TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star

Iskra Y. Georgieva; Carina M. Persson; Elisa Goffo; Lorena Acuña; Artyom Aguichine; Luisa M. Serrano; Kristine W.F. Lam; Davide Gandolfi; Karen A. Collins; Steven B. Howell; Fei Dai; Malcolm Fridlund; Judith Korth; Magali Deleuil; Oscar Barragán; William D. Cochran; Szilárd Csizmadia; Hans J. Deeg; Eike Guenther; Artie P. Hatzes; Jon M. Jenkins; John Livingston; Rafael Luque; Olivier Mousis; Hannah L.M. Osborne; Enric Palle; Seth Redfield; Vincent Van Eylen; Joseph D. Twicken; Joshua N. Winn; Ahlam Alqasim; Kevin I. Collins; Crystal L. Gnilka; David W. Latham; Hannah M. Lewis; Howard M. Relles; George R. Ricker; Pamela Rowden; Sara Seager; Avi Shporer; Thiam Guan Tan; Andrew Vanderburg; Roland Vanderspek

doi:10.1051/0004-6361/202345961

TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star

Iskra Y. Georgieva, Carina M. Persson, Elisa Goffo, Lorena Acuña, Artyom Aguichine, Luisa M. Serrano, Kristine W.F. Lam, Davide Gandolfi, Karen A. Collins, Steven B. Howell, Fei Dai, Malcolm Fridlund, Judith Korth, Magali Deleuil, Oscar Barragán, William D. Cochran, Szilárd Csizmadia, Hans J. Deeg, Eike Guenther, Artie P. HatzesJon M. Jenkins, John Livingston, Rafael Luque, Olivier Mousis, Hannah L.M. Osborne, Enric Palle, Seth Redfield, Vincent Van Eylen, Joseph D. Twicken, Joshua N. Winn, Ahlam Alqasim, Kevin I. Collins, Crystal L. Gnilka, David W. Latham, Hannah M. Lewis, Howard M. Relles, George R. Ricker, Pamela Rowden, Sara Seager, Avi Shporer, Thiam Guan Tan, Andrew Vanderburg, Roland Vanderspek

Astrophysical Sciences

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

Abstract

We report the discovery of a hot (Teq ≈ 1055 K) planet in the small-planet radius valley that transits the Sun-like star TOI-733. It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of {equation presented} days and a radius of {equation presented}. Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K = 2.23 ± 0.26 m s-1, translating into a planet mass of {equation presented}. These parameters imply that the planet is of moderate density ({equation presented}) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram. Combining these with stellar parameters and abundances, we calculated planet interior and atmosphere models, which in turn suggest that TOI-733 b has a volatile-enriched, most likely secondary outer envelope, and may represent a highly irradiated ocean world. This is one of only a few such planets around G-type stars that are well characterised.

Original language	English (US)
Article number	A117
Journal	Astronomy and Astrophysics
Volume	674
DOIs	https://doi.org/10.1051/0004-6361/202345961
State	Published - Jun 1 2023

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planets and satellites: composition
Planets and satellites: detection
Planets and satellites: individual: TOI-733
Techniques: photometric
Techniques: radial velocities

Access to Document

10.1051/0004-6361/202345961

Cite this

Georgieva, I. Y., Persson, C. M., Goffo, E., Acuña, L., Aguichine, A., Serrano, L. M., Lam, K. W. F., Gandolfi, D., Collins, K. A., Howell, S. B., Dai, F., Fridlund, M., Korth, J., Deleuil, M., Barragán, O., Cochran, W. D., Csizmadia, S., Deeg, H. J., Guenther, E., ... Vanderspek, R. (2023). TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star. Astronomy and Astrophysics, 674, Article A117. https://doi.org/10.1051/0004-6361/202345961

@article{ba1180d8de8c402aacf1c21ec78f131b,

title = "TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star",

abstract = "We report the discovery of a hot (Teq ≈ 1055 K) planet in the small-planet radius valley that transits the Sun-like star TOI-733. It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of {equation presented} days and a radius of {equation presented}. Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K = 2.23 ± 0.26 m s-1, translating into a planet mass of {equation presented}. These parameters imply that the planet is of moderate density ({equation presented}) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram. Combining these with stellar parameters and abundances, we calculated planet interior and atmosphere models, which in turn suggest that TOI-733 b has a volatile-enriched, most likely secondary outer envelope, and may represent a highly irradiated ocean world. This is one of only a few such planets around G-type stars that are well characterised.",

keywords = "Planets and satellites: composition, Planets and satellites: detection, Planets and satellites: individual: TOI-733, Techniques: photometric, Techniques: radial velocities",

