Tidal tails in the disintegrating open cluster NGC 752
  We utilize the robust membership determination algorithm, ML-MOC, on the
precise astrometric and deep photometric data from Gaia Early Data Release 3
within a region of radius 5$^{\circ}$ around the center of the intermediate-age
galactic open cluster NGC 752 to identify its member stars. We report the
discovery of the tidal tails of NGC 752, extending out to $\sim$35 pc on either
side of its denser central region and following the cluster orbit. From
comparison with PARSEC stellar isochrones, we obtain the mass function of the
cluster with a slope, $\chi=-1.26\pm0.07$. The high negative value of $\chi$ is
indicative of a disintegrating cluster undergoing mass-segregation. $\chi$ is
more negative in the intra-tidal regions as compared to the outskirts of NGC
752. We estimate a present day mass of the cluster, M$\rm_{C}=297\pm10$
M$_{\odot}$. Through mass-loss due to stellar evolution and tidal interactions,
we further estimate that NGC 752 has lost nearly 95.2-98.5 % of its initial
mass, $\rm M_{i}~=~0.64~-2~\times~10^{4}~M_{\odot}$.
