NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event

Samuel Gill; Peter J. Wheatley; Benjamin F. Cooke; Andrés Jordán; Louise D. Nielsen; Daniel Bayliss; David R. Anderson; Jose I. Vines; Monika Lendl; Jack S. Acton; David J. Armstrong; Francois Bouchy; Rafael Brahm; Edward M. Bryant; Matthew R. Burleigh; Sarah L. Casewell; Philipp Eigmüller; Néstor Espinoza; Edward Gillen; Michael R. Goad; Nolan Grieves; Maximilian N. Günther; Thomas Henning; Melissa J. Hobson; Aleisha Hogan; James S. Jenkins; James McCormac; Maximiliano Moyano; Hugh P. Osborn; Don Pollacco; Didier Queloz; Heike Rauer; Liam Raynard; Felipe Rojas; Paula Sarkis; Alexis M.S. Smith; Marcelo Tala Pinto; Rosanna H. Tilbrook; Stéphane Udry; Christopher A. Watson; Richard G. West

doi:10.3847/2041-8213/ab9eb9

NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event

Samuel Gill, Peter J. Wheatley, Benjamin F. Cooke, Andrés Jordán, Louise D. Nielsen, Daniel Bayliss, David R. Anderson, Jose I. Vines, Monika Lendl, Jack S. Acton, David J. Armstrong, Francois Bouchy, Rafael Brahm, Edward M. Bryant, Matthew R. Burleigh, Sarah L. Casewell, Philipp Eigmüller, Néstor Espinoza, Edward Gillen, Michael R. GoadNolan Grieves, Maximilian N. Günther, Thomas Henning, Melissa J. Hobson, Aleisha Hogan, James S. Jenkins, James McCormac, Maximiliano Moyano, Hugh P. Osborn, Don Pollacco, Didier Queloz, Heike Rauer, Liam Raynard, Felipe Rojas, Paula Sarkis, Alexis M.S. Smith, Marcelo Tala Pinto, Rosanna H. Tilbrook, Stéphane Udry, Christopher A. Watson, Richard G. West

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34 Scopus citations

Abstract

We report the discovery of NGTS-11 b (=TOI-1847b), a transiting Saturn in a 35.46 day orbit around a mid K-type star (= 5050 80 K). We initially identified the system from a single-transit event in a TESS full-frame image light curve. Following 79 nights of photometric monitoring with an NGTS telescope, we observed a second full transit of NGTS-11 b approximately one year after the TESS single-transit event. The NGTS transit confirmed the parameters of the transit signal and restricted the orbital period to a set of 13 discrete periods. We combined our transit detections with precise radial-velocity measurements to determine the true orbital period and measure the mass of the planet. We find NGTS-11 b has a radius of K, making it one of the coolest known transiting gas giants. NGTS-11 b is the first exoplanet to be discovered after being initially identified as a TESS single-transit event, and its discovery highlights the power of intense photometric monitoring in recovering longer-period transiting exoplanets from single-transit events.

Original language	English
Article number	L11
Journal	Astrophysical Journal Letters
Volume	898
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab9eb9
State	Published - 20 Jul 2020
Externally published	Yes

Keywords

Exoplanet astronomy (486)
Exoplanet detection methods (489)
Exoplanets (498)
Extrasolar gas giants (509)
High resolution spectroscopy (2096)
Photometry (1234)

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Gill, S., Wheatley, P. J., Cooke, B. F., Jordán, A., Nielsen, L. D., Bayliss, D., Anderson, D. R., Vines, J. I., Lendl, M., Acton, J. S., Armstrong, D. J., Bouchy, F., Brahm, R., Bryant, E. M., Burleigh, M. R., Casewell, S. L., Eigmüller, P., Espinoza, N., Gillen, E., ... West, R. G. (2020). NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event. Astrophysical Journal Letters, 898(1), Article L11. https://doi.org/10.3847/2041-8213/ab9eb9

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title = "NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event",

abstract = "We report the discovery of NGTS-11 b (=TOI-1847b), a transiting Saturn in a 35.46 day orbit around a mid K-type star (= 5050 80 K). We initially identified the system from a single-transit event in a TESS full-frame image light curve. Following 79 nights of photometric monitoring with an NGTS telescope, we observed a second full transit of NGTS-11 b approximately one year after the TESS single-transit event. The NGTS transit confirmed the parameters of the transit signal and restricted the orbital period to a set of 13 discrete periods. We combined our transit detections with precise radial-velocity measurements to determine the true orbital period and measure the mass of the planet. We find NGTS-11 b has a radius of K, making it one of the coolest known transiting gas giants. NGTS-11 b is the first exoplanet to be discovered after being initially identified as a TESS single-transit event, and its discovery highlights the power of intense photometric monitoring in recovering longer-period transiting exoplanets from single-transit events.",

keywords = "Exoplanet astronomy (486), Exoplanet detection methods (489), Exoplanets (498), Extrasolar gas giants (509), High resolution spectroscopy (2096), Photometry (1234)",

author = "Samuel Gill and Wheatley, {Peter J.} and Cooke, {Benjamin F.} and Andr{\'e}s Jord{\'a}n and Nielsen, {Louise D.} and Daniel Bayliss and Anderson, {David R.} and Vines, {Jose I.} and Monika Lendl and Acton, {Jack S.} and Armstrong, {David J.} and Francois Bouchy and Rafael Brahm and Bryant, {Edward M.} and Burleigh, {Matthew R.} and Casewell, {Sarah L.} and Philipp Eigm{\"u}ller and N{\'e}stor Espinoza and Edward Gillen and {R. Goad}, Michael and Nolan Grieves and G{\"u}nther, {Maximilian N.} and Thomas Henning and Hobson, {Melissa J.} and Aleisha Hogan and Jenkins, {James S.} and James McCormac and Maximiliano Moyano and Osborn, {Hugh P.} and Don Pollacco and Didier Queloz and Heike Rauer and Liam Raynard and Felipe Rojas and Paula Sarkis and Smith, {Alexis M.S.} and Pinto, {Marcelo Tala} and Tilbrook, {Rosanna H.} and St{\'e}phane Udry and Watson, {Christopher A.} and West, {Richard G.}",

