SMA Observations of Haro 2: Molecular Gas around a Hot Superbubble
  Haro 2 , a nearby dwarf starburst dwarf galaxy with strong Ly alpha emission,
hosts a starburst that has created outflows and filaments. The clear evidence
for galactic outflow makes it an ideal candidate for studying the effects of
feedback on molecular gas in a dwarf galaxy. We observed CO(2-1) in Haro 2 at
the Submillimeter Array in the compact and extended configurations, and have
mapped the molecular emission with velocity resolution 4.1 km/s and spatial
resolution 2.0x1.6". With this significant increase of resolution over previous
measurements we see that the molecular gas comprises two components: bright
clumps associated with the embedded star clusters of the starburst, and fainter
extended emission east of the starburst region. The extended emission coincides
with an X-ray bubble and has the kinematic signatures of a shell or bubble
expanding with velocity +-35 km/s. We suggest that the starburst winds that
created the X-Ray bubble have entrained molecular gas, and that the apparent
velocity gradient across the photometric axis is an artifact caused by the
outflow. The molecular and X-ray activity is on the east of the galaxy and the
ionized outflow and optical filaments are west; their relationship is not
clear.
