Subaru HSC weak lensing of SDSS redMaPPer cluster satellite galaxies:
  Empirical upper limit on orphan fractions
  Weak gravitational lensing directly probes the matter distribution
surrounding satellite galaxies in galaxy clusters. We measure the weak lensing
signal induced on the shapes of background galaxies around SDSS redMaPPer
cluster satellite galaxies, which have their central galaxies assigned with a
probability $P_{\rm cen}>0.95$ in the redshift range, $0.1\leq z\leq 0.33$. We
use the galaxy shapes from the Subaru Hyper Suprime-Cam (HSC) survey for this
purpose. We bin satellite galaxies by their distance from the cluster centre
and compare it to the signal around a control sample of galaxies which do not
reside in clusters but have similar colours and magnitudes. We explore the
effect of environmental processes on the dark matter mass around satellites. We
see hints of a difference in the mass of the subhalo of the satellite compared
to the halo masses of galaxies in our control sample, especially in the
innermost cluster-centric radial bin ($0.1<r<0.3$ [$h^{-1}\rm Mpc$]). For the
first time, we put an upper limit on the prevalence of orphan galaxies which
have entirely lost their dark matter halos with cluster-centric distances with
the help of our measurements. However, these upper limits could be relaxed if
there is substantial contamination in the satellite galaxy sample.
