Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



STELLAR CHEMISTRY
Waterloo Researchers Capture First "Image" of a Dark Matter Web that Connects Galaxies
by Staff Writers
Waterloo, Canada (SPX) Apr 13, 2017


Dark matter filaments bridge the space between galaxies in this false colour map. The locations of bright galaxies are shown by the white regions and the presence of a dark matter filament bridging the galaxies is shown in red. Image courtesy S. Epps and M. Hudson / University of Waterloo.

Researchers at the University of Waterloo have been able to capture the first composite image of a dark matter bridge that connects galaxies together. The scientists publish their work in a new paper in Monthly Notices of the Royal Astronomical Society.

The composite image, which combines a number of individual images, confirms predictions that galaxies across the universe are tied together through a cosmic web connected by dark matter that has until now remained unobservable.

Dark matter, a mysterious substance that comprises around 25 per cent of the universe, doesn't shine, absorb or reflect light, which has traditionally made it largely undetectable, except through gravity.

"For decades, researchers have been predicting the existence of dark-matter filaments between galaxies that act like a web-like superstructure connecting galaxies together," said Mike Hudson, a professor of astronomy at the University of Waterloo. "This image moves us beyond predictions to something we can see and measure."

As part of their research, Hudson and co-author Seth Epps, a master's student at the University of Waterloo at the time, used a technique called weak gravitational lensing, an effect that causes the images of distant galaxies to warp slightly under the influence of an unseen mass such as a planet, a black hole, or in this case, dark matter. The effect was measured in images from a multi-year sky survey at the Canada-France-Hawaii Telescope.

They combined lensing images from more than 23,000 galaxy pairs located 4.5 billion light-years away to create a composite image or map that shows the presence of dark matter between the two galaxies. Results show the dark matter filament bridge is strongest between systems less than 40 million light years apart.

"By using this technique, we're not only able to see that these dark matter filaments in the universe exist, we're able to see the extent to which these filaments connect galaxies together," said Epps.

"The weak-lensing masses of filaments between luminous red galaxies" by Epps and Hudson was published in Monthly Notices of the Royal Astronomical Society

Research paper

STELLAR CHEMISTRY
Satellite galaxies at edge of Milky Way coexist with dark matter
Rochester NY (SPX) Mar 31, 2017
Research conducted by scientists at Rochester Institute of Technology rules out a challenge to the accepted standard model of the universe and theory of how galaxies form by shedding new light on a problematic structure. The vast polar structure - a plane of satellite galaxies at the poles of the Milky Way - is at the center of a tug-of-war between scientists who disagree about the existen ... read more

Related Links
University of Waterloo
Stellar Chemistry, The Universe And All Within It


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

STELLAR CHEMISTRY
Two Russians, one American land back on Earth from ISS

You Say Tomato, I Say Tomatosphere: ISS Science to the Classroom

NASA Invests in 22 Visionary Exploration Concepts

No Roscosmos plans to send space tourists to ISS before 2020

STELLAR CHEMISTRY
Dream Chaser to use Europe's next-generation docking system

Europe's largest sounding rocket launched from Esrange

Bezos sells $1 bn in Amazon stock yearly to pay for rocket firm

US-Russia Venture Hopes to Sell More RD-180 Rocket Engines to US

STELLAR CHEMISTRY
Mars spacecraft's first missions face delays, NASA says

Opportunity Mars rover on the way to Perseverance Valley

France, Japan aim to land probe on Mars moon

NASA's MAVEN reveals Mars has metal in its atmosphere

STELLAR CHEMISTRY
Yuanwang fleet to carry out 19 space tracking tasks in 2017

China Develops Spaceship Capable of Moon Landing

Long March-7 Y2 ready for launch of China's first cargo spacecraft

China Seeks Space Rockets Launched from Airplanes

STELLAR CHEMISTRY
Airbus and Intelsat team up for more capacity

Commercial Space Operators To Canada: "We're Here, and We can Help"

Antenna Innovation Benefits the Government Customer

Ukraine in talks with ESA to become member

STELLAR CHEMISTRY
Humans to Mars Official NASA Goal, But What About Radiation

Recent advances and new insights into quantum image processing

NASA Fellow studies new heatshield-making technique

Despite EU fines, Greece struggling to promote recycling

STELLAR CHEMISTRY
The earliest animals were marine jellies

Scientists look for life's building blocks in outer space

Earth-Sized 'Tatooine' Planets Could Be Habitable

Distantly related fish find same evolutionary solution to dark water

STELLAR CHEMISTRY
ALMA investigates 'DeeDee,' a distant, dim member of our solar system

Nap Time for New Horizons

Hubble spots auroras on Uranus

Cold' Great Spot discovered on Jupiter




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement