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Kavli Institute for Cosmology, Cambridge


Pulsars hint at cosmic gravitational-wave background

Thu, 06/05/2021 - 08:48

The observation of tiny deviations in the arrival times of radio pulses from neutron stars could be our first glimpse at gravitational waves from merging supermassive black holes.

'Strong' evidence found for a new force of nature

Thu, 08/04/2021 - 09:01

Physicists may have just made a major breakthrough in our understanding of the Universe.

Leading hadronic contribution to the muon magnetic moment from lattice QCD

Thu, 08/04/2021 - 08:58

Nature, Published online: 07 April 2021; doi:10.1038/s41586-021-03418-1

A precise theoretical computation of the anomalous magnetic moment of the muon based on ab initio quantum chromodynamics and quantum electrodynamics calculations is presented, which favours the existing experimental values.

Is the standard model broken? Physicists cheer major muon result

Thu, 08/04/2021 - 08:58

Nature, Published online: 07 April 2021; doi:10.1038/d41586-021-00898-z

The muon’s magnetic moment is larger than expected — a hint that new elementary particles are waiting to be discovered.

Faint galaxies light up the dark web filling the cosmos

Sat, 27/03/2021 - 13:08

Nature, Published online: 26 March 2021; doi:10.1038/d41586-021-00824-3

Dim, distant collections of stars hint at the early evolution of the Universe.

Giant ice cube hints at the existence of cosmic antineutrinos

Thu, 11/03/2021 - 08:53

Nature, Published online: 10 March 2021; doi:10.1038/d41586-021-00486-1

Evidence of a rare neutrino-interaction process called the Glashow resonance has been observed by a detector buried deep in the Antarctic ice — opening up a way to probe neutrino formation in astrophysical sources.

Little book, big science

Thu, 04/03/2021 - 09:23

As Lyman Page – the eminent Princeton University cosmologist – recounts in The Little Book of Cosmology, it was the discovery of the cosmic microwave background (CMB) that started the age of cosmology we’re in now

The cosmologist modelling the Universe with maths

Fri, 19/02/2021 - 07:46

Dr Tobias Baldauf likes nothing better than seeing an equation ‘cross reality’. His work is helping us to answer some of the remaining questions about the Universe.

Shedding squeezed light on dark matter

Fri, 12/02/2021 - 09:11

Nature, Published online: 10 February 2021; doi:10.1038/d41586-021-00295-6

Hypothetical particles called axions could constitute dark matter — the unseen component of the Universe. An experiment shows how quantum-manipulation technology can improve the sensitivity of axion detectors.

A quantum enhanced search for dark matter axions

Fri, 12/02/2021 - 09:10

Nature, Published online: 10 February 2021; doi:10.1038/s41586-021-03226-7

A quantum enhanced search for dark matter that uses vacuum squeezing to overcome the quantum noise limit finds no evidence of dark matter axions in a well motivated mass range.

A massive stellar bulge in a regularly rotating galaxy 1.2 billion years after the Big Bang

Fri, 12/02/2021 - 09:04

Cosmological models predict that galaxies forming in the early Universe experience a chaotic phase of gas accretion and star formation, followed by gas ejection due to feedback processes. Galaxy bulges may assemble later via mergers or internal evolution. Here we present submillimeter observations (with spatial resolution of 700 parsecs) of ALESS 073.1, a starburst galaxy at redshift when the Universe was 1.2 billion years old. This galaxy’s cold gas forms a regularly rotating disk with negligible noncircular motions. The galaxy rotation curve requires the presence of a central bulge in addition to a star-forming disk. We conclude that massive bulges and regularly rotating disks can form more rapidly in the early Universe than predicted by models of galaxy formation.