The TOI-763 system: sub-Neptunes orbiting a Sun-like star

M. Fridlund; J. Livingston; D. Gandolfi; C. M. Persson; K. W.F. Lam; K. G. Stassun; C. Hellier; J. Korth; A. P. Hatzes; L. Malavolta; R. Luque; S. Redfield; E. W. Guenther; S. Albrecht; O. Barragan; S. Benatti; L. Bouma; J. Cabrera; W. D. Cochran; S. Csizmadia; F. Dai; H. J. Deeg; M. Esposito; I. Georgieva; S. Grziwa; L. González Cuesta; T. Hirano; J. M. Jenkins; P. Kabath; E. Knudstrup; D. W. Latham; S. Mathur; S. E. Mullally; N. Narita; G. Nowak; A. O.H. Olofsson; E. Palle; M. Pätzold; E. Pompei; H. Rauer; G. Ricker; F. Rodler; S. Seager; L. M. Serrano; A. M.S. Smith; L. Spina; J. Subjak; P. Tenenbaum; E. B. Ting; A. Vanderburg; R. Vanderspek; V. Van Eylen; S. Villanueva; J. N. Winn

doi:10.1093/mnras/staa2502

The TOI-763 system: sub-Neptunes orbiting a Sun-like star

M. Fridlund^*, J. Livingston, D. Gandolfi, C. M. Persson, K. W.F. Lam, K. G. Stassun, C. Hellier, J. Korth, A. P. Hatzes, L. Malavolta, R. Luque, S. Redfield, E. W. Guenther, S. Albrecht, O. Barragan, S. Benatti, L. Bouma, J. Cabrera, W. D. Cochran, S. CsizmadiaF. Dai, H. J. Deeg, M. Esposito, I. Georgieva, S. Grziwa, L. González Cuesta, T. Hirano, J. M. Jenkins, P. Kabath, E. Knudstrup, D. W. Latham, S. Mathur, S. E. Mullally, N. Narita, G. Nowak, A. O.H. Olofsson, E. Palle, M. Pätzold, E. Pompei, H. Rauer, G. Ricker, F. Rodler, S. Seager, L. M. Serrano, A. M.S. Smith, L. Spina, J. Subjak, P. Tenenbaum, E. B. Ting, A. Vanderburg, R. Vanderspek, V. Van Eylen, S. Villanueva, J. N. Winn

^*Corresponding author af dette arbejde

Institut for Fysik og Astronomi - Stellar Astrophysics Centre

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Abstract

We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

Originalsprog	Engelsk
Tidsskrift	Monthly Notices of the Royal Astronomical Society
Vol/bind	498
Nummer	3
Sider (fra-til)	4503-4517
Antal sider	15
ISSN	0035-8711
DOI	https://doi.org/10.1093/mnras/staa2502
Status	Udgivet - nov. 2020

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10.1093/mnras/staa2502

https://arxiv.org/pdf/2008.12535.pdf

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http://www.scopus.com/inward/record.url?scp=85096944457&partnerID=8YFLogxK

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Fridlund, M., Livingston, J., Gandolfi, D., Persson, C. M., Lam, K. W. F., Stassun, K. G., Hellier, C., Korth, J., Hatzes, A. P., Malavolta, L., Luque, R., Redfield, S., Guenther, E. W., Albrecht, S., Barragan, O., Benatti, S., Bouma, L., Cabrera, J., Cochran, W. D., ... Winn, J. N. (2020). The TOI-763 system: sub-Neptunes orbiting a Sun-like star. Monthly Notices of the Royal Astronomical Society, 498(3), 4503-4517. https://doi.org/10.1093/mnras/staa2502

@article{9154868bd5ee470092e7e3bfaf425751,

title = "The TOI-763 system: sub-Neptunes orbiting a Sun-like star",

abstract = "We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.",

keywords = "planets and satellites: detection, planets and satellites: individual: TIC 178819686, planets and satellites: individual: TOI-763",

