NGTS-14Ab: a Neptune-sized transiting planet in the desert
| Autor: | Ph. Eigmüller, Edward M. Bryant, Rafael Brahm, Jack S. Acton, Samuel Gill, Aleisha Hogan, Maximiliano Moyano, Andrés Jordán, Monika Lendl, David R. Anderson, Alexander Chaushev, Sz. Csizmadia, Claudia Belardi, Benjamin F. Cooke, Maximilian N. Günther, Oliver Turner, Daniel Bayliss, Richard G. West, James McCormac, David J. Armstrong, Liam Raynard, Matthew R. Burleigh, Alexis M. S. Smith, Christopher A. Watson, Peter J. Wheatley, Anders Erikson, Jose I. Vines, Louise D. Nielsen, Juan Cabrera, François Bouchy, Rosanna H. Tilbrook, Heike Rauer, Edward Gillen, Michael R. Goad, Stéphane Udry, Beth A. Henderson, Joshua T. Briegal, J. Costes |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Extrasolare Planeten und Atmosphären
planets and satellites: detection planets and satellites: individual: NGTS-14Ab 010504 meteorology & atmospheric sciences Stellar mass FOS: Physical sciences Context (language use) 01 natural sciences Neptune Planet 0103 physical sciences Transit (astronomy) 010303 astronomy & astrophysics planetary systems 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Physics Leitungsbereich PF Astronomy Astronomy and Astrophysics Planetary system Exoplanet Photometry (astronomy) binaries: general 13. Climate action Space and Planetary Science astro-ph.EP Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Smith, A M S, Acton, J S, Anderson, D R, Armstrong, D J, Bayliss, D, Belardi, C, Bouchy, F, Brahm, R, Briegal, J T, Bryant, E M, Burleigh, M R, Cabrera, J, Chaushev, A, Cooke, B F, Costes, J C, Csizmadia, S, Eigmüller, P, Erikson, A, Gill, S, Gillen, E, Goad, M R, Günther, M N, Henderson, B A, Hogan, A, Jordán, A, Lendl, M, McCormac, J, Moyano, M, Nielsen, L D, Rauer, H, Raynard, L, Tilbrook, R H, Turner, O, Udry, S, Vines, J I, Watson, C A, West, R G & Wheatley, P J 2021, ' NGTS-14Ab: a Neptune-sized transiting planet in the desert ', Astronomy and Astrophysics, vol. 646, A183 . https://doi.org/10.1051/0004-6361/202039712 |
| Popis: | 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 ($0.444\pm0.030~\mathrm{R_{Jup}}$), and is around 70 per cent more massive than Neptune ($0.092 \pm 0.012~\mathrm{M_{Jup}}$). It transits the main-sequence K1 star, NGTS-14A, with a period of 3.54 days, just far 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. 11 pages, 7 figures. Accepted for publication in A&A |
| Databáze: | OpenAIRE |
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