Tag Archive for 'Dark matter'

Composite image of the gravitational lens SDP.81 showing the distorted ALMA image of the more distant galaxy (red arcs) and the Hubble optical image of the nearby lensing galaxy (blue center object). By analyzing the distortions in the ring, astronomers have determined that a dark dwarf galaxy (data indicated by white dot near left lower arc segment) is lurking nearly 4 billion light-years away. Image credit: Y. Hezaveh, Stanford University / ALMA / NRAO / ESO / NAOJ / NASA / ESA / Hubble Space Telescope.

Astronomers Spot Dwarf Dark-Matter Dominated Galaxy 4 Billion Light-Years Away

Apr 15, 2016 by News Staff

Analysis of the very high resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of the gravitational lens SDP.81 reveals a dwarf...

This slab cut from the cube generated by the Illustris simulation shows the distribution of baryonic (normal) matter, with a width and height of 350 million light-years and a thickness of 300,000 light-years. Image credit: Markus Haider / Illustris Collaboration.

Supermassive Black Holes Transport Matter into Cosmic Voids, Astronomers Say

Feb 25, 2016 by News Staff

Cosmic voids — vast underdense regions, forming an essential feature of the cosmic web and occupying most of the volume of the Universe — could...

An artist’s impression of FRB 110523 reaching Earth; the colors represent the burst arriving at different radio wavelengths, with long wavelengths (red) arriving seconds after short wavelengths (blue). Image credit: Jingchuan Yu / Beijing Planetarium.

Astronomers Detect Host Galaxy of Fast Radio Burst for the First Time

Feb 25, 2016 by Enrico de Lazaro

An international team of astronomers reported today that they had tracked down the location of a so-called fast radio burst (FRB), a mysterious and rarely...

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...

This illustration shows Earth surrounded by dark matter hairs. Image credit: NASA / JPL-Caltech.

Earth Might Be Surrounded by Dark Matter ‘Hairs’

Nov 24, 2015 by Enrico de Lazaro

Our planet, Jupiter and other compact bodies are surrounded by ultra-dense filaments of dark matter called ‘hairs,’ suggests Dr Gary Prézeau of NASA’s...

This image shows Abell 3827, a massive galaxy cluster approximately 1.3 billion light years away. The blue structures surrounding the central galaxies are gravitationally lensed views of a much more distant galaxy behind the cluster. Observations of the central four merging galaxies have provided hints that the dark matter around one of the galaxies is not moving with the galaxy itself, possibly implying dark matter-dark matter interactions of an unknown nature are occurring. Image credit: ESO.

Astronomers Observe Potential Signs of Self-Interacting Dark Matter

Apr 15, 2015 by News Staff

Using the NASA/ESA Hubble Space Telescope and the MUSE instrument on ESO’s VLT in Chile, an international group of scientists led by Dr Richard Massey...

This map shows the detailed distribution of dark matter across a large area of sky. The color scale represents projected mass density: red and yellow represent regions with more dense matter. Clusters of galaxies are represented by gray dots on the map - bigger dots represent larger clusters. The insets are images of two galaxy clusters and a cosmic void. Image credit: Dark Energy Survey.

Scientists Create Dark Matter Map

Apr 14, 2015 by News Staff

Researchers using data from the Dark Energy Camera (DEC) – an imaging device that is the primary instrument for the Dark Energy Survey – have...

This Hubble image shows the galaxy cluster MACS J0416.1-2403; shown in blue is a map of the dark matter found within the cluster. Image credit: NASA / ESA / D. Harvey / R. Massey / HST Frontier Fields.

Colliding Galaxy Clusters Offer Clues to Dark Matter

Mar 26, 2015 by News Staff

An international team of astronomers led by Dr David Harvey of the Observatory of Sauverny in Switzerland and the University of Edinburgh, UK, has studied...

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 artist's impression shows the structure of our Milky Way Galaxy, including the location of the spiral arms and other components such as the bulge. Image credit: NASA / JPL-Caltech / ESO / R. Hurt.

Dark Matter May Have Caused Earth’s Cataclysms, Mass Extinctions

Feb 20, 2015 by News Staff

The Solar System’s movement through a dark-matter halo enveloping our Milky Way Galaxy may perturb the orbits of comets and lead to additional heating...

Resembling looming rain clouds on a stormy day, dark lanes of dust crisscross the giant elliptical galaxy NGC 5128, also known as Centaurus A. The warped shape of NGC 5128’s disk of gas and dust is evidence for a past collision and merger with another galaxy. The resulting shockwaves cause hydrogen gas clouds to compress, triggering a firestorm of new star formation. At a distance of just over 11 million light-years, NGC 5128 contains the closest active galactic nucleus to Earth. The center is home for a supermassive black hole that ejects jets of high-speed gas into space, but neither the supermassive black hole or the jets are visible in this image. Image credit: NASA / ESA / Hubble Heritage / STScI / AURA / Hubble Collaboration / R. O'Connell, University of Virginia / WFC3 Scientific Oversight Committee.

