SDSS-IV MaNGA: Blueberry Candidates Associated with LSB Galaxies $-$
  Merger or Tidal Dwarf Systems ?
  We report here our finding of two new blueberry galaxies using optical IFU
spectroscopic data from the MaNGA survey. Both the blueberries are found to be
compact ($\leq$ $1 - 2$ kpc) starburst systems located at the outskirts of Low
Surface Brightness (LSB) galaxies. Our blueberries have the lowest stellar
masses $\sim$ 10$^{5}$ M$_{\odot}$ amongst the locally known blueberry
galaxies. We find a significantly large mean metallicity difference ($\sim$ 0.5
dex) between the blueberry sources and their associated LSBs. Moreover, the
radial metallicity gradients in our blueberries are also different than their
respective LSBs - suggesting that these had significantly different metallicity
histories. The likelihood of survival of these blueberries as TDGs is analyzed
based on their structural and kinematic properties. Our analysis shows that
although the two blueberries are stable against internal motions, they would
not have survived against the tidal force of the host galaxy. Based on the
velocity difference between the host LSBs and the blueberries, it appears that
they are compact, starburst systems in their advanced stage of merger with
these LSBs situated in a dense environment. Implications of our findings are
discussed.
