Alternative MethodsConventional Methods


March 29

Astronomers Capture the First ‘Image' of the Dark Matter That Holds the Universe Together

Javier Bush
Core Spirit member since Dec 24, 2020
Reading time 4 min.

Researchers have produced what they say is the first composite image of a dark matter filament that connects galaxies across the cosmos.

For decades, scientists have tracked hints of a thread-like structure that ties together galaxies across the universe. Theories, computer models, and indirect observations have indicated that there is a cosmic web of dark matter that connects galaxies and constitutes the large-scale structure of the cosmos. But while the filaments that make up this web are massive, dark matter is incredibly difficult to observe.

Now, researchers have produced what they say is the first composite image of a dark matter filament that connects galaxies together.

“This image moves us beyond predictions to something we can see and measure,” said Mike Hudson, a professor of astronomy at the University of Waterloo in Canada, co-author of a new study published in the Monthly Notices of the Royal Astronomical Society.

Dark matter, an elusive substance that is estimated to make up around 27 percent of the universe, doesn’t give off, reflect, or absorb light. This has made it virtually impossible to detect, except for its effects when it exerts a gravitational tug or when it warps the light of distant galaxies in what is called gravitational lensing.

For their work, Hudson and co-author Seth Epps, who was a master’s student at the University of Waterloo at the time of the research, employed a technique called weak gravitational lensing — a statistical measurement of the slight bends that occur in the path of light passing near mass. The effect produces illustrations of galaxies that appear slightly warped owing to the presence of celestial mass, such as dark matter.

Dark matter, an elusive substance that is estimated to make up around 27 percent of the universe, doesn’t give off, reflect, or absorb light. This has made it virtually impossible to detect, except for its effects when it exerts a gravitational tug or when it warps the light of distant galaxies in what is called gravitational lensing.

For their work, Hudson and co-author Seth Epps, who was a master’s student at the University of Waterloo at the time of the research, employed a technique called weak gravitational lensing — a statistical measurement of the slight bends that occur in the path of light passing near mass. The effect produces illustrations of galaxies that appear slightly warped owing to the presence of celestial mass, such as dark matter.

“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.”

In their paper, they explained that in order to study the weak lensing signal of the dark matter filaments, they required two sets of data: a catalog of galaxy cluster pairs that were lensed, and a catalog of background source galaxies with accurate distance measurements.

They combined lensing data from a multi-year sky survey at the Canada-France-Hawaii Telescope with information from the Sloan Digital Sky Survey that mapped luminous red galaxies (LRGs), which are massive, distant, and very old galaxies.

“LRGs are very bright galaxies,” Hudson told Seeker via email. “They tend to be more massive than the average galaxy and live in more massive dark matter ‘halos.’ It’s reasonable to expect that the filament or bridge between them might also be more massive than the average.”

Hudson and Epps combined or “stacked” more than 23,000 galaxy pairs, all located about 4.5 billion light-years away. This allowed them to create a composite image or map that shows the presence of dark matter between galaxies. Hudson told Seeker that the filament in their “image” is the average of all 23,000 pairs.

“The primary reason that we used these galaxies is that they had precise distances (as measured by another team),” Hudson explained. “These distance measurements allowed us to distinguish between pairs of galaxies that were actual pairs in 3D (meaning both are at the same distance from us) as opposed to two galaxies that appeared close on the sky but were actually at very different distances.”

3D pairs would be physically close to each other and hence, will have a bridge whereas the second group are not physically close to each other, and so would not have a bridge between them. Hudson and Epps said their 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,” Epps said in a statement.

The Big Bang theory predicts that variations in the density of matter in the very first moments of the universe led the bulk of the matter in the cosmos to condense into a web of tangled filaments. To explain this, astronomer Fritz Zwicky first introduced the concept of dark matter in 1933, when his measurements of galaxies moving within a galaxy cluster showed they must have at least ten times more invisible matter than what is visible.

But it wasn’t until the 1970s that dark matter was taken seriously. Vera Rubin and Kent Ford Jr. mapped the motions of stars within galaxies close to our own Milky Way, and they also concluded that each galaxy had to include enormous amounts of unseen matter, far more than all the visible matter. Later, computer simulations confirmed this and suggested the existence of dark matter, structured like a web, with long filaments that connect to each other at the locations of massive galaxy clusters.

In their paper, Hudson and Epps list dozens of previous studies that have attempted to measure and observe the dark matter web, and they say they hope their stacking techniques to measure the filaments between groups and clusters of galaxies can serve as a foundation for future filament studies. They hope upcoming surveys and telescopes will continue to further our understanding of dark matter.

via Seeker

Comments

Leave your questions here

To write a comment you must
or
Services
Category filter
Concern filter
Type filter
Sort
 

All categories

Spiritual Healing
$222 USD
Healing from Trauma at a Quantum Soul Level

Are you burnt out from clinical therapy practices that require years of treatment with few results? Are you ready to release and transmute your trauma once and…

LunaRio Silver Deer
Spiritual Healing
$10 USD
I will do spiritual transformation for you

I will do spiritual transformation. Life occurs as a series of cycles in a single human lifetime. Cycles exist in almost a spiral pattern. There is a flow and …

Wisdom Realms
Career Coaching
$499 USD
Reset 1-0n1 Coaching and Mentoring Programme

Are you returning to work after a career break, or are you looking for a new job or career change?

