There is an excess of highly energetic radiation (gamma-rays) that comes from the direction of the Galatic Center and many ideas have been proposed to explain its origin. For a few years now, this excess emission has puzzled scientists and we followed this story in this astrobite and this one. One possibility is that dark matter particles consisting of weakly interacting particles (WIMPs), annihilate each other in this high density region, giving rise to gamma-rays.  In the paper we discuss today, the authors analyze data from the Fermi telescopeto get new insights into the origin of this excess emission.

Fermi observes the sky in gamma-rays. It explores the physics behind gamma-ray bursts, how 

Источник нейтрино
Источник нейтрино
Фото Caltech

Ученые, работающие с экспериментом NOvA заявили о регистрации первых нейтрино на дальнем из двух детекторов. Об этом сообщается в пресс-релизена сайте лаборатории Ферми. В настоящее время строительство детекторов еще не завершено, поэтому результаты носят тестовый характер.

A team of astrophysicists led by Dr Rubens Reis from the University of Michigan has directly measured the spin of a supermassive black hole in a quasar named RX J1131-1231, located 6 billion light years away from Earth.

Multiple images of the quasar RX J1131-1231 are visible in this data from Chandra and Hubble. Image credit: X-ray - NASA / CXC / University of Michigan / R.C. Reis et al; optical – NASA / STScI.

Multiple images of the quasar RX J1131-1231 are visible in this data from Chandra and Hubble. Image credit: X-ray – NASA / CXC / University of Michigan / R.C. Reis et al; optical – NASA / STScI.

Gravitational lensing by an intervening elliptical galaxy – in the middle of the

 pvalue art

For a brief moment in 2010, Matt Motyl was on the brink of scientific glory: he had discovered that extremists quite literally see the world in black and white.

The results were “plain as day”, recalls Motyl, a psychology PhD student at the University of Virginia in Charlottesville. Data from a study of nearly 2,000 people seemed to show that political moderates saw shades of grey more accurately than did either left-wing or right-wing extremists. “The hypothesis was sexy,” he says, “and the data provided clear support.” The P value, a common index for the strength of evidence, was 0.01 — usually interpreted as 'very significant'. Publication in a high-impact journal seemed within Motyl's grasp.