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Humanity's quest to put eyes and ears on gravitational waves

jjhermes
October 21, 2017

Humanity's quest to put eyes and ears on gravitational waves

Outreach talk, 50 min. Oct. 2017: Staunton River Star Party, Scottsburg, VA, USA.

jjhermes

October 21, 2017
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  1. Humanity's Quest To
    Put Eyes And Ears On
    Gravitational Waves
    Dr. JJ Hermes
    Hubble Fellow
    University of North Carolina at Chapel Hill
    www.jjherm.es

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  2. V = 13.3 mag
    Electromagnetic Radiation
    a.k.a. Visible Light

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  3. V = 13.3 mag
    Wiggling a
    Charge
    Gives Off
    Radiation!

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  4. V = 13.3 mag
    Hotter Things Give Off Bluer Light!

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  5. V = 13.3 mag
    Einstein: Mass Bends Space
    (General Relativity)

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  6. V = 13.3 mag
    Close Pairs of
    Stars Bob in the
    Wake of Each
    Others’ Masses
    Producing
    Gravitational
    Waves!

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  7. V = 13.3 mag
    H -> He
    fusion in core
    He -> C/O -> …
    fusion in core
    0.08-8 M¤
    8-15 M¤
    >15 M¤
    Stars Evolve; Some Blow Up!

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  8. V = 13.3 mag
    Binary Neutron Stars

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  9. V = 13.3 mag
    Hulse-Taylor Binary Pulsar
    – 14 –
    Porb
    = 7.75 hr
    Shrinking by
    0.076 ms/yr
    Nobel prize
    in 1993

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  10. V = 13.3 mag

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  11. phase = 0
    J0651+2844: A 12.75-min WD+WD Binary
    1 million times fainter than
    an unaided eye can see

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  12. Mid-Eclipse Times are Changing Rapidly!

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  13. Now:
    Porbit
    = 12.75 min
    500,000 yr from now:
    Porbit
    = 10 min
    750,000 yr from now:
    Porbit
    = 8.5 min
    1,000,000 yr from now:
    Porbit
    = 7 min
    Mass Transfer Begins

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  14. V = 13.3 mag
    Gravitational Waves Stretch
    Space, But Very Subtly
    ΔL
    L
    ~ 10-21
    Proton:
    10-15 m

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  15. V = 13.3 mag

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  16. V = 13.3 mag

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  17. V = 13.3 mag

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  18. V = 13.3 mag
    LIGO

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  19. V = 13.3 mag

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  20. V = 13.3 mag

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  21. V = 13.3 mag

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  22. V = 13.3 mag
    2017 Nobel Prize in Physics

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  23. 2017-08-17
    at 12:41 UTC

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  24. ~30 deg2 = 120 x full moon

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  25. V = 13.3 mag
    NGC 4993
    13:09:47.2 −23:23:04
    40 Mpc (130 Mly)
    V=12.4 E/S0 galaxy

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  26. 4.1-m SOAR telescope,
    Chile
    2017-08-23, t=+5.5 d

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  27. 2017-08-23T23:29:21.26
    I > 20.1 mag

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  28. V = 13.3 mag
    Jennifer Johnson

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  29. V = 13.3 mag
    Kyle Slinker, UNC Chapel Hill
    Gravitational Waves: Listening to
    Black Holes Collide
    Dr. Bart Dunlap, UNC Chapel Hill
    The Bangs and Whimpers of
    Stellar Collisions
    Tue
    Nov.
    7
    Free, All Ages Welcome
    Fullsteam Brewery, Durham, NC
    7-9 pm; Talks start at 7:30 pm
    Come Hear About
    Gravitational Waves
    Over Some
    High-Gravity Beers!
    @AoTTriangle
    facebook.com/aottriangle
    Nobel
    Approved!

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  30. V = 13.3 mag

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