Abstract
The detailed study of the exoplanetary systems HD189733 and HD209458 has given rise to a wealth of exciting information on the physics of exoplanetary atmospheres. To further our understanding of the make-up and processes within these atmospheres we require a larger sample of bright transiting planets. We have began a project to detect more bright transiting planets in the southern hemisphere by utilising precision radial-velocity measurements. We have observed a constrained sample of bright, inactive and metal-rich stars using the HARPS instrument and here we present the current status of this project, along with our first discoveries which include a brown dwarf/extreme-Jovian exoplanet found in the brown dwarf desert region around the star HD191760 and improved orbits for three other exoplanetary systems HD48265, HD143361 and HD154672. Finally, we briefly discuss the future of this project and the current prospects we have for discovering more bright transiting planets.
Highlights
Precision radial velocity studies of the nearest stars have given rise to a new branch of astrophysics
In these proceedings we give a status update of the Calan-Hertfordshire Extrasolar Planet Search, an international collaboration led from Chile that aims to discover more planets around super metal-rich and Sun-like stars, and follow these up with precision photometry to hunt for new bright transit planets
The census of planetary systems within around 50 pc or so from the Sun that host gas giants has been well studied out to orbits approaching that of Jupiter ([1, 2])
Summary
Precision radial velocity studies of the nearest stars have given rise to a new branch of astrophysics. Given that stellar metallicity plays a key role in the formation of planets and their final configurations, studying sub-samples of stars like the Sun as a function of metallicity can allow one to target specific types of planets With this in mind we started a planet search project on the HARPS spectrograph, as part of a collaboration between the Universidad de Chile and the University of Hertfordshire, that aims to discover more gas giants around super metal-rich stars in the southern hemisphere and follow them up with Chilean facilities to test if they transit their parent stars. In this conference proceedings we discuss some of the recent findings from our Calan-Hertfordshire Extrasolar Planet Search project and future paths the project will take
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