Cosmic Oddity Explained: Astrophysicists Discover Why Our Supergalactic Plane Lacks Spiral Galaxies

Milky Way Galaxy

Astrophysicists have discovered why spiral galaxies like the Milky Way are rare in the Supergalactic Plane, a dense region in our Local Universe. The research, led by Durham University and the University of Helsinki, used the SIBELIUS supercomputer simulation to show that galaxies in dense clusters on the Plane often merge, transforming spiral galaxies into elliptical ones. This finding, which aligns with telescope observations and supports the standard model of the Universe, helps explain a long-standing cosmic anomaly about galaxy distribution.

Astrophysicists say they have found an answer to why spiral galaxies like our own Milky Way are largely missing from a part of our Local Universe called the Supergalactic Plane.

The Supergalactic Plane is an enormous, flattened structure extending nearly a billion light years across in which our own Milky Way galaxy is embedded.

While the Plane is teeming with bright elliptical galaxies, bright disk galaxies with spiral arms are conspicuously scarce.

Now an international team of researchers, co-led by Durham University, UK, and the University of Helsinki, Finland, say different distributions of elliptical and disk galaxies arise naturally due to the contrasting environments found inside and outside the Plane.

Elliptical and Spiral Galaxy

This image, showing an elliptical galaxy (left) and a spiral galaxy (right) includes near-infrared light from the James Webb Space Telescope, and ultraviolet and visible light from the Hubble Space Telescope. Credit: NASA, ESA, CSA, Rogier Windhorst (ASU), William Keel (University of Alabama), Stuart Wyithe (University of Melbourne), JWST PEARLS Team, Alyssa Pagan (STScI)

Galaxy Evolution in Dense Clusters

In the dense galaxy clusters found on the Supergalactic Plane, galaxies experience frequent interactions and mergers with other galaxies. This transforms spiral galaxies into elliptical galaxies – smooth galaxies with no apparent internal structure or spiral arms – and leads to the growth of supermassive black holes.

By contrast, away from the Plane, galaxies can evolve in relative isolation, which helps them preserve their spiral structure.

Innovative Simulations and Key Findings

The findings are published in the journal Nature Astronomy.

The Milky Way is part of the Supergalactic Plane, which contains several massive galaxy clusters and thousands of individual galaxies. The vast majority of galaxies found here are elliptical galaxies.

The research team used the SIBELIUS (Simulations Beyond the Local Universe) supercomputer simulation, which follows the evolution of the Universe over 13.8 billion years from the early Universe to the present day.

Distribution of the Brightest Galaxies in the Local Universe

Distribution of the brightest galaxies in the Local Universe, observed in the 2MASS survey (left panel) and reproduced in the SIBELIUS simulation (right panel). Both panels show projections in supergalactic coordinates, out to approximately 100 Megaparsec (Mpc). The nearly vertical empty stripe represents the region of the sky hidden behind our own Milky Way galaxy. The simulation accurately reproduces the structures seen in the Local Universe. Credit: Dr Till Sawala

While most cosmological simulations consider random patches of the Universe, which cannot be directly compared to observations, SIBELIUS aims to precisely reproduce the observed structures, including the Supergalactic Plane. The final simulation is remarkably consistent with observations of our Universe through telescopes.

Contributions and Implications of the Research

Research co-author Professor Carlos Frenk, Ogden Professor of Fundamental Physics, in the Institute for Computational Cosmology, Durham University, said: “The distribution of galaxies in the Supergalactic Plane is indeed remarkable.

“It is rare but not a complete anomaly: our simulation reveals the intimate details of the formation of galaxies such as the transformation of spirals into ellipticals through galaxy mergers.

“Further, the simulation shows that our standard model of the Universe, based on the idea that most of its mass is cold dark matter, can reproduce the most remarkable structures in the Universe, including the spectacular structure of which the Milky Way is part.”

The peculiar separation of spiral and elliptical galaxies in the Local Universe, which has been known about since the 1960s, features prominently in a recent list of “cosmic anomalies” compiled by renowned cosmologist and 2019 Nobel laureate Professor Jim Peebles.

Research lead author Dr. Till Sawala, a postdoctoral researcher at Durham University and at the University of Helsinki, said: “By chance, I was invited to a symposium in honor of Jim Peebles last December at Durham, where he presented the problem in his lecture.

“And I realized that we had already completed a simulation that might contain the answer. Our research shows that the known mechanisms of galaxy evolution also work in this unique cosmic environment.”

