Explosions in the sky

2a1046385e6cf8e4d07d590f9821ece5?s=47 federica
July 18, 2019

Explosions in the sky

outreach talk about why explosions in the sky rule! #supernova #astrophysics

2a1046385e6cf8e4d07d590f9821ece5?s=128

federica

July 18, 2019
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  1. @fedhere Federica B. Bianco University of Delaware LSST Science Collaborations

    Explosions in the sky
  2. @fedhere

  3. @fedhere 1572 SN Tycho in Scania, Denmark, Tycho Brahe first

    observed a "new star" on November 11, 1572. From Flammarion's Astronomie Populaire (1880)
  4. @fedhere 1572 SN Tycho in Scania, Denmark, Tycho Brahe first

    observed a "new star" on November 11, 1572. From Flammarion's Astronomie Populaire (1880)
  5. @fedhere (possibly) supernova of A.D. 1006 and the constellation Scorpius

    White Tanks Regional Park, Phoenix, AZ. SN1006
  6. @fedhere (possibly) supernova of A.D. 1006 and the constellation Scorpius

    White Tanks Regional Park, Phoenix, AZ. SN1006
  7. @fedhere In the 2nd year of the epoch Zhongping, the

    10th month, on the day Kwei Hae [December 7, Year 185], a 'guest star' appeared in the middle of Nan Mun [Alpha Centauri], The size was half a bamboo mat. It displayed various colors, and gradually lessened. In the 6th month of the succeeding year it disappeared. [4] 《後漢漢書·卷⼗十⼆二·天⽂文下》:"中平⼆二年年⼗十⽉月癸亥,客星出南⾨門中,⼤大如半 筵,五⾊色喜怒怒稍⼩小,⾄至後年年六⽉月消。占⽈曰:‘為兵。’⾄至六年年,司隸校尉袁 紹 誅滅中官,⼤大將軍 部曲將 吳匡 攻殺 ⾞車車騎將軍 何苗,死者數數千⼈人。" SN 185
  8. @fedhere SN 185 In the 2nd year of the epoch

    Zhongping, the 10th month, on the day Kwei Hae [December 7, Year 185], a 'guest star' appeared in the middle of Nan Mun [Alpha Centauri], The size was half a bamboo mat. It displayed various colors, and gradually lessened. In the 6th month of the succeeding year it disappeared. [4]
  9. @fedhere 10 stars explode every second A. Connolly, TED talk

  10. @fedhere 1 Stars have lives! They are born, they grow

    old, and they die
  11. @fedhere

  12. @fedhere gravity is pushing the star inward

  13. @fedhere gravity is pushing the star inward Nuclear reactions push

    the star outward
  14. @fedhere gravity is pushing the star inward Nuclear reactions push

    the star outward H->He->C->N->O->…Fe Hydrostatic equilibrium
  15. @fedhere gravity is pushing the star inward Nuclear reactions push

    the star outward H->He->C->N->O->…Fe Hydrostatic equilibrium
  16. @fedhere gravity is pushing the star inward Nuclear reactions push

    the star outward
  17. @fedhere 2 Just like stars in Hollywood : the biggest

    stars live fast and die young and spectacularly
  18. @fedhere high initial mass low initial mass low mass….. boring

    death by cooling down
  19. @fedhere high initial mass High mass….. Explosive death!

  20. @fedhere high initial mass low initial mass but in a

    multiple system Low mass binaries….. Explosive death!
  21. @fedhere high initial mass low initial mass but in a

    multiple system Low mass binaries….. Explosive death!
  22. @fedhere Reasons to study Supernovae umbnails/image/g299.jpg

  23. @fedhere Reason I to study Supernovae umbnails/image/g299.jpg natures fireworks that

    leave awesome remnants!
  24. @fedhere “The nitrogen in our DNA, the calcium in our

    teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.” ― Carl Sagan, Cosmos Reason II to study Supernovae we are made of star dust
  25. @fedhere they are different and mostly we don’t know why

    Reason III to study Supernovae
  26. @fedhere SN 2011dh, M51 vanDyk et al. 2011

  27. @fedhere “the SN progenitor problem”

  28. @fedhere Wavelength SN observables time https://www.youtube.com/watch?v=alAQqzlB-O8

  29. @fedhere We can see them really far away, and they

    are are really good at telling us about how the Universe works Reason IV to study Supernovae
  30. @fedhere 3 The Universe is expanding

  31. @fedhere everything is getting farther away from everything

  32. @fedhere Doppler effect

  33. @fedhere If we know the frequency, then we can measure

    how fast its moving Doppler effect low light frequency (red) High light frequency (blue) Redshift
  34. @fedhere If we know how bright, then we can measure

    how far
  35. @fedhere time luminosity A special type of Supernova: SN Ia

    S. Perlmutter, A.Reis, B. Schmidt
  36. @fedhere time luminosity Rest+ 2014 A special type of Supernova:

    SN Ia Luminosity <-> DISTANCE Redshift <-> VELOCITY
  37. @fedhere The Universe is expanding

  38. @fedhere 4 The Universe is expanding Faster and Faster!

  39. @fedhere Stellar explosions rule!!