1 - 4 / 4

• 

  Resurrected Supernova Provides Missing-Link in Stellar Evolution

  アニメーション Movie Artist's Rendering

  An international research team has discovered the first example of a supernova, known as SN 2018ivc, showing an unprecedented rebrightening at millimeter wavelengths about one year after the explosion.
  With the help of the Atacama Large Millimeter/submillimeter Array -- or ALMA -- the analysis revealed that the dying massive star ejected a large amount of its envelope due to a strong binary interaction with a companion star that took place about 1500 years before the explosion.
  In a paper published in The Astrophysical Journal Letters, the team posits that this rebrightening event in SN 2018ivc provides a missing link between supernovae -- or SN -- that occur in binary star systems and those that involve solitary massive stars. Resurrected Supernova Provides Missing-Link in Stellar Evolution
  Credit: ALMA (ESO/NAOJ/NRAO)
  Animation: S.Iwashita (NAOJ)
• 

  Computer graphics movie of the star formation history in the galaxy MACS1149-JD1

  Artist's Rendering

  The self-gravity of matter creates filamentary structures and the density at the intersections of the filaments increases. Around 200 million years after the Big Bang, active star formation ignites in the high density regions, which leads to the formation of galaxies. The gas in the galaxy is blown off by active stellar wind and supernovae, then the gas returns to the galaxy and causes another burst of star formation.
  
  For details: See the press release "ALMA Finds Oxygen 13.28 Billion Light-Years Away - Most Distant Oxygen Indicates Mature Nature of a Young Galaxy".
  
  Credit: ALMA (ESO/NAOJ/NRAO)
• 

  Artist’s impression video of a baby star TMC-1A

  Artist's Rendering

  Researchers using the Atacama Large Millimeter/submillimeter Array (ALMA) have made the first direct observations delineating the gas disk around a baby star from the infalling gas envelope. This finding fills an important missing piece in our understanding of the early phases of stellar evolution.
  This video is an artist’s impression of the baby star TMC-1A. The star is located in the center and surrounded by a rotating gas disk. Gas is infalling to the disk from the envelope further out.
  
  Credit: NAOJ
  
  Press release is available at ALMA Spots Baby Star's Growing Blanket
• 

  ALMA Precisely Measures Black Hole Mass

  Artist's Rendering

  A research group led by Kyoko Onishi at the SOKENDAI (The Graduate University for Advanced Studies) observed the barred spiral galaxy NGC 1097 with ALMA and found that the central supermassive black hole (SMBH) has a mass 140 million times the mass of the Sun.
  This is video of new ALMA result on weighing supermassive black hole in the barred spiral galaxy NGC 1097.
  
  Credit: J. Hellerman, B. Kent (NRAO/AUI/NSF); ALMA (NRAO/ESO/NAOJ); K. Onishi (SOKENDAI); NASA/ESA Hubble Space Telescope
  Produced by U. S. National Radio Astronomy Observatory
  
  Press release is available at ALMA Precisely Measures Black Hole Mass