NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

Edward M. Bryant; Daniel Bayliss; Louise D. Nielsen; Dimitri Veras; Jack S. Acton; David R. Anderson; David J. Armstrong; François Bouchy; Joshua T. Briegal; Matthew R. Burleigh; Juan Cabrera; Sarah L. Casewell; Alexander Chaushev; Benjamin F. Cooke; Szilárd Csizmadia; Philipp Eigmüller; Anders Erikson; Samuel Gill; Edward Gillen; Michael R. Goad; Nolan Grieves; Maximilian N. Günther; Beth Henderson; Aleisha Hogan; James S. Jenkins; Monika Lendl; James McCormac; Maximiliano Moyano; Didier Queloz; Heike Rauer; Liam Raynard; Alexis M. S. Smith; Rosanna H. Tilbrook; Stéphane Udry; Jose I. Vines; Christopher A. Watson; Richard G. West; Peter J. Wheatley

doi:10.1093/mnras/staa2976

NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

Edward M. Bryant, Daniel Bayliss, Louise D. Nielsen, Dimitri Veras, Jack S. Acton, David R. Anderson, David J. Armstrong, François Bouchy, Joshua T. Briegal, Matthew R. Burleigh, Juan Cabrera, Sarah L. Casewell, Alexander Chaushev, Benjamin F. Cooke, Szilárd Csizmadia, Philipp Eigmüller, Anders Erikson, Samuel Gill, Edward Gillen, Michael R. GoadNolan Grieves, Maximilian N. Günther, Beth Henderson, Aleisha Hogan, James S. Jenkins, Monika Lendl, James McCormac, Maximiliano Moyano, Didier Queloz, Heike Rauer, Liam Raynard, Alexis M. S. Smith, Rosanna H. Tilbrook, Stéphane Udry, Jose I. Vines, Christopher A. Watson, Richard G. West, Peter J. Wheatley

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Abstract

We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38mag star with an effective temperature of Teff = 5690± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the Transiting Exoplanet Survey Satellite (TESS) full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm-3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.

Original language	English
Pages (from-to)	3139-3148
Journal	Monthly Notices of the Royal Astronomical Society
Volume	499
Issue number	3
DOIs	https://doi.org/10.1093/mnras/staa2976
Publication status	Published - 28 Sept 2020
Externally published	Yes

Keywords

techniques: photometric
stars: individual: NGTS-12
planetary systems
planets and satellites: detection

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NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit
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Bryant, E. M., Bayliss, D., Nielsen, L. D., Veras, D., Acton, J. S., Anderson, D. R., Armstrong, D. J., Bouchy, F., Briegal, J. T., Burleigh, M. R., Cabrera, J., Casewell, S. L., Chaushev, A., Cooke, B. F., Csizmadia, S., Eigmüller, P., Erikson, A., Gill, S., Gillen, E., ... Wheatley, P. J. (2020). NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit. Monthly Notices of the Royal Astronomical Society, 499(3), 3139-3148. https://doi.org/10.1093/mnras/staa2976

@article{910cd8a07dea45fba990b60471673373,

title = "NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit",

abstract = "We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38mag star with an effective temperature of Teff = 5690± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the Transiting Exoplanet Survey Satellite (TESS) full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm-3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.",

keywords = "techniques: photometric, stars: individual: NGTS-12, planetary systems, planets and satellites: detection",

author = "Bryant, {Edward M.} and Daniel Bayliss and Nielsen, {Louise D.} and Dimitri Veras and Acton, {Jack S.} and Anderson, {David R.} and Armstrong, {David J.} and Fran{\c c}ois Bouchy and Briegal, {Joshua T.} and Burleigh, {Matthew R.} and Juan Cabrera and Casewell, {Sarah L.} and Alexander Chaushev and Cooke, {Benjamin F.} and Szil{\'a}rd Csizmadia and Philipp Eigm{\"u}ller and Anders Erikson and Samuel Gill and Edward Gillen and Goad, {Michael R.} and Nolan Grieves and G{\"u}nther, {Maximilian N.} and Beth Henderson and Aleisha Hogan and Jenkins, {James S.} and Monika Lendl and James McCormac and Maximiliano Moyano and Didier Queloz and Heike Rauer and Liam Raynard and Smith, {Alexis M. S.} and Tilbrook, {Rosanna H.} and St{\'e}phane Udry and Vines, {Jose I.} and Watson, {Christopher A.} and West, {Richard G.} and Wheatley, {Peter J.}",

year = "2020",

month = sep,

day = "28",

doi = "10.1093/mnras/staa2976",

language = "English",

volume = "499",

pages = "3139--3148",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Bryant, EM, Bayliss, D, Nielsen, LD, Veras, D, Acton, JS, Anderson, DR, Armstrong, DJ, Bouchy, F, Briegal, JT, Burleigh, MR, Cabrera, J, Casewell, SL, Chaushev, A, Cooke, BF, Csizmadia, S, Eigmüller, P, Erikson, A, Gill, S, Gillen, E, Goad, MR, Grieves, N, Günther, MN, Henderson, B, Hogan, A, Jenkins, JS, Lendl, M, McCormac, J, Moyano, M, Queloz, D, Rauer, H, Raynard, L, Smith, AMS, Tilbrook, RH, Udry, S, Vines, JI, Watson, CA, West, RG & Wheatley, PJ 2020, 'NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit', Monthly Notices of the Royal Astronomical Society, vol. 499, no. 3, pp. 3139-3148. https://doi.org/10.1093/mnras/staa2976

TY - JOUR

T1 - NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

AU - Bryant, Edward M.

AU - Bayliss, Daniel

AU - Nielsen, Louise D.

AU - Veras, Dimitri

AU - Acton, Jack S.

AU - Anderson, David R.

AU - Armstrong, David J.

AU - Bouchy, François

AU - Briegal, Joshua T.

AU - Burleigh, Matthew R.

AU - Cabrera, Juan

AU - Casewell, Sarah L.

AU - Chaushev, Alexander

AU - Cooke, Benjamin F.

AU - Csizmadia, Szilárd

AU - Eigmüller, Philipp

AU - Erikson, Anders

AU - Gill, Samuel

AU - Gillen, Edward

AU - Goad, Michael R.

AU - Grieves, Nolan

AU - Günther, Maximilian N.

AU - Henderson, Beth

AU - Hogan, Aleisha

AU - Jenkins, James S.

AU - Lendl, Monika

AU - McCormac, James

AU - Moyano, Maximiliano

AU - Queloz, Didier

AU - Rauer, Heike

AU - Raynard, Liam

AU - Smith, Alexis M. S.

AU - Tilbrook, Rosanna H.

AU - Udry, Stéphane

AU - Vines, Jose I.

AU - Watson, Christopher A.

AU - West, Richard G.

AU - Wheatley, Peter J.

PY - 2020/9/28

Y1 - 2020/9/28

N2 - We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38mag star with an effective temperature of Teff = 5690± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the Transiting Exoplanet Survey Satellite (TESS) full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm-3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.

AB - We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38mag star with an effective temperature of Teff = 5690± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the Transiting Exoplanet Survey Satellite (TESS) full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm-3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.

KW - techniques: photometric

KW - stars: individual: NGTS-12

KW - planetary systems

KW - planets and satellites: detection

U2 - 10.1093/mnras/staa2976

DO - 10.1093/mnras/staa2976

M3 - Article

SN - 0035-8711

VL - 499

SP - 3139

EP - 3148

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

Abstract

Keywords

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