NOAO >   Observing Info >   Approved Programs >   2014A-0229

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Proposal Information for 2014A-0229


PI: Gaspar Bakos, Princeton University, gbakos@astro.princeton.edu
Address: Department of Astrophysical Sciences, 4 Ivy Lane, Peyton Hall, Princeton, NJ 08544, USA

CoI: Joel D. Hartman, Princeton University
CoI: Daniel Bayliss, Australian National University
CoI: Andres Jordan, Pontificia Universidad Catolica de Chile
CoI: Bun'ei Sato, Tokyo Institute of Technology

Title: Confirmation of transiting Neptunes from HATNet and HATSouth using Keck/HIRES and Subaru/HDS

Abstract: Wide-field photometric observations by the HATNet and HATSouth projects have identified ~ 1700 candidate transiting exoplanets (TEPs) around moderately bright stars (V \la 14), leading to the publication of \bf 49 TEPs, with many more confirmed planets undergoing analysis. Among the objects that we have identified are nine promising candidate transiting Neptunes. Only a handful of well- characterized Neptunes are known, and fewer still are known around bright stars, so it is imperative to confirm and characterize these candidates. \bf Here we are proposing for 2 nights each on Keck/HIRES and Subaru/HDS (4 nights altogether) to confirm 6 of these candidate Neptunes. These are around moderately bright stars (V \lesssim 13) and most have prior follow-up observations, including moderately high- precision RVs which place upper limits on the RV semiamplitudes ruling out hot Jupiters. If confirmed, these planets would represent a substantial increase in the number of well characterized Neptune-size planets with masses and radii measured to better than ~ 20% precision, and orbiting stars bright enough to permit further follow-up. We note that the HATSouth project is an equal collaboration between researchers in the US, Chile and Australia. For the Subaru/HDS component of this proposal, we request that the time allocation be split evenly between the NOAO, Chilean and Australian Gemini TACs.


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NOAO >   Observing Info >   Approved Programs >   2014A-0229

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