论文标题
通过黑洞弹弓和“层间命令”探索M31
Exploration of M31 via Black-Hole Slingshots and the "Intergalactic Imperative"
论文作者
论文摘要
我表明，使用恒星质量黑洞（BH）旋转的Sgra*的引力弹弓可以向M31推出机器人航天器，以$ 0.1 \ $ 0.1 \，C $，这种速度最终受到钢和BH质量的抗议强度的限制，此处保守地估计为$ m_ _ {\ rm BH {\ rm bh} $ _______________尽管BH是黑暗的事实，但BH遭遇必须准确至$ \ Lessim 1 \，$ km。以重力微覆盖为指导的导航可以很容易地实现这一目标。将M31减速将依靠类似的参与度（但反向），在M31中心附近有轨道的BH。如有必要，同样进行返回旅行。因此，只要在接下来的几个MYR中重建人类，跨人类或数字数据中的Android，M31行星在50个MYR时标上的殖民化是可行的。讨论了对费米悖论（FP）的影响。 FP以更具挑战性的形式重述。在时间尺度上，与地球年龄短得多的时间标准上的静脉内定植的可能性显着收紧了FP。因此，它可以影响我们在几个时间尺度上的天体生物学方法。我建议使用紧密的白紫色二进制“轮毂”网络作为$ 0.002 \，C $ c $ - 半乳酸内运输系统的骨干，这将使对银河系的完整探索（因此在10 myr时台上完全测量了DRAKE方程中所有非零项）。这样的调查将揭示“星际命令式”的现实和/或严重性。
I show that a gravitational slingshot using a stellar-mass black hole (BH) orbiting SgrA* could launch robotic spacecraft toward M31 at $0.1\,c$, a speed that is ultimately limited by the tensile strength of steel and the BH mass, here conservatively estimated as $m_{\rm bh}=5\,M_\odot$. The BH encounter must be accurate to $\lesssim 1\,$km, despite the fact that the BH is dark. Navigation guided by gravitational microlensing can easily achieve this. Deceleration into M31 would rely on a similar engagement (but in reverse) with an orbiting BH near the M31 center. Similarly for a return trip, if necessary. Colonization of M31 planets on 50 Myr timescales is therefore feasible provided that reconstruction of humans, trans-humans, or androids from digital data becomes feasible in the next few Myr. The implications for Fermi's Paradox (FP) are discussed. FP is restated in a more challenging form. The possibility of intergalactic colonization on timescales much shorter than the age of Earth significantly tightens FP. It can thereby impact our approach to astrobiology on few-decade timescales. I suggest using a network of tight white-dwarf-binary "hubs" as the backbone of a $0.002\,c$ intra-Galactic transport system, which would enable complete exploration of the Milky Way (hence full measurement of all non-zero terms in the Drake equation) on 10 Myr timescales. Such a survey would reveal the reality and/or severity of an "intergalactic imperative".
