  Considering the possibility of complex organic molecules and microbial life
appearing under the ice shell of those satellites in the Solar system, this
study investigates the possible analog sources (targeting the potential ice
satellite hosting, Jupiter and Saturn-like planets in exoplanet databases) and
the transport of such bioaerosols in an attempt to support or contradict
Panspermia, a fringe theory about the fertilization of Earth. Along many
general parameters of the candidate planets, the host star, and the star
system, additional factors thought to be related to Panspermia were also
considered (e.g., the evolution of icy satellites, the frequency of impact
related ejection, the traveling time from a source, and so on), revealing the
following results. Eleven exosystems, with candidate gas giants hosting icy
satellites, were found in a database listing more than 5000 exoplanets. The
exomoons of the oldest systems (c.a. > 8 Ga; HD 191939, HD 4203, and HD 34445)
could have developed rapidly considering the short formation time (~100 Myrs),
which may result in the overlap of the putative early biological evolution and
asteroid bombardment phase, providing a higher chance to bioaerosol ejection to
space due to frequent collisions. However, the direct transfer might have
occurred too early, even before our Solar system was formed, which prevented
the fertilization of the latter. A longer formation of the exomoons (~3 Gyrs)
significantly reduces the chance of ejection into space by asteroid impacts,
which become less frequent over time, but increased the chance of arrival in
time to the Solar system. Younger systems, such as HD 217107, HD 219828, HD
140901, and HD 156279 (c.a. 4 to 6 Ga), are better candidates of putative
microbe source if the short icy satellite formation, along the higher impact
and ejection frequency are expected considering direct transport from those
systems.
