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arXiv 2210.10656physics.pop-phastro-ph.EPastro-ph.SR
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低质量恒星的银河系沉降作为费米悖论的解决方案

Galactic settlement of low-mass stars as a resolution to the Fermi paradox

Jacob Haqq-Misra, Thomas J. Fauchez

摘要:

一个扩张的文明可以迅速地在银河系中传播,所以太阳系中没有外星人定居意味着这种扩张主义文明不存在。这个论点,通常被称为费米悖论,通常假设膨胀会均匀地在星系中进行,但并非所有类型的恒星对长寿文明都同样有用。我们认为,低质量的恒星,特别是K-矮星,将是理想的迁移地点的文明起源于一个G-矮星系统。我们使用德雷克方程的修改形式来表明,所有低质量恒星的膨胀都可以在2 Gyr内完成,其中包括膨胀波之间的等待时间,以允许接近合适的目标恒星。这将需要星际旅行能力不超过0.3 ly来解决所有的M-矮星,不超过2 ly来解决所有的K-矮星。在200万年内可能会发生更快的膨胀,需要大约10光年的旅行才能解决所有的M矮星,大约50光年才能解决所有的K矮星。在系外行星系统中寻找技术特征可以帮助限制今天银河系中存在这样一个“低质量银河俱乐部”。

英文摘要:

An expanding civilization could rapidly spread through the galaxy, so the absence of extraterrestrial settlement in the solar system implies that such expansionist civilizations do not exist. This argument, often referred to as the Fermi paradox, typically assumes that expansion would proceed uniformly through the galaxy, but not all stellar types may be equally useful for a long-lived civilization. We suggest that low-mass stars, and K-dwarf stars in particular, would be ideal migration locations for civilizations that originate in a G-dwarf system. We use a modified form of the Drake Equation to show that expansion across all low-mass stars could be accomplished in 2 Gyr, which includes waiting time between expansion waves to allow for a close approach of a suitable destination star. This would require interstellar travel capabilities of no more than ~0.3 ly to settle all M-dwarfs and ~2 ly to settle all K-dwarfs. Even more rapid expansion could occur within 2 Myr, with travel requirements of ~10 ly to settle all M-dwarfs and ~50 ly to settle all K-dwarfs. The search for technosignatures in exoplanetary systems can help to place constraints on the presence of such a "low-mass Galactic Club" in the galaxy today.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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