In 2019, the Galactic center black hole Sgr A* produced an unusually high number of bright near-infrared flares, including the brightest-ever detected flare. We propose that this activity was triggered by the near simultaneous infall of material shed by G1 and G2 objects due to their interaction with the background accretion flow. We discuss mechanisms by which S-stars and G-objects shed material, and estimate both the quantity of material and the infall time to reach the black hole.

中文翻译：

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2019年银河系中心黑洞的S0-2星、G1和G2天体及耀斑活动

2019 年，银河系中心黑洞 Sgr A* 产生了异常多的明亮近红外耀斑，包括有史以来探测到的最亮耀斑。我们认为该活动是由 G1 和 G2 天体由于与背景吸积流的相互作用而几乎同时掉落的物质触发的。我们讨论了 S 星和 G 天体脱落物质的机制，并估计了物质的数量和到达黑洞的下落时间。