@article{31ef2fef042c44dd88b4b0fa1dda04e0,
title = "NGTS-14Ab: A Neptune-sized transiting planet in the desert",
abstract = "Context. The sub-Jovian, or Neptunian, desert is a previously identified region of parameter space where there is a relative dearth of intermediate-mass planets with short orbital periods. Aims. We present the discovery of a new transiting planetary system within the Neptunian desert, NGTS-14. Methods. Transits of NGTS-14Ab were discovered in photometry from the Next Generation Transit Survey (NGTS). Follow-up transit photometry was conducted from several ground-based facilities, as well as extracted from TESS full-frame images. We combine radial velocities from the HARPS spectrograph with the photometry in a global analysis to determine the system parameters. Results. NGTS-14Ab has a radius that is about 30 per cent larger than that of Neptune (0.444 ± 0.030 RJup) and is around 70 per cent more massive than Neptune (0.092 ± 0.012 MJup). It transits the main-sequence K1 star, NGTS-14A, with a period of 3.54 days, just far away enough to have maintained at least some of its primordial atmosphere. We have also identified a possible long-period stellar mass companion to the system, NGTS-14B, and we investigate the binarity of exoplanet host stars inside and outside the Neptunian desert using Gaia.",
keywords = "Binaries: general, Planetary systems, Planets and satellites: detection, Planets and satellites: individual: NGTS-14Ab",
author = "Smith, {A. M.S.} and Acton, {J. S.} and Anderson, {D. R.} and Armstrong, {D. J.} and D. Bayliss and C. Belardi and F. Bouchy and R. Brahm and Briegal, {J. T.} and Bryant, {E. M.} and Burleigh, {M. R.} and J. Cabrera and A. Chaushev and Cooke, {B. F.} and Costes, {J. C.} and Sz Csizmadia and Ph Eigm{\"u}ller and A. Erikson and S. Gill and E. Gillen and Goad, {M. R.} and G{\"u}nther, {M. N.} and Henderson, {B. A.} and A. Hogan and A. Jordan and M. Lendl and J. McCormac and M. Moyano and Nielsen, {L. D.} and H. Rauer and L. Raynard and Tilbrook, {R. H.} and O. Turner and S. Udry and Vines, {J. I.} and Watson, {C. A.} and West, {R. G.} and Wheatley, {P. J.}",
note = "Funding Information: Acknowledgements. This work uses data collected under the NGTS project at the ESO La Silla Paranal Observatory. The NGTS facility is operated by the consortium institutes with support from the UK Science and Technology Facilities Council (STFC) under projects ST/M001962/1 and ST/S002642/1. This research made use of Astropy6, a community-developed core Python package for Astronomy (Astropy Collaboration 2013, 2018). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www. cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/ consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This study is based on observations collected at the European Southern Observatory under ESO programmes 0103.C-0719 and 0104.C-0588. We thank the Swiss National Science Foundation (SNSF) and the Geneva University for their continuous support to our planet search programs. This work has been in particular carried out in the frame of the National Centre for Competence in Research PlanetS supported by the Swiss National Science Foundation (SNSF). This publication makes use of The Data & Analysis Center for Exoplanets (DACE), which is a facility based at the University of Geneva (CH) dedicated to extrasolar planets data visualisation, exchange and analysis. DACE is a platform of the Swiss National Centre of Competence in Research (NCCR) PlanetS, federating the Swiss expertise in Exoplanet research. The DACE platform is available at https://dace.unige.ch. M.N.G. acknowledges support from MIT{\textquoteright}s Kavli Institute as a Juan Carlos Torres Fellow. Contributions by authors from the University of Warwick were supported by STFC consolidated grants ST/P000495/1 and ST/T000406/1. D.J.A. acknowledges support from the STFC via an Ernest Rutherford Fellowship (ST/R00384X/1). E.G. gratefully acknowledges support from the David and Claudia Harding Foundation in the form of a Winton Exo-planet Fellowship. Ph.E., A.C., and H.R. acknowledge the support of the DFG priority program SPP 1992 “Exploring the Diversity of Extrasolar Planets” (RA 714/13-1). R.B. acknowledges support from FONDECYT Post-doctoral Fellowship Project 3180246, and from the Millennium Institute of Astrophysics (MAS). Finally, we acknowledge our anonymous referee, whose comments helped to improve the quality of this manuscript. Publisher Copyright: {\textcopyright} ESO 2021.",
year = "2021",
month = feb,
day = "1",
doi = "10.1051/0004-6361/202039712",
language = "English",
volume = "646",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
}