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Abrams Planetarium Night Sky Chat: Neutron Stars and Pulsars!

D57a02ba9a9ecb65d11370e3abf4dddc?s=47 Abbie Stevens
September 30, 2020
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Abrams Planetarium Night Sky Chat: Neutron Stars and Pulsars!

This talk was given as part of the Abrams Planetarium Night Sky Chats on September 30th, 2020. Note that gifs and videos won't render in this pdf.

Watch a video of the talk and accompanying pulsar craft here! https://www.facebook.com/AbramsPlanetarium/videos/427375928234639

More about neutron stars and pulsars: https://abigailstevens.com/outreach/neutron-stars-and-pulsars/

D57a02ba9a9ecb65d11370e3abf4dddc?s=128

Abbie Stevens

September 30, 2020
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Transcript

  1. Neutron stars and Pulsars! Dr. Abbie Stevens Abrams Planetarium Night

    sky chat
  2. Image: R.N. Bailey, CC BY 4.0, WikiMedia 2 2 Life

    cycle of a star
  3. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova Watts+16 Image credit: ESA / HST / L. Calcada / NASA GSFC
  4. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! Watts+16 Image credit: Google maps
  5. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! • Their average density is equal to the density of an atomic nucleus! Watts+16 Image credit: Watts+16
  6. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! • Their average density is equal to the density of an atomic nucleus! Watts+16 Image credit: Watts+16
  7. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! • Their average density is equal to the density of an atomic nucleus! • VERY strong gravity: acceleration at surface is 100,000,000,000x stronger than on Earth Watts+16 Image credit: JBO/John Rowe Animation
  8. Neutron star Photo credit: F.E.Austin • Leftover when a massive

    star (10-20x as big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! • Their average density is equal to the density of an atomic nucleus! • VERY strong gravity: acceleration at surface is 100,000,000,000x stronger than on Earth • Has a magnetic field 1 billion – 1 quadrillion times stronger than Earth’s
  9. Neutron star • Leftover when a massive star (10-20x as

    big as our Sun) dies in a supernova • About 15 miles across, with 1.5x the mass of the Sun! • Their average density is equal to the density of an atomic nucleus! • VERY strong gravity: acceleration at surface is 100,000,000,000x stronger than on Earth • Has a magnetic field 1 billion – 1 quadrillion times stronger than Earth’s • Spin on their axis up to 100’s of times per second! Watts+16 Image credit: Warner Bros.
  10. Image credit: NASA/CXC/K. Divona

  11. PULSAR • A neutron star with a very strong magnetic

    field Watts+16 Image credit: Mysid/R. Smits Magnetic field lines (invisible!)
  12. PULSAR • A neutron star with a very strong magnetic

    field • Shines bright beams of light out of its north and south magnetic poles Watts+16 Video credit: NASA
  13. Fancy PULSAR Some types of pulsars might have a twisted

    magnetic field structure, so they might have multiple poles in different shapes and locations! Watts+16 Video credit: NASA
  14. PULSAR • A neutron star with a very strong magnetic

    field • Shines bright beams of light out of its north and south magnetic poles • Beams of light + spinning = pulses (like a lighthouse) Watts+16 Kramer gif Image credit: M. Kramer; H.Craft/P.Saville
  15. Studying pulsars in space Image credit: NASA NICER: Neutron star

    Interior Composition ExploreR
  16. Studying pulsars in space Video credit: NASA

  17. Supernova remnants • Gas from outer layers of exploding star

    heating up as it hits ambient space dust Watts+16 Image credit: NASA/CXC/SAO
  18. Supernova remnants • Gas from outer layers of exploding star

    heating up as it hits ambient space dust Watts+16 Image credit: NASA/CXC/RIKEN & GSFC/T. Sato+ & DSS Image credit: NASA/CXC/SAO
  19. Supernova remnants • Gas from outer layers of exploding star

    heating up as it hits ambient space dust Watts+16 Image credit: NASA/ESA/HST
  20. Pulsar wind nebulae • Energetic particles from the pulsar collide

    with the ambient space dust Image credit: NASA/CXC/SAO/F.Seward & ESA/ASU/J.Hester & A.Loll; & JPL-Caltech/UMinn./R.Gehrz
  21. Pulsar wind nebulae • Energetic particles from the pulsar collide

    with the ambient space dust Image credit: NASA/ESA/STScI/F.Summers+; CXC/SAO/N.Wolk+ & Caltech/IPAC/R.Hurt
  22. Pulsar wind nebulae • Energetic particles from the pulsar collide

    with the ambient space dust Image credit: NASA/JPL-Caltech/McGill
  23. • PBS Crash Course Astronomy on neutron stars • Chandra

    X-ray Observatory • NASA Goddard Space Flight Center Media Studios Further learning resources
  24. None
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