note = "Publisher Copyright: {\textcopyright} 2020. The Author(s). Published by the American Astronomical Society..",

year = "2020",

month = jul,

day = "20",

doi = "10.3847/2041-8213/ab9eb9",

language = "English",

volume = "898",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

Gill, S, Wheatley, PJ, Cooke, BF, Jordán, A, Nielsen, LD, Bayliss, D, Anderson, DR, Vines, JI, Lendl, M, Acton, JS, Armstrong, DJ, Bouchy, F, Brahm, R, Bryant, EM, Burleigh, MR, Casewell, SL, Eigmüller, P, Espinoza, N, Gillen, E, R. Goad, M, Grieves, N, Günther, MN, Henning, T, Hobson, MJ, Hogan, A, Jenkins, JS, McCormac, J, Moyano, M, Osborn, HP, Pollacco, D, Queloz, D, Rauer, H, Raynard, L, Rojas, F, Sarkis, P, Smith, AMS, Pinto, MT, Tilbrook, RH, Udry, S, Watson, CA & West, RG 2020, 'NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event', Astrophysical Journal Letters, vol. 898, no. 1, L11. https://doi.org/10.3847/2041-8213/ab9eb9

TY - JOUR

T1 - NGTS-11 b (TOI-1847 b)

T2 - A Transiting Warm Saturn Recovered from a TESS Single-transit Event

AU - Gill, Samuel

AU - Wheatley, Peter J.

AU - Cooke, Benjamin F.

AU - Jordán, Andrés

AU - Nielsen, Louise D.

AU - Bayliss, Daniel

AU - Anderson, David R.

AU - Vines, Jose I.

AU - Lendl, Monika

AU - Acton, Jack S.

AU - Armstrong, David J.

AU - Bouchy, Francois

AU - Brahm, Rafael

AU - Bryant, Edward M.

AU - Burleigh, Matthew R.

AU - Casewell, Sarah L.

AU - Eigmüller, Philipp

AU - Espinoza, Néstor

AU - Gillen, Edward

AU - R. Goad, Michael

AU - Grieves, Nolan

AU - Günther, Maximilian N.

AU - Henning, Thomas

AU - Hobson, Melissa J.

AU - Hogan, Aleisha

AU - Jenkins, James S.

AU - McCormac, James

AU - Moyano, Maximiliano

AU - Osborn, Hugh P.

AU - Pollacco, Don

AU - Queloz, Didier

AU - Rauer, Heike

AU - Raynard, Liam

AU - Rojas, Felipe

AU - Sarkis, Paula

AU - Smith, Alexis M.S.

AU - Pinto, Marcelo Tala

AU - Tilbrook, Rosanna H.

AU - Udry, Stéphane

AU - Watson, Christopher A.

AU - West, Richard G.

PY - 2020/7/20

Y1 - 2020/7/20

N2 - We report the discovery of NGTS-11 b (=TOI-1847b), a transiting Saturn in a 35.46 day orbit around a mid K-type star (= 5050 80 K). We initially identified the system from a single-transit event in a TESS full-frame image light curve. Following 79 nights of photometric monitoring with an NGTS telescope, we observed a second full transit of NGTS-11 b approximately one year after the TESS single-transit event. The NGTS transit confirmed the parameters of the transit signal and restricted the orbital period to a set of 13 discrete periods. We combined our transit detections with precise radial-velocity measurements to determine the true orbital period and measure the mass of the planet. We find NGTS-11 b has a radius of K, making it one of the coolest known transiting gas giants. NGTS-11 b is the first exoplanet to be discovered after being initially identified as a TESS single-transit event, and its discovery highlights the power of intense photometric monitoring in recovering longer-period transiting exoplanets from single-transit events.

AB - We report the discovery of NGTS-11 b (=TOI-1847b), a transiting Saturn in a 35.46 day orbit around a mid K-type star (= 5050 80 K). We initially identified the system from a single-transit event in a TESS full-frame image light curve. Following 79 nights of photometric monitoring with an NGTS telescope, we observed a second full transit of NGTS-11 b approximately one year after the TESS single-transit event. The NGTS transit confirmed the parameters of the transit signal and restricted the orbital period to a set of 13 discrete periods. We combined our transit detections with precise radial-velocity measurements to determine the true orbital period and measure the mass of the planet. We find NGTS-11 b has a radius of K, making it one of the coolest known transiting gas giants. NGTS-11 b is the first exoplanet to be discovered after being initially identified as a TESS single-transit event, and its discovery highlights the power of intense photometric monitoring in recovering longer-period transiting exoplanets from single-transit events.

KW - Exoplanet astronomy (486)

KW - Exoplanet detection methods (489)

KW - Exoplanets (498)

KW - Extrasolar gas giants (509)

KW - High resolution spectroscopy (2096)

KW - Photometry (1234)

UR - http://www.scopus.com/inward/record.url?scp=85090391745&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/ab9eb9

DO - 10.3847/2041-8213/ab9eb9

M3 - Article

AN - SCOPUS:85090391745

SN - 2041-8205

VL - 898

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L11

ER -

NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event

Abstract

Keywords

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