TY  - JOUR
A1  - Eigmüller, Philipp
A1  - Chaushev, Alexander
A1  - Gillen, Edward
A1  - Smith, Alexis
A1  - Nielsen, Louise D.
A1  - Turner, Oliver
A1  - Csizmadia, Szilard
A1  - Smalley, Barry
A1  - Bayliss, Daniel
A1  - Belardi, Claudia
A1  - Bouchy, Francois
A1  - Burleigh, Matthew R.
A1  - Cabrera, Juan
A1  - Casewell, Sarah L.
A1  - Chazelas, Bruno
A1  - Cooke, Benjamin F.
A1  - Erikson, Anders
A1  - Gansicke, Boris T.
A1  - Guenther, Maximilian N.
A1  - Goad, Michael R.
A1  - Grange, Andrew
A1  - Jackman, James A. G.
A1  - Jenkins, James S.
A1  - McCormac, James
A1  - Moyano, Maximiliano
A1  - Pollacco, Don
A1  - Poppenhäger, Katja
A1  - Queloz, Didier
A1  - Raynard, Liam
A1  - Rauer, Heike
A1  - Udry, Stephane
A1  - Walker, Simon. R.
A1  - Watson, Christopher A.
A1  - West, Richard G.
A1  - Wheatley, Peter J.
T1  - NGTS-5b
BT  - a highly inflated planet offering insights into the sub-Jovian desert
JF  - Astronomy and astrophysics : an international weekly journal
N2  - 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 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.
KW  - planets and satellites: detection
KW  - planets and satellites: gaseous planets
Y1  - 2019
U6  - https://doi.org/10.1051/0004-6361/201935206
SN  - 1432-0746
VL  - 625
PB  - EDP Sciences
CY  - Les Ulis
ER  -