Packet I: Bonus 1
Answer the following about hypervelocity stars, for 10 points each.
[10e] Hypervelocity stars are typically defined as exceeding this velocity, the velocity required for an object to overcome a central body’s gravity.
ANSWER: escape velocity
[10h] Hypervelocity stars are generated from the three-body interaction between a supermassive black hole and a binary system in a mechanism named for this astronomer. He names the hypothesized circumstellar disk that spans the interior of the Oort cloud.
ANSWER: Jack G. Hills [or Hills cloud; reject “Hill” or “Hill sphere”]
[10m] Most hypervelocity stars were discovered by this now-retired ESA telescope, which was the successor to the Hipparcos mission. Its third data release includes data on nearly 2 billion stars, making it the most comprehensive survey of the Milky Way.
ANSWER: Gaia
<GC, Other Science> | Packet I - McGill B, UCLA A, Michigan B, Georgia Tech C, Southampton B
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 63 | 10.79 | 95% | 11% | 2% |
Conversion
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| California (North) | Main Site | ✓ | 3 | 13.33 | 100% | 33% | 0% |
| Canada | Main Site | ✓ | 1 | 10.00 | 100% | 0% | 0% |
| Florida | Main Site | ✓ | 3 | 10.00 | 100% | 0% | 0% |
| Lower Mid-Atlantic | Main Site | ✓ | 9 | 7.78 | 78% | 0% | 0% |
| Midwest | Main Site | ✓ | 9 | 8.89 | 89% | 0% | 0% |
| Northeast | Main Site | ✓ | 6 | 15.00 | 100% | 33% | 17% |
| Overflow | Main Site | ✓ | 4 | 10.00 | 100% | 0% | 0% |
| South Central | Main Site | ✓ | 2 | 10.00 | 100% | 0% | 0% |
| Southeast | Main Site | ✓ | 7 | 12.86 | 100% | 29% | 0% |
| UK | Main Site | ✓ | 6 | 11.67 | 100% | 17% | 0% |
| Upper Mid-Atlantic | Main Site | ✓ | 9 | 11.11 | 100% | 11% | 0% |
| Upstate NY | Main Site | ✓ | 4 | 10.00 | 100% | 0% | 0% |