WORLDTECHSpace & Science
Chandra Traces Repeated Outbursts of Star AT 2016blu to Hidden Companion
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File:Cygnus X-1- NASA's Chandra Adds to Black Hole Birth Announcement (2011-cygx1 - cygx1 lg).jpg / Optical: DSS; Illustration: NASA/CXC/M.Weiss / Cygnus X-1: NASA's Chandra Adds to Black Hole Birth Announcement / Wikimedia Commons / Public Domain / https://commons.wikimedia.org/wiki/File:Cygnus_X-1-_NASA%27s_Chandra_Adds_to_Black_Hole_Birth_Announcement_(2011-cygx1_-_cygx1_lg).jpgSource pageUsing NASA’s Chandra X-ray Observatory, astronomers have discovered what is triggering repeated outbursts from a giant, unstable star. It is also the first of these objects found with a black hole or neutron star companion. A composite NASA Chandra X-ray and Sloan Digital Sky Survey (SDSS) optical image of the galaxy NGC 4559 located about 30 million light-years from Earth. The Chandra data shows X-ray point sources represented in purple, and the SDSS data shows the galaxy and foreground and background objects in red and blue. The luminous blue variable and supernova impostor AT 2016blu is in the middle of the small square.
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