The National Institute of Natural Science of Japan (NINS) announced on August 3 the discovery of a galaxy with very low oxygen concentrations in the constellation Vu Tien.
AI Discovers galaxies 430 million light years away New galaxy is discovered in wide field image data. Video: Subaru Telescope NAOJ.
The discovery is made by combining big data from Hawaii-based Subaru telescopes and machine learning – a field of artificial intelligence that enables systems to automatically learn and improve. performance over time.
The new galaxy, named HSC J1631 + 4426, lies about 430 million light years from Earth. With an oxygen abundance of only 1.6% that of the Sun, HSC J1631 + 4426 has broken the record for the galaxy with the lowest oxygen concentration ever reported. The low levels of oxygen abundance suggest that most of the stars in this galaxy have formed very recently, in other words, are undergoing an early stage of evolution.
“HSC J1631 + 4426’s stellar mass is also very small, only 0.00001 times the Milky Way. This further reinforces the immaturity of the galaxy,” said Professor Ouchi at the National Astronomical Observatory and Dai learned Tokyo, Japan said.
Most galaxies in the present universe are “mature” galaxies. The new discovery is therefore of great importance in studying the evolution of the universe.
Since galaxies in their early stages of formation are particularly rare, the team led by Dr. Takashi Kojima from NINS used wide-field imaging data – including 40 million objects – captured by the Subaru telescope. . They developed a search method based on machine learning that would allow computers to automatically scan huge databases and spot “nascent” galaxies based on color.
Details of the research have been published in the Astrophysical Journal of astrophysics.
(According to Science Daily)