Dark Matter Influences Growth of Galaxies’ Central Supermassive Black Holes

Feb 20, 2015 by News Staff

A new study of elliptical galaxies led by Dr Akos Bogdan of the Harvard-Smithsonian Center for Astrophysics has revealed a surprising link between galaxies’...

This Hubble composite image shows a ring of dark matter in the galaxy cluster ZwCl0024+1652; the ring-like structure is evident in the blue map of the cluster's dark matter distribution; the map is superimposed on a Hubble image of the cluster. Image credit: NASA / ESA / M.J. Jee and H. Ford, Johns Hopkins University.

X-Ray Signal from Andromeda, Other Galaxies Could Be Evidence of Dark Matter

Dec 12, 2014 by News Staff

European scientists have detected a mysterious photon emission in X-ray spectra of the Andromeda galaxy, the Draco dwarf galaxy and some other galaxies...

Concept of a dark-matter search using atomic clocks; by monitoring time discrepancies between two spatially separated clocks one could search for the passage of topological defects, such as the domain wall pictured here. Image credit: A. Derevianko & M. Pospelov.

GPS Might be Tool in Detecting Mysterious Dark Matter, Physicists Say

Nov 18, 2014 by News Staff

Two physicists – Dr Maxim Pospelov from the University of Victoria and Prof Andrei Derevianko of the University of Nevada, Reno – have proposed...

An artist's conception of a Majorana fermion floating at the surface of the Fermi sea. Image credit: Alexey Drjahlov.

Majorana Fermion: Physicists Observe Elusive Particle

Oct 6, 2014 by News Staff

The Majorana fermion – a mysterious particle that is its own antiparticle – has been observed for the first time. An artist’s conception...

X-ray image of the Perseus galaxy cluster: a new study of the cluster has revealed a mysterious X-ray signal; this signal is represented in the circled data points in the inset, which is a plot of X-ray intensity as a function of X-ray energy. Image credit: Chandra / NASA / CXC / SAO / XMM / ESA / E. Bulbul et al.

Astronomers Detect Mysterious X-ray Signal in Andromeda Galaxy, 74 Galaxy Clusters

Jun 26, 2014 by News Staff

Astronomers using ESA’s XMM-Newton and NASA’s Chandra X-ray observatories have detected an unidentified X-ray emission line – a spike...

This image shows the Tadpole galaxy (Arp 188), a disrupted barred spiral galaxy located 420 million light-years from our planet. Material stripped from the galaxy during its collision with a smaller galaxy (seen in the upper left corner of the larger interaction partner) forms a long tidal tail. Young blue stars, star clusters and tidal dwarf galaxies are born in the tidal debris. These objects move in a common direction within a plane defined by the orientation and motion of their tidal tail. A similar galaxy interaction might have occurred in the Local Group in the past, which could explain the distribution of dwarf galaxies in co-rotating planes. Image credit: H. Ford, JHU / M. Clampin, STScI / G. Hartig, STScI / G. Illingworth, UCO, Lick / ACS Science Team / ESA / NASA.

Nearby Dwarf Galaxies Don’t Fit Standard Model of Cosmology, Study Says

Jun 11, 2014 by News Staff

According to a study led by Dr Marcel Pawlowski of Case Western Reserve University in Ohio, dwarf galaxies that orbit our Milky Way Galaxy and the Andromeda...

This computer simulation visualizes dark matter halo (Heidi Wu / Oliver Hahn / Risa Wechsler / Ralf Kaehler / Kavli Institute for Particle Astrophysics and Cosmology)

Dark Matter May Be Made Out of Majorana Fermions, Say Physicists

Jun 11, 2013 by News Staff

In a paper published online in the journal Physics Letters B (arXiv.org’s version), theoretical physicists from Vanderbilt University propose that dark...

The International Space Station taken during STS-134 mission's fourth spacewalk. The Alpha Magnetic Spectrometer (AMS) was installed one week earlier during the mission's first spacewalk (NASA)

Antimatter Hunter aboard International Space Station Detects Hints of Dark Matter

Apr 4, 2013 by Natali Anderson

An international team of scientists using the Alpha Magnetic Spectrometer aboard the International Space Station has announced the first results in the...

Giant Filament of Dark Matter Mapped in 3D

Oct 18, 2012 by Sergio Prostak

An international team of astronomers using NASA’s Hubble Space Telescope has studied a filament of dark matter in three dimensions for the first time. This...

Largest Ever 3D Map of Sky Released

Aug 9, 2012 by Sergio Prostak

Astronomers have constructed the largest-ever 3D map of massive galaxies and distant black holes, which will help better explain the mysterious ‘dark...

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