Fast radio burst FRB 20180916B in its host galaxy SDSS J015800.28+654253.0 at 149 Mpc is by far the closest-known FRB with a robust host galaxy association. The source also exhibits a 16.35 day period in its bursting. Here we present optical and infrared imaging as well as integral field spectroscopy observations of FRB 20180916B with the WFC3 camera on the Hubble Space Telescope and the MEGARA spectrograph on the 10.4 m Gran Telescopio Canarias. The 60–90 milliarcsecond (mas) resolution of the Hubble imaging, along with the previous 2.3 mas localization of FRB 20180916B, allows us to probe its environment with a 30–60 pc resolution. We constrain any point-like star formation or H ii region at the location of FRB 20180916B to have an Hα luminosity L _Hα ≲ 10³⁷ erg s⁻¹, and we correspondingly constrain the local star formation rate to be ≲10⁻⁴ M_⊙ yr⁻¹. The constraint on Hα suggests that possible stellar companions to FRB 20180916B should be of a cooler, less massive spectral type than O6V. FRB 20180916B is 250 pc away (in projected distance) from the brightest pixel of the nearest young stellar clump, which is ∼380 pc in size (FWHM). With the typical projected velocities of pulsars, magnetars, or neutron stars in binaries (60–750 km s⁻¹), FRB 20180916B would need 800 kyr to 7 Myr to traverse the observed distance from its presumed birth site. This timescale is inconsistent with the active ages of magnetars (≲10 kyr). Rather, the inferred age and observed separation are compatible with the ages of high-mass X-ray binaries and gamma-ray binaries, and their separations from the nearest OB associations.

149 Mpc的其主机星系SDSS J015800.28 + 654253.0中的快速无线电爆发FRB 20180916B是迄今为止最著名的具有强大主机星系关联的FRB。该消息源还处于16.35天的爆发期。在这里，我们展示了哈勃太空望远镜上的WFC3相机和10.4 m Gran Telescopio Canarias上的MEGARA光谱仪对FRB 20180916B的光学和红外成像以及积分场光谱学观察。哈勃成像的60–90毫秒（质量）分辨率，以及FRB 20180916B以前的2.3 mas本地化分辨率，使我们能够以30–60 pc的分辨率探测其环境。我们限制任何点状恒星形成或H II区域在FRB 20180916B的位置具有H α光度大号 _ħα ≲10 ³⁷尔格小号^-1，我们相应约束本地恒星形成速率为≲10 ^-4中号_⊙年^-1。上H中的约束α表明可能恒星同伴FRB 20180916B应该是一个冷却器，小质量光谱型比O6V的。FRB 20180916B与最近的年轻恒星丛的最亮像素相距250 pc（投影距离），约为380 pc（FWHM）。具有双星中脉冲星，磁星或中子星的典型投影速度（60–750 km s ^-1），FRB 20180916B将需要800 kyr至7 Myr才能从假定的出生地点穿越观察到的距离。这个时间尺度与磁星的活跃年龄（≲10Kyr）不一致。而是，推断的年龄和观察到的分离与高质量X射线双星和伽马射线双星的年龄以及它们与最近的OB关联的距离兼容。