This programme is for you.

I’ve developed the RESET coachi…

Carla Martins
Life Coaching
$399 USD
1-on-1 Coaching

The journey started with our discovery call, and You decided: ” I’m ready! Let’s do this!”.

We will engage in 1-on-1 coaching sessions for 90 minutes. In this…

Carla Martins
Emotional Stress Release
$800 USD
Retreat( India): Connect With Your Inner Wisdom 1st to 4th Sept

Join us for an immersive experience anchored amidst the beauty and tranquillity of Kasar Devi, Almora, India

1st Sept’22 ( Thursday) - 4th Sept 2022 ( Sunday …

Aikyam
Psychic Reading
$80 USD
I will do oracle and tarot card readings

I will do oracle & tarot card reading in any area of your life. You will get answer from the Angelic, Elemental, Faerie or Galactic realms. I will share wi…

Wisdom Realms
Natal Astrology
$15 USD
15 min reading of SOUL structure

[SOUL STRUCTURE]Each soul has own structure,and knowing it means to have unlimited access to inner energy. This readings are telling about your talents and str…

Ksenia Jdanova
Wellness Coaching
$10 USD
Ask a Question?

Supportive reflection of a current question that you would like clarity around. Using the SMART method to seek quidance in stepping onto your path of potential…

Beverly Lynn
Reiki
$150 USD
Reiki Services (distant healing session)

In this hour long distant healing session I will use long distance Reiki, crystals and essential oils to balance your Chakras. Balancing your Chakras allows en…

Erin Kirby
Tarot Reading
$10 USD
Intuitive Tarot Reading

Affordable Tarot reading to offer guidance on any given concern.

Elphie Shoppe
Telepsychology
$10 USD
Talk Therapy Sessions

Hello there: These times are dread. Do you need to talk with a safe professional about a troubling personal challenge? I am a professional listener and will li…

Eulalee Thompson
Tarot Reading
$10 USD
Tarot Reading

I offer tarot readings with a 100% accuracy rate. The tarot is meant to give you advice, to point you in the right direction or to provide you with clarity. Bu…

Zara Kalil
Angel Healing
$10 USD
Mental Health Advice & Tips

I can help you with past issues and give advice and tips on how to better your life. I can see through my third eye and receive messageson what you need to do …

Beings Of Light
Life Coaching
$10 USD
Discovery call

Are you interested in supporting your health with safe and effective holistic medicine? Not sure if you should switch diets, work with a health coach or explor…

Suzana Da Costa
Wellness Coaching
$50 USD
Mental Health and Holistic Lifestyle Coaching

Hi there! I’m Doug and I offer 1 on 1 Holistic Lifestyle and Mental Health Coaching sessions. Navtigating life with mental health issues of any sevarity is a h…

Doug Peterson
Wellness Coaching
$10 USD
Mental Health and Holistic Lifestyle Coaching Consultation

Hi there! I’m Doug and I offer 1 on 1 Holistic Lifestyle and Mental Health Coaching sessions. Navtigating life with mental health issues of any sevarity is a h…

Doug Peterson
Family Psychology
$10 USD
Psychic Reading

Expert in Love Relationship, Tarot Psychic Reading
I can give you more powerful insight of every part of your life. With the help of Crystal ball my Psychic re…

Aamir Bilal
Career Coaching
$195 USD
Holistic Lifestyle & Nutrition Coaching

ARE YOU TIRED? STRESSED OUT? STRUGGLING WITH YOUR WEIGHT? UNDER SLEPT?
LOST YOUR ZEST FOR LIFE?

If this sounds like you, then you don’t need a new diet… you n…

David Giddings
Bach flower therapy
$120 USD
Bach Flower Essence Consultation

Exploration of where you’re feeling stuck or limited in life and recommendations of Bach Flower Essences to help loosen and dissolve old patterns.

Suzana Da Costa
Cognitive-behavioral therapy
$100 USD
Subliminal therapy

In this service we will use Subliminal therapy and Sound healing as alternative to tradition cognitive behavioral therapy.

We are born with our thoughts. Do n…

Ahmed Amin Youssef
Spiritual Healing
$10 USD
Intro 2 Alignment Healing Chant

Namaste.

That is my greeting to the spirit within you. Join me for a welcome introduction session to celebrate my arrival at Core Spirit!

For 15 minutes I wi…

Ti3rc3 Fire
Mediumism
$55 USD
Psychic Medium Readings

READINGS
Currently, all readings will be offered virtually.
Appointments are available on Tuesday and Thursday mornings between 9am-1pm (UK Time Zone).
When we…

Jan Morgan
Oracle Cards Reading
$25 USD
Psychic Reading 15 Minutes

Well-versed in the main 5 clairs, I will Intuitively answer your questions for 15 minutes.

Jyll Hoyrup
Emotional Stress Release
$150 USD
Creatrix® Breakthrough

This is a revolutionary process, SPECIALLY designed for women. You will be able to clear your most depeest BLOCKS and limiting beliefs. 

This is the only too…

Tamar Viva

Related Articles