蜜臀av性久久久久|国产免费久久精品99|国产99久久久久久免费|成人精品一区二区三区在线|日韩精品一区二区av在线|国产亚洲欧美在线观看四区|色噜噜综合亚洲av中文无码|99久久久国产精品免费播放器

<cite id="ygcks"><center id="ygcks"></center></cite>
  • 
    
  • <rt id="ygcks"></rt>
    <cite id="ygcks"></cite>
  • <li id="ygcks"><source id="ygcks"></source></li> <button id="ygcks"></button>
  • <button id="ygcks"></button>
    <button id="ygcks"><input id="ygcks"></input></button>
    
    
    <abbr id="ygcks"><source id="ygcks"></source></abbr>
    
    

    Astronomers find rare star system may produce gamma-ray burst: Aussie research

    Source: Xinhua| 2018-11-20 11:40:51|Editor: Li Xia
    Video PlayerClose

    SYDNEY, Nov. 20 (Xinhua) -- Astronomers from the University of Sydney have identified a "nearby" star system as having the potential to produce a gamma-ray burst, one of the most energetic events in the universe, second only to the big bang.

    According to a research published on Tuesday, Aussie scientists along with international colleagues revealed that they have located the rare system just 8,000 light years from earth, the first of its type to be found in our galaxy.

    "We knew immediately that we have found something quite exceptional, the luminosity across the spectrum from the radio to the infrared was off the charts," lead author Dr. Joe Callingham from the Netherlands Institute for Radio Astronomy said.

    The system was nicknamed Apep. Two of Apep's stars are of the Wolf-Rayet variety meaning they are massive and reaching the end of their life.

    Those stars could explode into supernovae at any time, and could result in a cataclysmic gamma-ray event combining with the system's extreme conditions.

    "The rapid rotation puts Apep into a whole new class," study co-author Dr. Benjamin Pope from New York University said.

    "Normal supernovae are already extreme events but adding rotation to the mix can really throw gasoline on the fire," Benjamin said.

    Scientists said that a gamma-ray burst from one of Apep's stars would have the capacity to strip the earth of its Ozone layer, while it appears not to be aimed at us at the moment.

    "Ultimately, we can't be certain what the future has in store for Apep," research group leader Professor Tuthillat from University of Sydney said.

    "The system might slow down enough so it explodes as a normal supernova rather than a gamma-ray burst. However, in the meantime, it is providing astronomers a ringside seat into beautiful and dangerous physics that we have not seen before in our galaxy," the group leader said.

    TOP STORIES
    EDITOR’S CHOICE
    MOST VIEWED
    EXPLORE XINHUANET
    010020070750000000000000011100001376192741
    开封市| 咸丰县| 赫章县| 花莲市| 鱼台县| 五台县| 平昌县| 冀州市| 玉溪市| 龙井市| 电白县| 郯城县| 吉木萨尔县| 北宁市| 云霄县| 长乐市| 威信县| 元谋县| 高雄县| 朝阳区| 美姑县| 无锡市| 马关县| 新平| 邹平县| 多伦县| 西平县| 遂宁市| 安乡县| 宜兰市| 平阳县| 荔波县| 丰都县| 荥经县| 定陶县| 阿拉善右旗| 海口市| 泸州市| 黄冈市| 肃南| 常宁市|