Title: HATS-43b, HATS-44b, HATS-45b, and HATS-46b: Four Short Period Transiting Giant Planets in the Neptune-Jupiter Mass Range,
Abstract: We report the discovery of four short period extrasolar planets transiting
moderately bright stars from photometric measurements of the HATSouth network
coupled to additional spectroscopic and photometric follow-up observations.
While the planet masses range from 0.26 to 0.90 M$_J$, the radii are all
approximately a Jupiter radii, resulting in a wide range of bulk densities. The
orbital period of the planets range from 2.7d to 4.7d, with HATS-43b having an
orbit that appears to be marginally non-circular (e= 0.173$\pm$0.089). HATS-44
is notable for a high metallicity ([Fe/H]= 0.320$\pm$0.071). The host stars
spectral types range from late F to early K, and all of them are moderately
bright (13.3<V<14.4), allowing the execution of future detailed follow-up
observations. HATS-43b and HATS-46b, with expected transmission signals of 2350
ppm and 1500 ppm, respectively, are particularly well suited targets for
atmospheric characterisation via transmission spectroscopy.