Is There A Needle In The Haystack?
summary
Project uses Gaia catalog entries filtered for complete radial velocities then runs galpy orbit integration in Python/Jupyter with a logarithmic halo potential and RK integrator to rewind stars up to 10 Gyr. A small crawler parses messy fixed-width lines into valid objects, an animation visualizes three test orbits, and the search volume shrinks to stars in the corotation zone that neither cross nor get overtaken by spiral arms. Result: code works, Sun lies in a banana‑shaped safe region, far fewer targets to check.
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chapters (9)
- 0:00Introduction and motivation
- 2:40What are we searching for
- 8:05Spiral arms and dangers
- 13:05Choosing the right tools
- 16:22Visualizing the galaxy
- 24:36Processing Gaia catalog data
- 30:26Orbit integration simulation
- 36:04Results and implications
- 37:12Conclusion and Q&A
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