Systematic effects on the diversity of dwarf galaxies rotation curves
  Cosmological simulations of structure formation are invaluable to study the
evolution of the Universe and the development of galaxies in it successfully
reproducing many observations in the context of the cosmological paradigm
$\Lambda$CDM. However, there are remarkable discrepancies with observations
that are a matter of debate. One of the most recently reported is the diversity
of shapes in the rotation curves of dwarf galaxies in the local Universe which
is in contrast to the apparent homogeneity of rotation curves in cosmological
hydrodynamic simulations. Previous studies on similar problems have shown that
sometimes can be alleviated by accounting for the impact of observational
effects in the comparison. For this reason, in this work we present a set of
controlled experiments to measure the impact that some systematic effects,
associated with modeling the observation process in a realistic way, have on
the diversity of synthetic rotation curves. Our results demonstrate that
factors such as spectral power, spatial resolution and inclination angle, can
naturally induce noticeable fluctuations on the shape of the rotation curves,
reproducing up to $47\%$ of the diversity reported in the observations. This is
remarkable, especially considering that we limited the sample to
highly-symmetric disks simulated in isolation. This shows that a more realistic
modeling of synthetic rotation curves may alleviate the reported tension
between simulations and observations, without posing a challenge to the
standard cosmological model of cold dark matter.
