Alma telescope found a large number of stars near the carbon monoxide (video)-imjpmig

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ALMA telescope found a large number of carbon monoxide is unclear whether these stars save gas longer than they expected some stars nearby, or comet collision or ice eruption produced two large amounts of gas the largest radio telescope captures the first image shows 1300 galaxies 160719 space station space Tencent news news according to foreign media reported that astronomers using the Atta Khama large millimeter submillimeter array (ALMA) to examine dozens of young stars, they found that there are many stars in the large debris disk accidentally has a large amount of carbon monoxide, and those close to the sun star quality clastic disc does not contain any gas. This finding is contrary to what astronomers expect. They previously thought that massive stars would release more radiation than small stars, which would allow them to lose more of the gas in the detritus than smaller ones. This discovery also gives us a new understanding of the process of generating giant planets around young stars. The discs are formed around the star, and then evolve into a disk of dust and gas. Planets, asteroids, comets and other objects will be produced in the original disk. However, these newly formed objects have not yet entered a stable orbit around younger stars. They often collide with each other and produce a large amount of debris to form secondary debris disks. Related papers published in the Astrophysical Journal, the author of the article, Jesse Lieman-Sifry conducted these observations, he was an undergraduate student majoring in astronomy, Wesley College. Jesse has found that the previous spectroscopic measurements of detrital disks show that some of the detrital disks have unexpected chemical markers, suggesting that they have very rich carbon monoxide gas. But astronomers think these gases in our observed debris disk should disappear, so this discovery makes us very much puzzled. To find out why a particular star has a gas rich disk, Lieman-Sifry and his team examined the 24 star systems in the Scorpio Centaurus Association hundreds of light years away from earth. Astronomers have narrowed their search to 50 to 10 billion years of age. The stars of this age group already have mature planetary systems and debris disks. Scientists use ALMA to detect the millimeter wave of carbon monoxide in the stellar debris. The team selected 6 nights between December 2013 and December 2014, each about 10 minutes of observation. In all 24 samples, the researchers found that the 3 had strong carbon monoxide emissions. To their surprise, all of the three stars surrounded by rich gas discs have about two suns. And none of the 16 stars that are close to the sun have a debris disk with large amounts of carbon monoxide. This finding is counterintuitive, when massive stars release high energy ultraviolet rays to their planetary systems, which decompose carbon monoxide in their debris disks. However, this new study shows that larger stars are able to preserve or replenish their carbon monoxide inventories in some way. Meredith Hughes is co-author of the article,)相关的主题文章:

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