Astronomy Picture of the Day

   [1]Discover the cosmos! Each day a different image or photograph of our
      fascinating universe is featured, along with a brief explanation
                    written by a professional astronomer.

                                2021 June 22
   [2]The picture shows the the star forming system HD 163296 as captured
       by ALMA and VLT, including a disk and two jets. Please see the
                 explanation for more detailed information.

                   HD 163296: Jet from a Star in Formation
       Image Credit: Visible: [3]VLT/[4]MUSE ([5]ESO); Radio: [6]ALMA
                          ([7]ESO/[8]NAOJ/[9]NRAO)

   Explanation: How are jets created during star formation? [10]No one is
   sure, although recent images of the young star system HD 163296 are
   quite illuminating. The central star in the [11]featured image is still
   forming but seen already surrounded by a [12]rotating disk and an
   [13]outward moving jet. The disk is shown in [14]radio waves taken by
   the [15]Atacama Large Millimeter Array ([16]ALMA) in [17]Chile, and
   show gaps likely created by the gravity of [18]very-young planets. The
   jet, shown in [19]visible light taken by the [20]Very Large Telescope
   ([21]VLT, also in Chile), expels fast-moving gas -- mostly [22]hydrogen
   -- from the disk center. The system spans hundreds of times the
   Earth-Sun distance ([23]au). Details of these new observations are
   [24]being interpreted to bolster conjectures that the [25]jets are
   generated and shaped, at least in part, by [26]magnetic fields in the
   rotating disk. Future observations of [27]HD 163296 and other similar
   star-forming systems may help fill in details.

     Astrophysicists: [28]Browse 2,500+ codes in the Astrophysics Source
                                Code Library
                Tomorrow's picture: star formation: the movie
     __________________________________________________________________

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    Authors & editors: [40]Robert Nemiroff ([41]MTU) & [42]Jerry Bonnell
                                 ([43]UMCP)
          NASA Official: Phillip Newman [44]Specific rights apply.
              [45]NASA Web Privacy Policy and Important Notices
                A service of: [46]ASD at [47]NASA / [48]GSFC
                           & [49]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2106/HD163296_AlmaVlt_1187.jpg
   3. https://www.eso.org/public/usa/teles-instr/paranal-observatory/vlt/
   4. https://www.eso.org/sci/facilities/develop/instruments/muse.html
   5. https://www.eso.org/public/
   6. https://www.almaobservatory.org/en/home/
   7. https://www.eso.org/
   8. https://www.nao.ac.jp/en/
   9. https://public.nrao.edu/
  10. https://i.pinimg.com/564x/30/62/75/3062756a297f1e3c22e35f3fe89b3ecc.jpg
  11. https://arxiv.org/abs/2011.08043
  12. https://apod.nasa.gov/apod/ap050312.html
  13. https://apod.nasa.gov/apod/ap200831.html
  14. https://science.nasa.gov/ems/05_radiowaves
  15. https://en.wikipedia.org/wiki/Atacama_Large_Millimeter_Array
  16. https://apod.nasa.gov/apod/ap140526.html
  17. https://en.wikipedia.org/wiki/Chile
  18. http://www.sci-news.com/astronomy/alma-three-giant-protoplanets-hd-163296-06097.html
  19. https://science.nasa.gov/ems/09_visiblelight
  20. https://www.eso.org/public/usa/teles-instr/paranal-observatory/vlt/
  21. https://youtu.be/gdBP3sIKL4E
  22. https://en.wikipedia.org/wiki/Hydrogen
  23. https://cneos.jpl.nasa.gov/glossary/au.html
  24. https://arxiv.org/abs/2106.01661
  25. https://arxiv.org/abs/astro-ph/0306519
  26. https://en.wikipedia.org/wiki/Magnetic_field
  27. https://www.circumstellardisks.org/show.php?id=61
  28. http://ascl.net/
  29. https://apod.nasa.gov/apod/ap210621.html
  30. https://apod.nasa.gov/apod/archivepix.html
  31. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  32. https://apod.nasa.gov/apod/lib/aptree.html
  33. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  34. https://apod.nasa.gov/apod/calendar/allyears.html
  35. https://apod.nasa.gov/apod.rss
  36. https://apod.nasa.gov/apod/lib/edlinks.html
  37. https://apod.nasa.gov/apod/lib/about_apod.html
  38. http://asterisk.apod.com/discuss_apod.php?date=210622
  39. https://apod.nasa.gov/apod/ap210623.html
  40. http://www.phy.mtu.edu/faculty/Nemiroff.html
  41. http://www.phy.mtu.edu/
  42. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  43. http://www.astro.umd.edu/
  44. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  45. https://www.nasa.gov/about/highlights/HP_Privacy.html
  46. https://astrophysics.gsfc.nasa.gov/
  47. https://www.nasa.gov/
  48. https://www.nasa.gov/centers/goddard/
  49. http://www.mtu.edu/