Wendelstein-1 b & Wendelstein-2 b

Subject: Wendelstein-1 b & Wendelstein-2 b 30th May 2020, 3:59 am

Haven't these planets been noticed?

Following the TraCS of exoplanets with Pan-Planets: Wendelstein-1b and Wendelstein-2b

Quote :: 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 Angström 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 RJ and mass of 0.592+0.165−0.129 MJ, orbiting a K7V dwarf star at a period of 2.66 d, and has an estimated surface temperature of about 1727+78−90 K. Wendelstein-2b is a hot Jupiter with a radius of 1.1592+0.0204−0.0210 RJ and a mass of 0.731+0.541−0.311 MJ, orbiting a K6V dwarf star at a period of 1.75 d, and has an estimated surface temperature of about 1852+120−140 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.