Tag Archive for 'Gamma rays'

An artist’s impression of a blazar. Image credit: DESY / Science Communication Lab.

Astronomers Pinpoint Source of High-Energy Neutrinos for First Time

Jul 13, 2018 by News Staff

A large multinational team of astronomers has found the first evidence of a source of super-energetic neutrino particles: a distant blazar — the...

This view shows the entire sky at energies greater than 1 GeV based on five years of data from the LAT instrument on NASA’s Fermi Gamma-ray Space Telescope; the most prominent feature is the bright band of diffuse glow along the map’s center, which marks the central plane of our Milky Way Galaxy. Image credit: NASA / DOE / Fermi LAT Collaboration.

Mysterious Gamma-Ray Signal Comes from Ancient Stars at Milky Way’s Center

Mar 14, 2018 by News Staff

An international group of researchers has discovered that an anomalous gamma-ray signal from Milky Way’s center comes from 10 billion-year-old stars,...

This artist’s impression shows a gamma-ray burst in a star forming region. Image credit: L. Calçada / ESO.

Physicists Create Mini Gamma-Ray Burst in the Lab

Jan 24, 2018 by News Staff

An international team of physicists has created the first small-scale replica of gamma ray bursts in a laboratory, opening up a whole new way to investigate...

Enoto et al describe how gamma rays from lightning react with the air to produce radioisotopes and even positrons. Image credit: Teruaki Enoto, Kyoto University.

Lightning Strikes Produce Antimatter Particles in Earth’s Atmosphere

Nov 23, 2017 by News Staff

Scientists from Japan and Singapore report in the November 23 issue of the journal Nature that they observed positron (antimatter counterpart of the electron)...

Artist’s illustration of two merging neutron stars. Image credit: NSF / LIGO / Sonoma State University / A. Simonnet.

Scientists Detect Gravitational Waves from Colliding Neutron Stars

Oct 17, 2017 by News Staff

The LIGO Scientific Collaboration, Virgo Collaboration, and their partners have directly detected gravitational waves — ripples in space and time...

An all-sky image of the Milky Way Galaxy, as observed by ESA’s Planck Space Observatory in IR. The data contained in this image were used in this research and were essential in calculating the distribution of the light energy of the Galaxy. Image credit: ESA / HFI / LFI consortia.

Researchers Map Light Energy Distribution in Milky Way Galaxy

Jul 31, 2017 by News Staff

An international team of scientists has used data from ESA’s Planck Space Observatory and other telescopes to map the distribution of all light energy...

NASA’s Spitzer Space Telescope, Chandra X-ray Observatory, and the NASA/ESA Hubble Space Telescope produced this composite image of the central region of our Milky Way Galaxy. Note that the center of the Galaxy is located within the bright white region to the right of and just below the middle of the image. Image credit: NASA / JPL-Caltech / ESA / CXC / STScI.

High-Energy ‘Trap’ Spotted in Milky Way’s Center

Jul 19, 2017 by News Staff

The center of our Milky Way Galaxy contains a ‘trap’ that concentrates some of the highest-energy cosmic rays, according to a new analysis of data...

NASA’s Fermi telescope has detected a gamma-ray excess (shown in yellow-white) at the center of the Andromeda galaxy that’s similar to a signature Fermi previously detected at the center of our own Milky Way Galaxy. Scientists think the signal could be produced by a variety of processes, including a population of pulsars or even dark matter. Image credit: NASA / DOE / Fermi LAT Collaboration / Bill Schoening / Vanessa Harvey / REU Program / NOAO / AURA / NSF.

Fermi Finds Dark Matter Clues in Andromeda Galaxy

Feb 22, 2017 by News Staff

NASA’s Fermi telescope has detected a strong gamma-ray signal coming from the core of the Andromeda galaxy (also known as Messier 31) that could indicate...

In the heart of an active galaxy, matter falling toward a supermassive black hole creates jets of particles traveling near the speed of light. For active galaxies classified as blazars, one of these jets beams almost directly toward Earth. Image credit: NASA / Goddard Space Flight Center Conceptual Image Lab.

NASA’s Fermi Spacecraft Finds Five High Redshift Blazars

Feb 1, 2017 by News Staff

NASA’s Fermi Gamma-Ray Space Telescope has spotted the five most distant gamma-ray blazars — a type of galaxy whose intense emissions are powered...

Prof. Gordon Cates and Dr. Wilson Miller with the unique imaging apparatus the team built in their lab. Image credit: Dan Addison / University of Virginia.

Polarized Nuclear Imaging: New Technique Has Potential for High-Resolution Medical Diagnostics

Nov 2, 2016 by News Staff

A team of researchers at the University of Virginia has devised a new imaging approach that combines powerful aspects of both magnetic resonance imaging...

