NGTS-14Ab: a Neptune-sized transiting planet in the desert
A. M. S. Smith, J. S. Acton, D. R. Anderson, D. J. Armstrong, D., Bayliss, C. Belardi, F. Bouchy, R. Brahm, J. T. Briegal, E. M. Bryant, M. R., Burleigh, J. Cabrera, A. Chaushev, B. F. Cooke, J. C. Costes, Sz. Csizmadia,, Ph. Eigm\"uller, A. Erikson, S. Gill, E. Gillen

TL;DR
This paper reports the discovery and characterization of NGTS-14Ab, a Neptune-sized planet within the Neptunian desert, using combined photometric and radial velocity data, and discusses its implications for planetary formation.
Contribution
The study presents the first detailed analysis of a Neptune-sized planet in the Neptunian desert, including its system parameters and potential stellar companion, expanding understanding of this planetary population.
Findings
NGTS-14Ab has a radius 30% larger than Neptune.
NGTS-14Ab has a mass 70% greater than Neptune.
The planet orbits a K1 star every 3.54 days.
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 at 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 about 30 per cent larger than that of Neptune (), and is around 70 per cent more massive than Neptune (). It transits the…
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