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  _____     ______  __    __     ___      _____   
 |__  //   /_   _// \ \\ / //   / _ \\   / ____|| 
   / //     -| ||-   \ \/ //   | / \ || / //---`' 
  / //__    _| ||_    \  //    | \_/ || \ \\___   
 /_____||  /_____//    \//      \___//   \_____|| 
 `-----`   `-----`      `       `---`     `----`

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發送短信 : Kerr black hole surrounded by dark matter: Horizon, photonosphere and shadow