Last year, scientific circles were filled with reports of a galaxy that claimed it had no dark matter. Current theories maintain that dark matter is fundamental for the collapse of gas to form stars in galaxies. A new article published by researchers from the Institute of Astrophysics of the Canary Islands (IAC) claims to have solved the mystery.
IAC scientists claim that after conducting a full set of observations of KKS2000]04 (NGC1052-DF2), formerly called "the galaxy without dark matter", have solved the mystery. The team says that the parameters that depend on the distance of the galaxy were anomalous, the team has reviewed the distance indicators.
The team used five different distance indicators taken with five independent methods to estimate the distance of the galaxy. The team found that they all agreed with one conclusion: the galaxy is much closer to the value presented in previous research. The team says that the original article on the galaxy uses a distance of 64 million light years from Earth.
According to the IAC team, the galaxy is actually much closer, around 42 million light years. When the calculations were re-run using the new distance, the galaxy is now considered normal and conforms to the observed trends of galaxies with similar characteristics.
The team says the new data has found that the total mass of this galaxy is about half the mass estimated previously. The mass of the star is only about a quarter of the mass previously estimated. The new findings imply that a significant part of the total mass of the galaxy must be made of dark matter. The team says the new work shows the importance of correctly measuring extragalactic distances.