source for the Jackpot system

Russell Smith, April 2020

Gravitational lensing -- the deflection of light rays from distant sources by objects along the line-of-sight -- is an invaluable tool to learn about the distribution of mass in the intervening galaxies...

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Studying the most luminous galaxies in the Universe

Ian Smail, March 2020

The most actively star-forming galaxies in the Universe frequently hide their activity behind obscuring clouds of soot-like dust. Initially formed in the atmospheres of massive stars as they age, the dust absorbs much of the starlight from these distant galaxies...

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Exploring the jungle with VLT-MUSE

Rich Bielby, January 2020

When people talk about galaxies, we often think of the luminous matter, i.e. the stars and maybe the dense clouds of gas illuminated by stars. However much of a galaxy's baryonice mass is contained not in the stuff we can see, but in massive clouds of unilluminated gas. The obvious earth bound comparison here is with icebergs: what we see is only the tip....

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Towards a direct measurement of cosmic acceleration

Ryan Cooke, January 2020

Models of quantum gravity predict that the very structure of spacetime on length scales comparable to the Planck length, lP = 1.6 x 10-35 m, is `frothy' or `foamy' - spacetime should contain `bubbles' of uncertainty. The basic idea is that distance measurements come with some intrinsic uncertainty, and this uncertainty becomes magnified over very large distances.....

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Towards a direct measurement of cosmic acceleration

Ryan Cooke, December 2019

CEA astronomers have published a paper providing some of the groundwork that will allow us to work towards a direct measurement of the expansion rate of the Universe. Our current measurements of the expansion of the Universe are all indirect, which means that these measurements depend on a model to infer the expansion rate....

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