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Following the TraCS of exoplanets with Pan-Planets: Wendelstein-1b and Wendelstein-2b
- Publication Year :
- 2020
-
Abstract
- Hot Jupiters seem to get rarer with decreasing stellar mass. The goal of the Pan-Planets transit survey was the detection of such planets and a statistical characterization of their frequency. Here, we announce the discovery and validation of two planets found in that survey, Wendelstein-1b and Wendelstein-2b, which are two short-period hot Jupiters that orbit late K host stars. We validated them both by the traditional method of radial velocity measurements with the HIgh Resolution Echelle Spectrometer (HIRES) and the Habitable-zone Planet Finder (HPF) instruments and then by their Transit Color Signature (TraCS). We observed the targets in the wavelength range of $4000 - 24000$ Angstr\"om and performed a simultaneous multiband transit fit and additionally determined their thermal emission via secondary eclipse observations. Wendelstein-1b is a hot Jupiter with a radius of $1.0314_{-0.0061}^{+0.0061}$ $R_J$ and mass of $0.592_{-0.129}^{+0.165}$ $M_J$, orbiting a K7V dwarf star at a period of $2.66$ d, and has an estimated surface temperature of about $1727_{-90}^{+78}$ K. Wendelstein-2b is a hot Jupiter with a radius of $1.1592_{-0.0210}^{+0.0204}$ $R_J$ and a mass of $0.731_{-0.311}^{+0.541}$ $M_J$, orbiting a K6V dwarf star at a period of $1.75$ d, and has an estimated surface temperature of about $1852_{-140}^{+120}$ K. With this, we demonstrate that multiband photometry is an effective way of validating transiting exoplanets, in particular for fainter targets since radial velocity (RV) follow-up becomes more and more costly for those targets.<br />Comment: 14 pages, 12 figures. Accepted for publication in A&A
Details
- Database :
- OAIster
- Notes :
- Obermeier, Christian, Steuer, Jana, Kellermann, Hanna, Saglia, Roberto P., Henning, Thomas, Riffeser, Arno, Hopp, Ulrich, Stefansson, Guðmundur, CanĚas, Caleb, Ninan, Joe P., Mahadevan, Suvrath, Isaacson, Howard, Howard, Andrew W., Livingston, John H., Koppenhoefer, Johannes, Bender, Ralf
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1363528378
- Document Type :
- Electronic Resource
- Full Text :
- https://doi.org/10.1051.0004-6361.202037715