Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program

TL;DR

This paper reports the discovery of five new long-period, eccentric, jovian-mass exoplanets orbiting G and K dwarf stars from the Magellan velocity survey, expanding knowledge of planetary system diversity.

Contribution

It presents five newly discovered exoplanets with detailed orbital parameters, highlighting their eccentric orbits and mass estimates, from the Magellan Planet Search Program.

Findings

Five new exoplanets with eccentric orbits discovered.

Planets have masses ranging from 1.5 to 7.8 Jupiter masses.

Orbits have semi-major axes between 1.3 and 3.2 AU.

Abstract

Five new planets orbiting G and K dwarfs have emerged from the Magellan velocity survey. These companions are jovian-mass planets in eccentric (e \geq 0.24) intermediate and long-period orbits. HD 86226b orbits a solar metallicity G2 dwarf. The MP sin i mass of the planet is 1.5 MJUP, the semi-major axis is 2.6 AU, and the eccentricity 0.73. HD 129445b orbits a metal rich G6 dwarf. The minimum mass of the planet is MP sin i =1.6 MJUP, the semi-major axis is 2.9 AU, and the eccentricity 0.70. HD 164604b orbits a K2 dwarf. The MP sin i mass is 2.7 MJUP, semi-major axis is 1.3 AU, and the eccentricity is 0.24. HD 175167b orbits a metal rich G5 star. The MP sin i mass is 7.8 MJUP, the semi-major axis is 2.4 AU, and the eccentricity 0.54. HD 152079b orbits a G6 dwarf. The MP sin i mass of the planet is 3 MJUP, the semi-major axis is 3.2 AU, and the eccentricity is 0.60.