Question
An early theory suggested that one of these events from Geminga was responsible for the low-density of the Local Bubble. For 10 points each:
[10m] Name these events which can be dated by the presence of Mn-53 (“manganese 53”), Fe-60 (“iron 60”), or Pu-244 (“plutonium 244”) in deep sea rock. Adrian Mellot proposed that the Late Ordivician extinction was caused by one of these events damaging the earth’s atmosphere.
ANSWER: supernova [accept hypernova; accept gamma ray burst or GRB; prompt on black-hole or neutron star or white-dwarf mergers]
[10e] Near Earth supernovae and gamma ray bursts could conceivably cause extinctions by damaging the “layer” of this triatomic allotrope of oxygen in the upper atmosphere.
ANSWER: ozone [prompt on O3 (“O-three”)]
[10h] The nearest candidate for a potentially future Near Earth Supernova is located in this constellation which contains the Einstein Cross, a lensed quasar. This constellation contains the first known exoplanet to orbit a Sun-like star.
ANSWER: Pegasus [accept IK Pegasi B and 51 Pegasi B]
<KT, Other Science: Earth Science>
Summary
| 2023 ARCADIA at Duke | Emory, Duke, Yale | Y | 4 | 12.50 | 100% | 0% | 25% |
| 2023 ARCADIA at Emory | Emory, Duke, Yale | Y | 4 | 17.50 | 100% | 50% | 25% |
| 2023 ARCADIA at Maryland | Maryland, Online | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Ohio State | Ohio State, Texas | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA Online | Maryland, Online | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Texas | Ohio State, Texas | Y | 3 | 10.00 | 100% | 0% | 0% |
Data
| George Washington A | Georgetown | 0 | 10 | 0 | 10 |
| Johns Hopkins | Maryland B | 0 | 10 | 0 | 10 |
| Maryland A | George Washington B | 0 | 10 | 0 | 10 |