Reference: “Distinct distributions of elliptical and disk galaxies across the Local Supercluster as a ΛCDM prediction” by Till Sawala, Carlos Frenk, Jens Jasche, Peter H. Johansson and Guilhem Lavaux, 20 November 2023, Nature Astronomy.
DOI: 10.1038/s41550-023-02130-6

The supercomputer simulations were performed on the Cosmology Machine (COSMA 8) supercomputer, hosted by the Institute for Computational Cosmology at Durham University on behalf of the UK’s DiRAC High-Performance Computing facility and on CSC’s Mahti supercomputer in Finland.

The research was funded by the European Research Council, the Academy of Finland and the UK Science and Technology Facilities Council.

5 Comments on "Cosmic Oddity Explained: Astrophysicists Discover Why Our Supergalactic Plane Lacks Spiral Galaxies"

  1. dr mehrdad kesiri | December 23, 2023 at 8:06 am | Reply

    Is God’s structure important to you?No, it is not very important.Humans are involved in life.There are more important issues on earth that humans are involved in. One of these issues is religion and metallurgy that involve humans, but I say that if humans understand that religions are not God’s.then what is your opinion?I have discovered the nature of the Lords of the world.The Lord and God found me the master of time and entrusted all the secrets of the earth and the hidden secrets of religions to me.Bardham, one of these secrets is the shape of the seas and the demarcation of countries, which have been changed in the shape of creatures, by whom, these changes were made in the past, these changes were made by humans who lived on earth beforeus, and these changes were made for us.That is, what has happened to us, that is, humans knew that when meteorites fell several thousand meters on the entire surface of the oceans and the earth and life was destroyed, after a few million years, they knew that the earth would have intelligentmammals again, that the life of this planet would be renewed, hence the word planet.Persian has renewal, and renewal in Persian culture means again and repetition, that is, the life of the earth repeats itself after its destruction, the life on the earth increases from bacteria to a single cell, the life of the earth is due to therotation of the sun around the galaxy and the collision of the two big arms of the galaxy with the sun.Renewed, I explained in the previous discussions and talks about the collision of star systems with two large arms of the galaxy to the sun.I had asked you what the speed of the two large arms of the galaxy is, they told me that the speed of the arm of the galaxy is 220 km/s, but this It is impossible, I know that the speed of the arm ofthe galaxy must be higher than the sun.If the sun was moving with the big arm of the galaxy, that is, if the speed of the sun was the same as the big arm of the galaxy, thousands of very small stars would not have collided with gas planets like Jupiter.Those stars of the arm of the galaxy and There are no rocky planets in the solar system.Why do you believe that no planet has hit Venus and Mercury?I know that Venus has been hit by several small planets.Fewer planets have hit Mercury compared to Venus.Venus and the planet Mercury have caused the movement of Venus to reverse around itself.I said before that whenever a planet collides with a planet, the movement of the two planets slows down, and if there are more collisions and the impact of the two planets on each other increases, it causes the rotation of the planet to slow down.And it will be reversed if the arm of the galaxy does not arise from the solar bodies, that is, if there was no collision between the solar bodies and the two arms of the galaxy, and there was no moon next to the planets, andno planet slowed down the rotation of Venus and Mercury, that means there was a collision with the planets Venus and Mercury, and the collision of the stars There is an arm of the galaxy to gas planets, collision of small stars with gas planets has causedJupiter to continue burning, and hydrogen gas in gas planets, which are four in the solar system, has caused the hydrogen gas of small stars to be transferred to these gas planets, Dr. Mehrdad Sahib Zaman and Chosen by the Lords of the Persian language

    I apologize, I have to explain about the text I wrote.When I translated it by Google, I realized that the text of the text is transposed in the verb and subject.I hope you understand the general meaning of the above text.If you don’t understand something, please let me know.Send a text message to my mobile number because my email has been blocked by the non-halal regime of the Islamic Brotherhood good BY time in iran 7:36 pm

  2. Good luck with your challenges. One day you will be at peace and rest forever.

  3. Things happen, don’t overthink it. Good luck with your challenges.


  5. The Fear you have is not science it is manipulation and the computer that you use is a tool that has become a science project of information transfer, your love of GOD can seem to be threatened but the true sense is a Fear, stay true to your heart for LIFE will always show challenges to your faith, call faith a personal challenge and spread your kindness not descent, happiness not your rage, a nature of wonder not closer.

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