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 Eigmüller; A. Erikson; S. Gill; E. Gillen; M. R. Goad; M. N. Günther; B. A. Henderson; A. Hogan; A. Jordan; M. Lendl; J. McCormac; M. Moyano; L. D. Nielsen; H. Rauer; L. Raynard; R. H. Tilbrook; O. Turner; S. Udry; J. I. Vines; C. A. Watson; R. G. West; P. J. Wheatley

doi:10.1051/0004-6361/202039712

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 Eigmüller, A. Erikson, S. Gill, E. GillenM. R. Goad, M. N. Günther, B. A. Henderson, A. Hogan, A. Jordan, M. Lendl, J. McCormac, M. Moyano, L. D. Nielsen, H. Rauer, L. Raynard, R. H. Tilbrook, O. Turner, S. Udry, J. I. Vines, C. A. Watson, R. G. West, P. J. Wheatley

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13 Scopus citations

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.

Original language	English
Article number	A183
Journal	Astronomy and Astrophysics
Volume	646
DOIs	https://doi.org/10.1051/0004-6361/202039712
State	Published - 1 Feb 2021
Externally published	Yes

Keywords

Binaries: general
Planetary systems
Planets and satellites: detection
Planets and satellites: individual: NGTS-14Ab

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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., ... Wheatley, P. J. (2021). NGTS-14Ab: A Neptune-sized transiting planet in the desert. Astronomy and Astrophysics, 646, Article A183. https://doi.org/10.1051/0004-6361/202039712

@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 = "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",

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Smith, AMS, Acton, JS, Anderson, DR, Armstrong, DJ, Bayliss, D, Belardi, C, Bouchy, F, Brahm, R, Briegal, JT, Bryant, EM, Burleigh, MR, Cabrera, J, Chaushev, A, Cooke, BF, Costes, JC, Csizmadia, S, Eigmüller, P, Erikson, A, Gill, S, Gillen, E, Goad, MR, Günther, MN, Henderson, BA, Hogan, A, Jordan, A, Lendl, M, McCormac, J, Moyano, M, Nielsen, LD, Rauer, H, Raynard, L, Tilbrook, RH, Turner, O, Udry, S, Vines, JI, Watson, CA, West, RG & Wheatley, PJ 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

TY - JOUR

T1 - NGTS-14Ab

T2 - A Neptune-sized transiting planet in the desert

AU - Smith, A. M.S.

AU - Acton, J. S.

AU - Anderson, D. R.

AU - Armstrong, D. J.

AU - Bayliss, D.

AU - Belardi, C.

AU - Bouchy, F.

AU - Brahm, R.

AU - Briegal, J. T.

AU - Bryant, E. M.

AU - Burleigh, M. R.

AU - Cabrera, J.

AU - Chaushev, A.

AU - Cooke, B. F.

AU - Costes, J. C.

AU - Csizmadia, Sz

AU - Eigmüller, Ph

AU - Erikson, A.

AU - Gill, S.

AU - Gillen, E.

AU - Goad, M. R.

AU - Günther, M. N.

AU - Henderson, B. A.

AU - Hogan, A.

AU - Jordan, A.

AU - Lendl, M.

AU - McCormac, J.

AU - Moyano, M.

AU - Nielsen, L. D.

AU - Rauer, H.

AU - Raynard, L.

AU - Tilbrook, R. H.

AU - Turner, O.

AU - Udry, S.

AU - Vines, J. I.

AU - Watson, C. A.

AU - West, R. G.

AU - Wheatley, P. J.

PY - 2021/2/1

Y1 - 2021/2/1

N2 - 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.

AB - 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.

KW - Binaries: general

KW - Planetary systems

KW - Planets and satellites: detection

KW - Planets and satellites: individual: NGTS-14Ab

UR - http://www.scopus.com/inward/record.url?scp=85101751620&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202039712

DO - 10.1051/0004-6361/202039712

M3 - Article

AN - SCOPUS:85101751620

SN - 0004-6361

VL - 646

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A183

ER -

NGTS-14Ab: A Neptune-sized transiting planet in the desert

Abstract

Keywords

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