6.7 GHz CH3OH absorption towards the N3 Galactic Center point-source
  We present evidence of 6.7 GHz methanol (CH3OH)~and 4.8 GHz formaldehyde
(H2CO) absorption towards the Galactic Center (GC) point-source `N3'. Both
absorption features are unresolved and spatially aligned with N3. The 6.7 GHz
CH3OH contains a single velocity component (centered at ~10 km/s) while the 4.8
GHz H2CO shows two velocity components (centered at ~-3 and +8 km/s). We find
that the velocity of these absorption components are similar to that of
emission lines from other molecules (e.g., SiO and H3CN) detected toward this
compact-source (-13 to +25 km/s; `N3 cloud'). The detection of these absorption
features is a firm indication that some of the molecular gas in the N3
molecular cloud is on the near-side of the continuum source. Analysis of the
CH3OH absorption kinematics shows a relatively large velocity dispersion (3.8
km/s) for the size scale of this feature (<0.1'', <0.01 pc at the GC; Ludovici
et al. 2016), when compared with other similar size GC clouds in the Larson
linewidth-size relationship. Further, this linewidth is closer to velocity
dispersion measurements for size scales of 1.3 pc, which is roughly the width
of the N3 cloud (25''; 1.0 pc). We argue that this relatively broad linewidth,
over a small cross-sectional area, is due to turbulence through the depth of
the cloud, where the cloud has a presumed line-of-sight thickness of ~1 pc.
