Blue Stragglers

Blue Stragres scientists have recently discovered that the well-known strange stars as "blue rugged" might be the product of a collision between two or more old stars. This may lead to the mystery of finding a blue racquard with a history of 50 years. Even in "dense" areas, stars usually reach billions, even even several trillion miles. But stars sometimes collide with global clusters of dense clusters of up to 1 million stars. Approximately 15 billion years ago, all the stars in the cluster were called red giants and they were expanding to the outermost atmosphere.

The author suggests two possibilities to avoid this problem. The first one is HE 0437-5439 is a blue racquard. He sucks up a lot of materials from his companion, creates an illusion like a young star, and completely fuses with other stars to create a new song. , Big, star. Two similar stars, each with approximately 4 solar mass masses, can survive long enough to interact with the super large huge black hole before coalescing. They would have lived for 16.5 billion years.

After analyzing the observations, the team found that several clusters look young, blue scattering stars are distributed throughout the group, while larger stars look old and blue pedestrians gather in the center. The third group is in the process of aging, the star closest to the core moves first inwards, then the stars slowly sink towards the center. Barbara Lanzoni of the University of Bologna, a co-author of the study said, "Since these clusters are formed almost simultaneously, we have revealed that there is a big difference in the rate of evolution from clustering to clustering," It is. "In the case of rapidly growing clusters, the deposition process is expected to be completed in hundreds of millions of years, but the slowest cluster requires several times the current space age."

As clusters become older, heavier stars settle at the center of the cluster like sediments. High quality blue scatterers are strongly affected by this process. Due to its brightness, astronomers can observe them relatively easily. In order to better understand the aging of the clusters, the team, the Hubble Space Telescope, MPG / ESO 2.2 Metoru telescope of the European Southern Observatory, Canada - France - such as the image of Hawaii Telescope, the blue scattering stars in the 21 pieces of globular clusters I mapped the position. show. And the Subaru Telescope of the National Astronomical Observatory. Hubble provides a high resolution image of 20 compact centers, while the images taken by the ground telescope more clearly show its less busy external area.