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Complicated dynamics of dwarf galaxies.

    Complicated dynamics of dwarf galaxies. 


New research suggests that most dwarf galaxies are destroyed when they enter spiral galaxies super hot halo. The galactic halo is similar to the corona around the sun and other stars. But gas is much thinner than in corona. The particle's speed is also much higher than in the corona. In that halo the particle's speed is so high that they from electromagnetic shockwave when they enter to dwarf galaxies gas and hit particles in that small galaxy. 

The shockwave, along with the giant galaxy's gravity rips the dwarf galaxy in pieces. And gravity pulls gas and dust away from those dwarf galaxies. But sometimes dwarf galaxies can keep their form when they enter galaxies like the Milky Way halo. That thing requires that gravity can win those electromagnetic shockwaves and keep dwarf galaxies in their form. In modern models inside the dwarf galaxies is also a black hole, the material center that keeps them in form. In models at least flat or spiral-shaped dwarf galaxies "dwarf milky ways" should involve material center that is like Sagittarius A, but far smaller. 

In some models, the supermassive black hole in the middle of the Milky Way and other large spiral galaxies can form wormholes to that dwarf galaxy's black hole. And then energy will travel to that point. And it may affect the power of the relativistic jet that leaves that smaller black hole. Relativistic jet will ionize material around it and the same time raise the material's energy level around it. That energy rips the galaxy into pieces if gravity cannot keep it in form.


"A new study based on Gaia satellite data reveals that dwarf galaxies around the Milky Way are likely transient and not as dark matter-rich as previously thought. Their recent entry into the Galactic halo and rapid loss of gas challenges existing beliefs about their stability and composition." (ScitechDaily.com/Redefining Cosmic Norms: Dwarf Galaxies and the Dark Matter Enigma)


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"Video from a simulation of the transformation of a gas-rich and rotation-dominated galaxy into a spherical dwarf galaxy after it first enters the Milky Way halo. Here an analogue of the Sculptor dwarf galaxy is shown, with the gas represented in blue and stars in orange". 

"The gas is stripped when the dwarf is closest to the Milky Way (distance shown in the upper right corner), resulting in a rapid expansion of the stars. The model thus predicts a large envelope of distant stars around the remnant of the dwarf galaxy. However, fading to the depth of optical observations illustrates that this envelope of stars is too faint to be easily detected. Credit: Jianling Wang, François Hammer" (ScitechDaily.com/Redefining Cosmic Norms: Dwarf Galaxies and the Dark Matter Enigma)


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Dwarf galaxies around the Milky Way. Credit: ESA/Gaia/DPAC


When we think of the model where a flat galaxy turns to a spherical (commonly elliptic) galaxy, we must first realize that in flat galaxy should be some kind of mass center. The energy rise or some kind of vaporization of the black hole turns galaxy spherical. The difference between star clusters and galaxies is sometimes determined that in star clusters is no star formation. 

Stars are forming in dwarf galaxies. So maybe the gravity of the Milky Way class galaxy strips gas and dust away from the dwarf galaxy stopping the star formation and turning it into a spherical star cluster. In this time difference between spherical star clusters and spherical galaxies is this. In spherical galaxies, star formation continues. And in star clusters are no new stars. 


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This means the dwarf galaxy turns into a globular star cluster. "The origin of globular clusters and their role in galactic evolution are unclear. Some are among the oldest objects in their galaxies and even the universe, constraining estimates of the universe's age. "

"Star clusters were formerly thought to consist of stars that all formed at the same time from one star-forming nebula, but nearly all globular clusters contain stars that formed at different times, or that have differing compositions. Some clusters may have had multiple episodes of star formation, and some may be remnants of smaller galaxies captured by larger galaxies". (Wikipedia/Globular cluster)


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But it's possible. That straight energy rise in a black hole's material disk can make the same thing. And in that model, there is no need for the wormhole. Dwarf galaxies have also their halo. When it enters the spiral galaxy's halo those halos start the interaction. In that interaction, energy starts to travel from the giant spiral galaxy's halo to a smaller and colder halo. 

That halo or gas ball in a dwarf galaxy transports energy to the dwarf galaxy's black hole's transition disk. That raises that material disk temperature, and that energy pushes particles away. 

The dwarf galaxies can also uncover the mystery of dark matter. If there is lots of dark matter in some dwarf galaxies that thing explains why Milky Way and other larger spiral galaxies don't rip them in pieces. But as I wrote as a headline, the interaction of dwarf galaxies is complicated. 


https://universe.nasa.gov/galaxies/types/


https://scitechdaily.com/redefining-cosmic-norms-dwarf-galaxies-and-the-dark-matter-enigma/


https://en.wikipedia.org/wiki/Star_cluster


https://en.wikipedia.org/wiki/Globular_cluster

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