The center of our galaxy
Its position agrees with the centroid of the 2.2μ radiation, which is believed to come from stars at the galactic center.
It has a recombination line of halfwidth ∼200 km s−1, 4 to 5 times larger than that of any spiral arm H II region.
At its center lies the remarkable radio point source, which has a brightness temperature >107 K, and which may be the actual nucleus of the Galaxy. *** DIRECT SUPPORT *** A3418034 00012