G359.87+0.18, An FR II Radio Galaxy 15' from Sagittarius A*: Implications for the Scattering Region in the Galactic Center

摘要

G359.87 + 0.18 is an enigmatic object located 15' from Sgr A*. It has been variously classified as an extragalactic source, a Galactic jet source, and a young supernova remnant. We present new observations of G359.87 + 0.18 between 0.33 and 15 GHz and an H I absorption spectrum and use these to argue that this source is an FR II radio galaxy. We are able to place a crude limit on its redshift of z >/approximatley 0.1. The source has a spectral index of alpha.