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

Obermeier, C., Steuer, J., Kellermann, H., Saglia, R. P., Henning, T., Riffeser, A., et al. (2020). Following the TraCS of exoplanets with Pan-Planets: Wendelstein-1b and Wendelstein-2b. Astronomy and Astrophysics, 639: A130. doi:10.1051/0004-6361/202037715.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-30C2-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-3499-2
Genre: Journal Article

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 Creators:
Obermeier, C.1, Author              
Steuer, J.1, Author              
Kellermann, H.1, Author              
Saglia, R. P.1, Author              
Henning, Th., Author
Riffeser, A., Author
Hopp, U.1, Author              
Stefansson, G., Author
Cañas, C., Author
Ninan, J., Author
Mahadevan, S., Author
Isaacson, H., Author
Howard, A. W., Author
Livingston, J., Author
Koppenhoefer, J.1, Author              
Bender, R.1, Author              
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 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 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<sub>−0.0061</sub> <sup>+0.0061</sup> R<sub>J</sub> and mass of 0.592<sub>−0.129</sub> <sup>+0.0165</sup> M<sub>J</sub>, orbiting a K7V dwarf star at a period of 2.66 d, and has an estimated surface temperature of about 1727<sub>−90</sub> <sup>+78</sup> K. Wendelstein-2b is a hot Jupiter with a radius of 1.1592<sub>−0.0210</sub> <sup>+0.0204</sup> R<sub>J</sub> and a mass of 0.731<sub>−0.311</sup> <sup>+0.0541</sup> M<sub>J</sub>, orbiting a K6V dwarf star at a period of 1.75 d, and has an estimated surface temperature of about 1852<sub>−140</sub> <sup>+120</sup> 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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Language(s): eng - English
 Dates: 2020-07-21
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202037715
Other: LOCALID: 3257827
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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 639 Sequence Number: A130 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1