Galaxy NGC 1052-DF2, as shown in NASA file photo. | Photo Credit: NASA
Astronomers at the Indian Astrophysical Institute (IIA) found the reason for the strange lack of dark matter in the distant galaxy NGC 1052-DF2. Dark matter is a critical part of the galaxy formation.
According to the Ministry of Science and Technology, earlier models have shown that the ultra-diffuse galaxy (UDG) NGC 1052-DF2 is in the dark matter, which contradicts the standard models of galaxies and evolution.
He said that previous NGC 1052-DF2 studies predict the overall “dynamic weight” in the galaxy spatial range to be less than 340 million solar materials, comparable to the estimated weight of stars of 200 million solar materials.
“This surprising result means that in the observed range of the galaxy, matter is mostly composed of the stars with which we are familiar with, and that dark matter is significantly less than expected compared to spiral galaxies such as Milky Way.
“We have found that the NGC 1052-DF2 asks interesting questions about the creation of galaxies with a minimum content of dark matter, astrophysical processes regulate the formation of such galaxies and the potential nature of the dark matter itself,” said Astronomer K. Aditya, whose research was published in Astronomy & Astrophysics.
In order to throw the light on this problem and solve the irregularities with the weight estimate of the NGC 1052-DF2, Mr. Aditya created models using stellar density as an input parameter and limited the parameters corresponding to the halo of dark matter. He then used the observed stars speed dispersion profile to limit the model.
“We have found that weight models with“ CUSPY ”(higher density in central areas) Halo are comparable to dark mass models. In addition, these Cush Dark Matter Halo cannot consistently respond for the observed speed dispersion in the inner and external areas of the galaxy. Aditya.
Published – April 23 2025 20:55