author = "M. Fridlund and J. Livingston and D. Gandolfi and Persson, {C. M.} and Lam, {K. W.F.} and Stassun, {K. G.} and C. Hellier and J. Korth and Hatzes, {A. P.} and L. Malavolta and R. Luque and S. Redfield and Guenther, {E. W.} and S. Albrecht and O. Barragan and S. Benatti and L. Bouma and J. Cabrera and Cochran, {W. D.} and S. Csizmadia and F. Dai and Deeg, {H. J.} and M. Esposito and I. Georgieva and S. Grziwa and {Gonz{\'a}lez Cuesta}, L. and T. Hirano and Jenkins, {J. M.} and P. Kabath and E. Knudstrup and Latham, {D. W.} and S. Mathur and Mullally, {S. E.} and N. Narita and G. Nowak and Olofsson, {A. O.H.} and E. Palle and M. P{\"a}tzold and E. Pompei and H. Rauer and G. Ricker and F. Rodler and S. Seager and Serrano, {L. M.} and Smith, {A. M.S.} and L. Spina and J. Subjak and P. Tenenbaum and Ting, {E. B.} and A. Vanderburg and R. Vanderspek and {Van Eylen}, V. and S. Villanueva and Winn, {J. N.}",

year = "2020",

month = nov,

doi = "10.1093/mnras/staa2502",

language = "English",

volume = "498",

pages = "4503--4517",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Fridlund, M, Livingston, J, Gandolfi, D, Persson, CM, Lam, KWF, Stassun, KG, Hellier, C, Korth, J, Hatzes, AP, Malavolta, L, Luque, R, Redfield, S, Guenther, EW, Albrecht, S, Barragan, O, Benatti, S, Bouma, L, Cabrera, J, Cochran, WD, Csizmadia, S, Dai, F, Deeg, HJ, Esposito, M, Georgieva, I, Grziwa, S, González Cuesta, L, Hirano, T, Jenkins, JM, Kabath, P, Knudstrup, E, Latham, DW, Mathur, S, Mullally, SE, Narita, N, Nowak, G, Olofsson, AOH, Palle, E, Pätzold, M, Pompei, E, Rauer, H, Ricker, G, Rodler, F, Seager, S, Serrano, LM, Smith, AMS, Spina, L, Subjak, J, Tenenbaum, P, Ting, EB, Vanderburg, A, Vanderspek, R, Van Eylen, V, Villanueva, S & Winn, JN 2020, 'The TOI-763 system: sub-Neptunes orbiting a Sun-like star', Monthly Notices of the Royal Astronomical Society, bind 498, nr. 3, s. 4503-4517. https://doi.org/10.1093/mnras/staa2502

TY - JOUR

T1 - The TOI-763 system

T2 - sub-Neptunes orbiting a Sun-like star

AU - Fridlund, M.

AU - Livingston, J.

AU - Gandolfi, D.

AU - Persson, C. M.

AU - Lam, K. W.F.

AU - Stassun, K. G.

AU - Hellier, C.

AU - Korth, J.

AU - Hatzes, A. P.

AU - Malavolta, L.

AU - Luque, R.

AU - Redfield, S.

AU - Guenther, E. W.

AU - Albrecht, S.

AU - Barragan, O.

AU - Benatti, S.

AU - Bouma, L.

AU - Cabrera, J.

AU - Cochran, W. D.

AU - Csizmadia, S.

AU - Dai, F.

AU - Deeg, H. J.

AU - Esposito, M.

AU - Georgieva, I.

AU - Grziwa, S.

AU - González Cuesta, L.

AU - Hirano, T.

AU - Jenkins, J. M.

AU - Kabath, P.

AU - Knudstrup, E.

AU - Latham, D. W.

AU - Mathur, S.

AU - Mullally, S. E.

AU - Narita, N.

AU - Nowak, G.

AU - Olofsson, A. O.H.

AU - Palle, E.

AU - Pätzold, M.

AU - Pompei, E.

AU - Rauer, H.

AU - Ricker, G.

AU - Rodler, F.

AU - Seager, S.

AU - Serrano, L. M.

AU - Smith, A. M.S.

AU - Spina, L.

AU - Subjak, J.

AU - Tenenbaum, P.

AU - Ting, E. B.

AU - Vanderburg, A.

AU - Vanderspek, R.

AU - Van Eylen, V.

AU - Villanueva, S.

AU - Winn, J. N.

PY - 2020/11

Y1 - 2020/11

N2 - We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

AB - We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

KW - planets and satellites: detection

KW - planets and satellites: individual: TIC 178819686

KW - planets and satellites: individual: TOI-763

UR - http://www.scopus.com/inward/record.url?scp=85096944457&partnerID=8YFLogxK

U2 - 10.1093/mnras/staa2502

DO - 10.1093/mnras/staa2502

M3 - Journal article

AN - SCOPUS:85096944457

SN - 0035-8711

VL - 498

SP - 4503

EP - 4517

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The TOI-763 system: sub-Neptunes orbiting a Sun-like star

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