Ultraviolet-detected Fermi bubble clouds have metallicities that are consistent with the clouds having two origins: the Milky Way disk and halo. This result adds complexity to the previously accepted picture that these clouds could only be launched from the disk of the Milky Way into the bubbles.

中文翻译：

---

费米气泡云起源于银河系的圆盘和光晕

紫外线探测到的费米气泡云的金属丰度与具有两个起源的云一致：银河系圆盘和光晕。这一结果增加了先前接受的图景的复杂性，即这些云只能从银河系的圆盘发射到气泡中。