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Dark matter idea art.
A global group of astronomers led by researchers from the Netherlands has actually discovered no trace of dark matter in the galaxy AGC 114905, despite taking in-depth measurements over a course of forty hours with state-of-the-art telescopes. They will present their findings in Monthly Notices of the Royal Astronomical Society.
When Pavel Mancera Piña (University of Groningen and ASTRON, the Netherlands) and his coworkers found 6 galaxies with little to no dark matter, they were told “procedure again, youll see that there will be dark matter around your galaxy.” After forty hours of detailed observations utilizing the Very Large Array (VLA) in New Mexico (United States), the evidence for a dark matter-free galaxy only became stronger.
The galaxy in question, AGC 114905, has to do with 250 million light-years away. It is classified as an ultra-diffuse dwarf galaxy, with the name dwarf galaxy describing its luminosity and not to its size. The galaxy has to do with the size of our own Milky Way however includes a thousand times less stars. The prevailing idea is that all galaxies, and definitely ultra-diffuse dwarf galaxies, can just exist if they are held together by dark matter.
The galaxy AGC 114905. The galaxy does not appear to consist of any dark matter, even after 40 hours of detailed measurements with state-of-the-art telescopes.
Subsequently, they made a graph revealing the range of the gas from the center of the galaxy on the rotation and the x-axis speed of the gas on the y-axis. The chart reveals that the movements of the gas in AGC 114905 can be entirely described by just regular matter.
” This is, of course, what we believed and hoped for since it verifies our previous measurements,” states Pavel Mancera Piña. “But now the problem remains that the theory anticipates that there must be dark matter in AGC 114905, but our observations say there isnt. The difference in between theory and observation is just getting larger.”.
AGC 114905 might have been stripped of dark matter by large neighboring galaxies. With customized Newtonian dynamics, an alternative theory to cold dark matter, we can not reproduce the movements of the gas within the galaxy.”.
According to the scientists, there is one more assumption that could change their conclusions. That is the approximated angle at which they believe they are observing the galaxy. “But that angle needs to deviate quite from our price quote before there is space for dark matter once again,” says co-author Tom Oosterloo (ASTRON).
On the other hand, the scientists are examining a second ultra-diffuse dwarf galaxy in detail. It will make the case for dark matter bad galaxies even stronger if again observe no trace of dark matter in that galaxy.
The research study of Mancera Piña and coworkers is not an isolated case. Earlier, for example, the Dutch American Pieter van Dokkum (Yale University, USA) found a galaxy with hardly any dark matter. The techniques and measurements of Mancera Piña and associates are more robust.
Recommendation: “No need for dark matter: fixed kinematics of the ultra-diffuse galaxy AGC 114905″ by Pavel E. Mancera Piña, Filippo Fraternali, Tom Oosterloo, Elizabeth A. K. Adams, Kyle A. Oman and Lukas Leisman, pending, Monthly Notices of the Royal Astronomical Society.arXiv:2112.00017.
It is classified as an ultra-diffuse dwarf galaxy, with the name dwarf galaxy referring to its luminosity and not to its size. The prevailing idea is that all galaxies, and definitely ultra-diffuse dwarf galaxies, can only exist if they are held together by dark matter.
The galaxy does not appear to include any dark matter, even after 40 hours of detailed measurements with state-of-the-art telescopes. AGC 114905 might have been stripped of dark matter by large nearby galaxies. With modified Newtonian characteristics, an alternative theory to cold dark matter, we can not recreate the motions of the gas within the galaxy.”.
