“2021年IOAA理论第11题-抛射体的最小速度”的版本间的差异
Jingsong Guo（讨论 | 贡献） |
Jingsong Guo（讨论 | 贡献） |
||
| 第12行： | 第12行： | ||
To find out which of these two events (SN, GW) releases more energy, estimate | To find out which of these two events (SN, GW) releases more energy, estimate | ||
| − | the energy ratio $$ | + | the energy ratio $$\dfrac{𝐸_{𝑆𝑁}} |
| − | { | + | {𝐸_{𝐺𝑊}}$$ |
. | . | ||
2022年3月9日 (三) 21:46的版本
英文题目
LIGO (5 points) The first detection of gravitational waves GW150414 was announced in 2016 by the collaboration LIGO (Laser Interferometer Gravitational-Wave Observatory). The detected signal corresponds to the merger of two black holes with masses of $$35𝑀_⊙$$ and $$30𝑀_⊙$$, which when joined formed a black hole of $$62𝑀_⊙$$. Ignoring the rotational energies of the black holes, you may assume that the energy released by this process (𝐸𝐺𝑊 ) is emitted solely in the form of gravitational waves, that were observed by the interferometer in 2015. You are given that the explosion of a supernova (SN) releases $$𝐸_{𝑆𝑁} = 2 × 10^{44} 𝐽$$ .
1.1
To find out which of these two events (SN, GW) releases more energy, estimate the energy ratio $$\dfrac{𝐸_{𝑆𝑁}} {𝐸_{𝐺𝑊}}$$ .
