A 95 GHz Methanol Emission Survey Toward Eight Small Supernova Remnants
  We report on a 95 GHz ($8_0-7_1$ A$^{+}$) methanol (CH$_3$OH) emission survey
with the Purple Mountain Observatory Delingha 13.7 m telescope. Eight supernova
remnants (SNRs) with angular size $\lesssim$ 10' were observed, but emission
was only detected in three SNRs near the Galactic center (Sgr A East, G
0.1-0.1, and G 359.92-0.09). CH$_3$OH emission mainly surrounds the SNRs and
can be decomposed into nine spatial peaks with velocity range of eight peaks
being (-30, 70) km s$^{-1}$, and the other (70, 120) km s$^{-1}$. They are
probably excited by interaction with these SNRs and adjacent molecular gas in
the central molecular zone (CMZ), although star formation may play an important
role in exciting CH$_3$OH emission in some regions of CMZ. We infer that tidal
action is unlikely to be an excitation source for CH$_3$OH emission.
