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SETI in the Spatio-Temporal Survey Domain

9332028514858a918dc4af231d4cb4bc?s=47 James Davenport
September 30, 2019

SETI in the Spatio-Temporal Survey Domain

A short lunch talk I gave to the DIRAC Institute at the University of Washington's Department of Astronomy. Here I discuss the paper I recently submitted to the Astronomical Journal (AJ) on using modern wide field, time domain surveys to carry out a new generation of SETI or "Technosignature" work.

9332028514858a918dc4af231d4cb4bc?s=128

James Davenport

September 30, 2019
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  1. SETI in the Spatio-Temporal Survey Domain James R. A. Davenport

    (UW) jradavenport arxiv.org/abs/1907.04443
  2. 2 jradavenport arxiv.org/abs/1907.04443 #1. Optical Surveys can do SETI TESS

    LSST Soap Box: We need more literature on possible ideas/signals
  3. 3 jradavenport arxiv.org/abs/1907.04443 #1. Optical Surveys can do SETI TESS

    LSST Opportunity: Search Algorithms are Portable & Extensible!
  4. 4 jradavenport arxiv.org/abs/1907.04443 #2. Surveys might be Good at SETI

    As with all astrophysics: surveys can dominate if you frame your science question the right way
  5. Needle in an N-Dimensional Haystack e.g. see Wright, Kanodia, &

    Lubar (2018) integration time area sensitivity transmitter strength distance signal cadence/time polarization modulation bandwidth 5 jradavenport arxiv.org/abs/1907.04443
  6. jradavenport 6 Typical Radio SETI e.g. see Wright, Kanodia, &

    Lubar (2018) “Haystack” Volume arxiv.org/abs/1907.04443 Needle in an N-Dimensional Haystack
  7. jradavenport 7 arxiv.org/abs/1907.04443 Needle in an N-Dimensional Haystack Traditional Radio

    SETI Optical Survey SETI e.g. see Wright, Kanodia, & Lubar (2018)
  8. 8 jradavenport arxiv.org/abs/1907.04443 #3. Trivial Example(s) What kinds of signals

    are we considering? Examples utilizing both the spatial and temporal domains https://arxiv.org/abs/1812.08681
  9. 9 Dyson sphere? jradavenport

  10. 10 “Boyajian’s star” 20% flux dips! Kepler 1-2% variation Ground-based

    Kepler slow 3% fade jradavenport
  11. 11 Simulated VASCO Data Time Flux Time (decades) Flux e.g.

    Villarroel et al. (2016) jradavenport VASCO:
 Vanishing & Appearing Sources over a Century of Observations *this team interested in ZTF forced phot for validation!
  12. 12 jradavenport Transits - an energy efficient beacon? orbital phase

    residual L. Arnold (2005) Weird transit shapes from artificial objects Coordinated in time, Porb, or space?
  13. 13 jradavenport Missing Transits D. Kipping & A. Teachey (2016)

    “Laser cloaking” Time Flux ?
  14. 14 jradavenport arxiv.org/abs/1907.04443 #3. Trivial Example(s) Clusters of Similarity e.g.

    spatial clustering of exoplanet transit periods Could be any clustering! arbitrary distribution function
  15. 15 jradavenport arxiv.org/abs/1907.04443 #3. Trivial Example(s) Recipe 1. Large sample

    of exoplanet properties 2. K-nearest clustering 3. Search for outliers
  16. 16 jradavenport arxiv.org/abs/1907.04443 #4. Future Directions

  17. 17 Fl295 - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3734115 jradavenport Searching

    for Lighthouses
  18. jradavenport 18 Searching for Lighthouses Repeating, non-periodic patterns Fibonacci pulses

    NEW https://github.com/TheAstroFactory/SDM
  19. 19 jradavenport Phase Phase Fibonacci: Wrong Timescale Correct Timescale Repeating,

    non-periodic patterns Flux https://github.com/TheAstroFactory/SDM
  20. 20 jradavenport Timescale Pattern Start Time Repeating, non-periodic patterns IT

    WORKS! But, it’s slow (obv) https://github.com/TheAstroFactory/SDM
  21. 21 jradavenport #4. Future Directions Search for clusters or outliers

    in N-dimensional properties
  22. 22 jradavenport arxiv.org/abs/1907.04443 #4. Future Directions #3. Trivial Example(s) #2.

    Surveys might be Good at SETI #1. Optical Surveys can do SETI