Philipp Eigmüller, Alexander Chaushev, Edward Gillen, Alexis Smith, Louise D. Nielsen, Oliver Turner, Szilard Csizmadia, Barry Smalley, Daniel Bayliss, Claudia Belardi, Francois Bouchy, Matthew R. Burleigh, Juan Cabrera, Sarah L. Casewell, Bruno Chazelas, Benjamin F. Cooke, Anders Erikson, Boris T. Gansicke, Maximilian N. Guenther, Michael R. Goad, Andrew Grange, James A. G. Jackman, James S. Jenkins, James McCormac, Maximiliano Moyano, Don Pollacco, Katja Poppenhäger, Didier Queloz, Liam Raynard, Heike Rauer, Stephane Udry, Simon. R. Walker, Christopher A. Watson, Richard G. West, Peter J. Wheatley
- Context. Planetary population analysis gives us insight into formation and evolution processes. For short-period planets, the sub-Jovian desert has been discussed in recent years with regard to the planet population in the mass/period and radius/period parameter space without taking stellar parameters into account. The Next Generation Transit Survey (NGTS) is optimised for detecting planets in this regime, which allows for further analysis of the sub-Jovian desert. Aims. With high-precision photometric surveys (e.g. with NGTS and TESS), which aim to detect short period planets especially around M/K-type host stars, stellar parameters need to be accounted for when empirical data are compared to model predictions. Presenting a newly discovered planet at the boundary of the sub-Jovian desert, we analyse its bulk properties and use it to show the properties of exoplanets that border the sub-Jovian desert. Methods. Using NGTS light curve and spectroscopic follow-up observations, we confirm the planetary nature of planet NGTS-5b andContext. Planetary population analysis gives us insight into formation and evolution processes. For short-period planets, the sub-Jovian desert has been discussed in recent years with regard to the planet population in the mass/period and radius/period parameter space without taking stellar parameters into account. The Next Generation Transit Survey (NGTS) is optimised for detecting planets in this regime, which allows for further analysis of the sub-Jovian desert. Aims. With high-precision photometric surveys (e.g. with NGTS and TESS), which aim to detect short period planets especially around M/K-type host stars, stellar parameters need to be accounted for when empirical data are compared to model predictions. Presenting a newly discovered planet at the boundary of the sub-Jovian desert, we analyse its bulk properties and use it to show the properties of exoplanets that border the sub-Jovian desert. Methods. Using NGTS light curve and spectroscopic follow-up observations, we confirm the planetary nature of planet NGTS-5b and determine its mass. Using exoplanet archives, we set the planet in context with other discoveries. Results. NGTS-5b is a short-period planet with an orbital period of 3.3569866 +/- 0.0000026 days. With a mass of 0.229 +/- 0.037 M-Jup and a radius of 1.136 +/- 0.023 R-Jup, it is highly inflated. Its mass places it at the upper boundary of the sub-Jovian desert. Because the host is a K2 dwarf, we need to account for the stellar parameters when NGTS-5b is analysed with regard to planet populations. Conclusions. With red-sensitive surveys (e.g. with NGTS and TESS), we expect many more planets around late-type stars to be detected. An empirical analysis of the sub-Jovian desert should therefore take stellar parameters into account.…
MetadatenAuthor details: | Philipp EigmüllerORCiD, Alexander Chaushev, Edward Gillen, Alexis Smith, Louise D. Nielsen, Oliver Turner, Szilard Csizmadia, Barry Smalley, Daniel Bayliss, Claudia Belardi, Francois Bouchy, Matthew R. Burleigh, Juan Cabrera, Sarah L. Casewell, Bruno Chazelas, Benjamin F. Cooke, Anders Erikson, Boris T. Gansicke, Maximilian N. Guenther, Michael R. Goad, Andrew Grange, James A. G. Jackman, James S. Jenkins, James McCormac, Maximiliano Moyano, Don Pollacco, Katja PoppenhägerORCiDGND, Didier Queloz, Liam RaynardORCiD, Heike Rauer, Stephane Udry, Simon. R. Walker, Christopher A. Watson, Richard G. West, Peter J. Wheatley |
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DOI: | https://doi.org/10.1051/0004-6361/201935206 |
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ISSN: | 1432-0746 |
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Title of parent work (English): | Astronomy and astrophysics : an international weekly journal |
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Subtitle (English): | a highly inflated planet offering insights into the sub-Jovian desert |
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Publisher: | EDP Sciences |
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Place of publishing: | Les Ulis |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/05/28 |
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Publication year: | 2019 |
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Release date: | 2021/02/03 |
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Tag: | planets and satellites: detection; planets and satellites: gaseous planets |
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Volume: | 625 |
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Number of pages: | 9 |
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Funding institution: | UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC) [ST/M001962/1]; STFCScience & Technology Facilities Council (STFC) [ST/L000733/1, ST/P000495/1, ST/N000757/1, ST/P000312/1, 1490409]; Swiss National Science Foundation (SNSF)Swiss National Science Foundation (SNSF); Winton Philanthropies; Isaac Newton Studentship; FondecytComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT [1161218]; CATA-Basal (CONICYT) [PB06]; STFC via an Ernest Rutherford Fellowship [ST/R00384X/1]; DFG priority program "Exploring the Diversity of Extrasolar Planets" [SPP 1992, RA 714/13-1]; Gruber Foundation Fellowship; European Research Council under the FP/2007-2013 ERC Grant [336480]; ARC - Wallonia-Brussels Federation; Simons Foundation [327127] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
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Peer review: | Referiert |
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Publishing method: | Open Access / Green Open-Access |
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