The mosaic of spinning dusty disks shows a sample of images taken by the Gemini International Laboratory of INS’s NOIRLab project, part of an unprecedented study of 44 large young stars. An international team explored planet formation using Gemini South in Chile and discovered the Jupiter-mass young planet, confirming the existence of two brown dwarfs. The images will be featured in today’s sessions at the 240th meeting of the American Astronomical Society.

This spectacular image, taken by astronomers using the Gemini South telescope in Chile, is part of a larger study of 44 young massive stars using the Gemini Planet Imager (GPI) instrument, which captured the disks that make up their dusty planet. New solar families – in infrared light. The survey found that disks orbiting stars three times the mass of the Sun have rings, while disks around stars larger than three solar masses do not. This suggests that more massive stars may form slightly different planets.

Planets form disks of gas and dust that orbit young stars millions of years old, and GPI is one of the few tools in the world that can solve these disks. Previous observations have indicated that large and small grains of dust and rings of gas are often found in these disks. The formation of these rings is uncertain, but they are said to be due to the interaction of nascent planets with the disk.

Astronomers conducting a survey called Gemini-LIGHTS (Gemini-Large Imaging with GPI Herbig/T-Tauri Survey) sought to answer some of these questions by creating high-resolution images of disks orbiting a model of 44 stars. .

“We want to answer the fundamental question of how planets form,” said Evan Rich, a graduate professor at the University of Michigan and lead author of a new study describing the findings. astronomy journal. In particular, the Gemini-Lights Survey “focuses on stars larger than the Sun, exploring the possible influence of massive planet formation from a parent star”.

Gemini captured images of the southern disks in near-infrared and polarized light. It detected 80% of the discs of the 44 target stars and discovered a new candidate planet (around V1295 Aquilae) and three brown dwarfs. Two of the brown dwarfs (around stars (V921 Sco and HD 158643)) had already been identified as candidates by previous observations, which are now confirmed by these observations; The third brown dwarf surrounding star HD 101412 is a new candidate.

However, the main finding of the investigation is that the disks behave differently depending on the mass of the orbiting star. “Systems with small rings of dust grains are only found around stars three times lighter than the Sun,” Rich said. “This is important because planet formation is thought to form a ring system, and our findings suggest that the process of planet formation may be different for stars three times larger than the Sun.”

This information will be presented in a press conference and oral presentation at the 240th meeting of the American Astronomical Society today.

Source of the story:

Planned ingredients Association of Universities for Astronomical Research (AURA). Note: Content style and length are subject to change.

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