The Sombrero Galaxy halo shows a turbulent past, Surprising new data from NASA’s Hubble Space Telescope shows that the smooth and neat borders of the Sombrero galaxy can cover its turbulent past.
The sharpness and sensitivity of Hubble allowed tens of thousands of stars to separate in the vast Sombrero circle, an area outside the central galaxy that usually consists of older stars.
Sombrero’s recent observation reverses conventional theory, revealing only a small fraction of old stars, low metals in the atrium, as well as the unexpected abundance of metal-rich stars normally found only on galaxy discs and at the center of convexity. The fusion of large galaxies of the past is a possible explanation, although the adorable sombrero shows no evidence that is scattered from recent large-scale galaxies. The Sombrero Galaxy halo shows a turbulent past.
Sombrero has always been a strange galaxy which makes it very interesting.
Hubble metal measurements (eg frequency of heavy elements in stars) are another indication that sombrero can teach us a lot about the structure and evolution of galaxies.
The Sombrero Galaxy (M104), which has long been loved by astronomers and sky watchers for its striking beauty and strange structure, has opened a new chapter in its strange history – a halo circle consisting of rich metal stars with almost imperceptible marks seen from estimates. evil stars observed in other galactic halos.
The Hubble data puzzle has turned to sophisticated computer models to provide an explanation for the confusing reversal of conventional galaxy theory.
These results point to the surprising possibility of a greater merger in the past of the galaxy, although the majestic structure of Sombrero shows no evidence of recent destruction.
In halo galaxies, astronomers expect previous generations of stars with less heavy elements, known as metals, than the crowded star cities on the main galaxy discs.
The elements are created by the star’s life cycle process. The longer a galaxy leads the star through this cycle, the richer the gas element is and the higher the acidity of the star formed by this gas. The Sombrero Galaxy halo shows a turbulent past.
These younger and highly metallic stars are usually found on major galactic discs, where star populations are denser or more dense, according to conventional wisdom.
Even worse, there is a group of ball stars that are very old and low in metal. These older, low-metal stars are eventually expected to move out of their clusters and become part of the general halo, but this process seems ineffective in the sombrero galaxy.
The team compares the results with current computer simulations to determine where unexpected metallicity measurements in halo galaxies can originate.
The results also contradicted expectations and showed that an undisturbed sombrero had experienced a huge increase or merger billions of years ago.
Unlike our galaxy, the Milky Way, which is believed to have swallowed many small satellite galaxies into what are called “insignificant” clusters for billions of years, the main improvement is the meeting of two or more similar large galaxies that will become rich generations, the stars with higher metals. The Sombrero Galaxy halo shows a turbulent past.
Satellite galaxies only contain low metal stars, which are mostly composed of hydrogen and helium from the Big Bang. Heavier elements must be produced by nucleosynthesis in the star’s interior and incorporated into the next generation of stars.
This process is somewhat ineffective in dwarf galaxies such as those around our Milky Way and is more effective in larger and more developed galaxies.
The results for Sombrero are surprising because fine discs show no signs of disturbance. In comparison, many galaxies that interact, such as galaxies emblematic of antennas, get their name from the appearance of the helix arms distorted due to the tidal forces of their interactions. The Sombrero Galaxy halo shows a turbulent past.
The merging of large, similar galaxies usually merges into large, smooth, elliptical galaxies with long halos, a process that requires billions of years.
But sombrero never fits the traditional definition of spirals or elliptical galaxies. That’s somewhere between hybrids.
For this particular project, the team chose Sombrero mainly because of its unique morphology. They want to understand how “hybrid” galaxies can form and gather together over time. The next metal distribution study will be carried out with galaxies at distances similar to Sombrero. The Sombrero Galaxy halo shows a turbulent past.
The research team hopes for a future observatory to further investigate the unexpected nature of Sombrero.
The WFIRST infrared telescope, with a field of view 100 times larger than Hubble, can take continuous pictures of galactic halos because it captures more stars in infrared light.