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. Jordán; 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. Jordán, 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

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

123 Downloads (Pure)

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 (0.444 ± 0.030 R_{Jup}), and is around 70 per cent more massive than Neptune (0.092 ± 0.012 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.

Original language	English
Article number	A183
Number of pages	11
Journal	Astronomy and Astrophysics
Volume	646
DOIs	https://doi.org/10.1051/0004-6361/202039712
Publication status	Published - 26 Feb 2021

Keywords

astro-ph.EP

Access to Document

10.1051/0004-6361/202039712Licence: Unspecified

NGTS-14Ab: a Neptune-sized transiting planet in the desert
Copyright 2021, EDP Sciences. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 726 KBLicence: Unspecified

Cite this

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{7bcdbc3378a24254b42d3463983b931e,

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 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 ± 0.030 R_{Jup}), and is around 70 per cent more massive than Neptune (0.092 ± 0.012 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. ",

keywords = "astro-ph.EP",

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. Jord{\'a}n 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.}",

year = "2021",

month = feb,

day = "26",

doi = "10.1051/0004-6361/202039712",

language = "English",

volume = "646",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

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, Jordán, 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: 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 - Jordán, 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 - 2021/2/26

Y1 - 2021/2/26

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 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 ± 0.030 R_{Jup}), and is around 70 per cent more massive than Neptune (0.092 ± 0.012 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.

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 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 ± 0.030 R_{Jup}), and is around 70 per cent more massive than Neptune (0.092 ± 0.012 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.

KW - astro-ph.EP

U2 - 10.1051/0004-6361/202039712

DO - 10.1051/0004-6361/202039712

M3 - Article

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

Access to Document

Fingerprint

Cite this