TY - JOUR
T1 - Following the TraCS of exoplanets with Pan-Planets
T2 - Wendelstein-1b and Wendelstein-2b
AU - Obermeier, C.
AU - Steuer, J.
AU - Kellermann, H.
AU - Saglia, R. P.
AU - Henning, Th
AU - Riffeser, A.
AU - Hopp, U.
AU - Stefansson, G.
AU - Cañas, C.
AU - Ninan, J.
AU - Mahadevan, S.
AU - Isaacson, H.
AU - Howard, A. W.
AU - Livingston, J.
AU - Koppenhoefer, J.
AU - Bender, R.
N1 - Publisher Copyright:
© C. Obermeier et al. 2020.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - 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 and the Habitable-zone Planet Finder instruments and then by their Transit Color Signature (TraCS). We observed the targets in the wavelength range of 4000-24 000 Å 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 0.592-0.129+0.0165 MJ, 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 RJ and a mass of 0.731-0.311+0.0541 MJ, 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 follow-up becomes more and more costly for those targets.
AB - 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 and the Habitable-zone Planet Finder instruments and then by their Transit Color Signature (TraCS). We observed the targets in the wavelength range of 4000-24 000 Å 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 0.592-0.129+0.0165 MJ, 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 RJ and a mass of 0.731-0.311+0.0541 MJ, 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 follow-up becomes more and more costly for those targets.
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U2 - 10.1051/0004-6361/202037715
DO - 10.1051/0004-6361/202037715
M3 - Article
AN - SCOPUS:85088709243
SN - 0004-6361
VL - 639
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A130
ER -