Highlights

First Stars Heavy But Not Monstrous -Researchers recreate Universe's first star-
2011. 12. 2

An international research group including Kyoto University researchers reported the result of a new computer simulation to show that the first stars in the universe were not monstrous scientists had believed.The team led by Takashi Hosokawa, a JSPS fellow at Kyoto University and NASA Jet Propulsion Laboratory, together with Kazuyuki Omukai at Kyoto University, Naoki Yoshida at University of Tokyo and Harold Yorke at NASA, performed a large-scale computer simulation of the formation and evolution of one of the first stars in the universe. The mind-boggling simulation took several weeks. At the end of the calculation, Hosokawa and his colleagues found the full grown star weighed about 40 times that of the Sun. They also discovered how such a primordial star regulated its own growth not to be extremely heavy. The research article has been selected as one of the highest impact papers by the Science magazine and will be published as Science Express on November 11th 2011.

[Figure Caption: A 3-D view of the star and the surrounding gas. A closer look reveals the complex structure of the gas. There is a central growing star at the center, zoomed-in in the right panel, acquiring a cold gas through a disk that appears as a thick blue ring. The disk is composed of mostly molecular hydrogen. Hot gas bubbles, appearing in red, are expanding in the vertical direction to the disk.]