Space Telescope Sciences Scientists According to a team of astronomers led by science scientists at the Sciences, highly ionized neon gas detected in the center of the Spiral Galaxy Messier 83 by a mid-inphrase instrument (MIRI) mounted on the NASA/CSA James Webb Space Telescope.
This web image shows the Messier 83. Image credits: NASA/ESA/CSA/Webb/A. Adamo, Stockholm University/Feast JWST Team.
Messier 83 is a spiral galaxy, a magnificently designed rod 15 million light years away from the southern constellations of Hydra.
Also known as the Southern Pinwheel Galaxy, M83, NGC 5236, Leda 48082, and UGCA 366, the galaxy is about twice as small as the Milky Way.
Messier 83 was like that I discovered it By French astronomer Nicholas Louis des Lacaille on February 17, 1752.
Its apparent size is 7.5, and is one of the brightest spiral galaxies in the night sky. It is the easiest way to observe using binoculars in May.
This is a prominent member of the galaxy group known as the Centaurus A/M83 group, counting the Dusty NGC 5128 (Centaurus A) and the irregular Galaxy NGC 5253.
Messier 83 has been a mystery for a long time. Large spiral galaxies often host active galactic nuclei (AGN), but astronomers have struggled to see what Messier 83 has been the case for decades.
Previous observations suggested that if a super-large black hole exists there, it must be dormant or hidden behind thick dust. However, new Webb observations reveal signs that suggest that this is not the case.
“The discovery of highly ionized neon emissions in the nucleus of the M83 was unexpected,” said Dr. Svea Hernandez, an astronomer with an ESA aura at the Institute of Space Telescope Science.
“These signatures require a lot of energy to be produced, rather than what a normal star can produce.”
“This strongly suggests the existence of a previously elusive AGN.”
“Before Webb we didn’t have the tools to detect such faintly ionized gas signatures at the nucleus of the M83.”
“Now, with incredible mid-red sensitivity, we can finally explore these hidden depths of the galaxy and uncover what we once couldn’t be seen.”
Webb’s mid-infrared observation allowed astronomers to peer into the dust and detect signs of highly ionized gases in small masses near the galactic nucleus.
The energy required to create these signatures is significantly higher than what supernovae and other great processes can offer, making AGN the most likely explanation.
However, alternative scenarios such as extreme shock waves in interstellar media are still under investigation.
“Webb is revolutionizing understanding of galaxies,” says Dr. Linda Smith, an astronomer at The Space Telescope Science Institute.
“For years, astronomers have been searching for the M83 black hole without success. Now we have compelling clues that could finally exist.”
“This finding shows how Webb is making unexpected breakthroughs.”
“Astronomers thought they had ruled out AGN on the M83, but now there is fresh evidence that they will challenge past assumptions and open new paths for exploration.”
Survey results It will be displayed in Astrophysical Journal.
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Svea Hernandez et al. 2025. JWST/MIRI detection [Ne v] and [Ne vi] M83: Evidence of a long-required active galactic nucleus? APJ 983, 154; doi:10.3847/1538-4357/adba5d
Source: www.sci.news
