The spiral galaxy LEDA 42975 was captured by the NASA/ESA Hubble Space Telescope. Astronomers found the galaxy in the constellation Virgo. Then LEDA 42975 is located about 48 million light years away.
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The formation of the LEDA Spiral Galaxy 42975
Citing sci-news, this galaxy is also known as IRAS 12425-0011 and UGC 7296. Then it experienced an episode of intense star formation.
Hubble astronomers explained that the star-forming explosion LEDA 42975 pushed the unusual shape. As a result of extreme galactic weather or better known as super winds. Another cause is the transfer of gas giants from the bright center of the galaxy to outer space.
These superwinds are the result of short-lived massive stellar winds. After that, it will form during the star explosion of the spiral galaxy LEDA 42975. Even other explosions such as energetic supernovae are spectacular.
Researchers also explain that two supernova explosions, such as the one seen at LEDA 42975, occurred in the last few decades. As has happened in 2014 and 2019.
LEDA 42975 is a stunning starburst galaxy. As we have seen, starburst galaxies are galaxies that undergo very high rates of star formation when compared to the long-term average of star formation in galaxies.
In other words, the rate of star formation observed in most other galaxies. In stellar explosion galaxies, the rate at which a star is formed is enormous. So the galaxy will exhaust all the gas reservoirs.
Then stars form on a time scale much shorter than the galaxy’s age. Most starburst galaxies are in the middle of encounters with other galaxies.
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Supernova Peak
At their peak, supernovae are often the brightest sources of light in their galaxies. The light is so bright that it can be seen clearly throughout the universe.
The 2014 supernova in the spiral galaxy LEDA 42975 in the Hubble image is still active. But the supernova has faded from its former glory after reaching its peak of more than 900 days. Then it looks like there is only one star in the busy galaxy.
Nonetheless, the supernova gas burst from the spiral galaxy LEDA 42975 is truly large-scale. The supernova stretches for tens of thousands of light years. But this is not visible in the Hubble images.
The superwind’s temperature is so high that the galaxy stands out as a glowing blob. This is in X-ray or radio observations. However, it does not appear at the visible wavelengths imaged by the NASA/ESA Hubble Space Telescope.
Star Explosion Determinants
The starburst spiral galaxy LEDA 42975 is determined by several interrelated factors. Among them is the comparison of star formation time scales. Then the consumption of available gas with the period of rotation of the galaxy.
Furthermore, the amount of gas available from stars can form into starburst galaxies. In addition, the speed of galaxies can turn gas into stars.
Star explosions are driven by merging and tidal interactions between gas-rich galaxies. The tidal tail will be visible in the galaxy at the center of the star explosion.
However, if there is no interaction between galaxies that do not coalesce, it can trigger an unstable rotation. For example, causing gas to be channeled to the nucleus. This triggers an explosion of star formation near the galaxy’s nucleus.
There is a strong correlation between galactic tilt and young star populations. Associated with more tilted galaxies have a younger population of central stars.
The cause of this tilt is tidal interactions and merging between galaxies. Thus, central star formation induces in galaxies and drives stellar explosions. As happened in the spiral galaxy LEDA 42975.
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Material Starburst
Starburst galaxies must have a large supply of gas to form stars. The trigger for the explosion itself was a close encounter with another galaxy.
Other processes such as material forcing its way into the center, for example, star rods. Then collisions between galaxies can also trigger explosions.
The environment is quite extreme to be part of the star explosion. Massive stars are formed from large amounts of gas.
Therefore, the star will burn very quickly and brightly. They may also explode at the end of their lives as supernovas. After that, it becomes a spiral galaxy like LEDA 42975. By studying the explosion of stars, it will help determine the history of their formation and evolution. (R10/HR-Online)
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