Spatially resolved HI absorption shows the 7-arcmin Galactic center halo lies both in front of and behind the +50 km/s cloud, placing it at the Galactic center.
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Distance to the Galactic centre 7$^\prime$ halo from HI absorption
Spatially resolved HI absorption shows the 7-arcmin Galactic center halo lies both in front of and behind the +50 km/s cloud, placing it at the Galactic center.