Blazars are the most common sources detected by NASA’s Fermi Gamma-ray Space Telescope. As matter falls toward the supermassive black hole at the galaxy’s center, some of it is accelerated outward at nearly the speed of light along jets pointed in opposite directions. When one of the jets happens to be aimed in the direction of Earth, as illustrated here, the galaxy appears especially bright and is classified as a blazar. Image credit: M. Weiss / CfA.

NASA Space Telescopes Reveal Unexpected Blazar Connection

Aug 24, 2016 by News Staff

Astronomers studying black-hole-powered galaxies called blazars have uncovered a surprising link between two very different wavelengths of the light these...

Artist’s impression of the giant molecular clouds surrounding the Milky Way’s center, bombarded by very high energy protons accelerated in the vicinity of Sagittarius A*. Image credit: Mark A. Garlick / H.E.S.S. Collaboration.

PeVatron: Source of Very-High-Energy Cosmic Rays Discovered at Milky Way’s Center

Mar 17, 2016 by Enrico de Lazaro

Using the H.E.S.S. (High Energy Stereoscopic System) Observatory, a system of four imaging atmospheric Cherenkov telescopes in Namibia, astronomers have...

This artist’s concept shows an active supermassive black hole with a jet streaming outward at nearly the speed of light. Such black holes are often found at the hearts of elliptical galaxies. Not all black holes have jets, but when they do, the jets can be pointed in any direction. If a jet happens to shine at Earth, the object is called a blazar. Image credit: NASA / JPL-Caltech.

Unidentified Gamma-Ray Sources: Important Piece of Puzzle Coming in Place

Feb 1, 2016 by News Staff

This artist’s concept shows an active supermassive black hole with a jet streaming outward at nearly the speed of light. Such black holes are often found...

Blazars are the most common sources detected by NASA’s Fermi telescope. As matter falls toward a supermassive black hole at the galaxy’s center, some of it is accelerated outward at nearly the speed of light along jets pointed in opposite directions. When one of the jets happens to be aimed in the direction of Earth, as illustrated here, the galaxy appears especially bright and is classified as a blazar. Image credit: M. Weiss / CfA.

Astronomers Detect High-Energy Gamma Rays from Blazar 7.6 Billion Light-Years Away

Dec 16, 2015 by News Staff

Using NASA’s Fermi Space Telescope, the Very Energetic Radiation Imaging Telescope Array System (VERITAS) in Arizona, and other telescopes, astronomers...

An image of the distribution of GRBs on the sky at a distance of 9 billion light-years, centered on the newly-discovered ring-like structure; the positions of the GRBs are marked by blue dots, and the Milky Way is indicated for reference, running from left to right across the image. Image credit: Lajos Balazs.

Astronomers Discover Ring-Like Structure 5.6 Billion Light-Years Across

Aug 5, 2015 by News Staff

A team of astronomers from Hungary and the United States has announced the discovery of the largest regular formation in the observable Universe –...

This artist’s impression shows a supernova and associated gamma-ray burst driven by a rapidly spinning magnetar. Image credit: ESO.

Ultra-Long Gamma-Ray Bursts are Driven by Magnetars, Astronomers Say

Jul 9, 2015 by News Staff

A team of astronomers led by Dr Jochen Greiner of the Max Planck Institute for Extraterrestrial Physics, Germany, has demonstrated a link between the bright...

Artist’s impression of a black hole feasting on matter from its companion star in a binary system. Image credit: ESA / ATG medialab.

V404 Cygni: Astronomers Detect Signs of Extraordinary Activity in Binary System

Jun 26, 2015 by News Staff

Astronomers using a fleet of orbiting telescopes, including ESA’s Integral satellite, NASA’s Swift satellite and the Japanese MAXI telescope, have...

This image shows the newly-discovered dwarf galaxy Reticulum 2. Image credit: Sergey E. Koposov et al / Dark Energy Survey.

Reticulum 2: Gamma Rays from Dwarf Galaxy May Be Clue on Mysterious Dark Matter

Mar 11, 2015 by News Staff

A team of astronomers, led by Dr Alex Geringer-Sameth of Carnegie Mellon University, has detected gamma rays emanating from the recently discovered dwarf...

This is an artist's impression of a gamma-ray burst. Image credit: NASA.

Astronomers Discover New Kind of Gamma-Ray Burst

Dec 24, 2013 by News Staff

Australian researchers have discovered a new type of gamma-ray burst (GRB) called radio faint GRB. This is an artist’s impression of a gamma-ray...

This artist's conception portrays two neutron stars at the moment of collision. Such collisions produce rare heavy elements, including gold (Dana Berry / SkyWorks Digital, Inc.)

Gold on Earth Came from Colliding Stars, Astrophysicists Say

Jul 18, 2013 by News Staff

According to new research by Dr Edo Berger and his colleagues at the Harvard-Smithsonian Center for Astrophysics, all Earth’s gold likely came from...

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