author = "Georgieva, {Iskra Y.} and Persson, {Carina M.} and Elisa Goffo and Lorena Acu{\~n}a and Artyom Aguichine and Serrano, {Luisa M.} and Lam, {Kristine W.F.} and Davide Gandolfi and Collins, {Karen A.} and Howell, {Steven B.} and Fei Dai and Malcolm Fridlund and Judith Korth and Magali Deleuil and Oscar Barrag{\'a}n and Cochran, {William D.} and Szil{\'a}rd Csizmadia and Deeg, {Hans J.} and Eike Guenther and Hatzes, {Artie P.} and Jenkins, {Jon M.} and John Livingston and Rafael Luque and Olivier Mousis and Osborne, {Hannah L.M.} and Enric Palle and Seth Redfield and {Van Eylen}, Vincent and Twicken, {Joseph D.} and Winn, {Joshua N.} and Ahlam Alqasim and Collins, {Kevin I.} and Gnilka, {Crystal L.} and Latham, {David W.} and Lewis, {Hannah M.} and Relles, {Howard M.} and Ricker, {George R.} and Pamela Rowden and Sara Seager and Avi Shporer and Tan, {Thiam Guan} and Andrew Vanderburg and Roland Vanderspek",

note = "Publisher Copyright: {\textcopyright} The Authors 2023.",

year = "2023",

month = jun,

day = "1",

doi = "10.1051/0004-6361/202345961",

language = "English (US)",

volume = "674",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Georgieva, IY, Persson, CM, Goffo, E, Acuña, L, Aguichine, A, Serrano, LM, Lam, KWF, Gandolfi, D, Collins, KA, Howell, SB, Dai, F, Fridlund, M, Korth, J, Deleuil, M, Barragán, O, Cochran, WD, Csizmadia, S, Deeg, HJ, Guenther, E, Hatzes, AP, Jenkins, JM, Livingston, J, Luque, R, Mousis, O, Osborne, HLM, Palle, E, Redfield, S, Van Eylen, V, Twicken, JD, Winn, JN, Alqasim, A, Collins, KI, Gnilka, CL, Latham, DW, Lewis, HM, Relles, HM, Ricker, GR, Rowden, P, Seager, S, Shporer, A, Tan, TG, Vanderburg, A & Vanderspek, R 2023, 'TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star', Astronomy and Astrophysics, vol. 674, A117. https://doi.org/10.1051/0004-6361/202345961

TY - JOUR

T1 - TOI-733 b

T2 - A planet in the small-planet radius valley orbiting a Sun-like star

AU - Georgieva, Iskra Y.

AU - Persson, Carina M.

AU - Goffo, Elisa

AU - Acuña, Lorena

AU - Aguichine, Artyom

AU - Serrano, Luisa M.

AU - Lam, Kristine W.F.

AU - Gandolfi, Davide

AU - Collins, Karen A.

AU - Howell, Steven B.

AU - Dai, Fei

AU - Fridlund, Malcolm

AU - Korth, Judith

AU - Deleuil, Magali

AU - Barragán, Oscar

AU - Cochran, William D.

AU - Csizmadia, Szilárd

AU - Deeg, Hans J.

AU - Guenther, Eike

AU - Hatzes, Artie P.

AU - Jenkins, Jon M.

AU - Livingston, John

AU - Luque, Rafael

AU - Mousis, Olivier

AU - Osborne, Hannah L.M.

AU - Palle, Enric

AU - Redfield, Seth

AU - Van Eylen, Vincent

AU - Twicken, Joseph D.

AU - Winn, Joshua N.

AU - Alqasim, Ahlam

AU - Collins, Kevin I.

AU - Gnilka, Crystal L.

AU - Latham, David W.

AU - Lewis, Hannah M.

AU - Relles, Howard M.

AU - Ricker, George R.

AU - Rowden, Pamela

AU - Seager, Sara

AU - Shporer, Avi

AU - Tan, Thiam Guan

AU - Vanderburg, Andrew

AU - Vanderspek, Roland

PY - 2023/6/1

Y1 - 2023/6/1

N2 - We report the discovery of a hot (Teq ≈ 1055 K) planet in the small-planet radius valley that transits the Sun-like star TOI-733. It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of {equation presented} days and a radius of {equation presented}. Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K = 2.23 ± 0.26 m s-1, translating into a planet mass of {equation presented}. These parameters imply that the planet is of moderate density ({equation presented}) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram. Combining these with stellar parameters and abundances, we calculated planet interior and atmosphere models, which in turn suggest that TOI-733 b has a volatile-enriched, most likely secondary outer envelope, and may represent a highly irradiated ocean world. This is one of only a few such planets around G-type stars that are well characterised.

AB - We report the discovery of a hot (Teq ≈ 1055 K) planet in the small-planet radius valley that transits the Sun-like star TOI-733. It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of {equation presented} days and a radius of {equation presented}. Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K = 2.23 ± 0.26 m s-1, translating into a planet mass of {equation presented}. These parameters imply that the planet is of moderate density ({equation presented}) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram. Combining these with stellar parameters and abundances, we calculated planet interior and atmosphere models, which in turn suggest that TOI-733 b has a volatile-enriched, most likely secondary outer envelope, and may represent a highly irradiated ocean world. This is one of only a few such planets around G-type stars that are well characterised.

KW - Planets and satellites: composition

KW - Planets and satellites: detection

KW - Planets and satellites: individual: TOI-733

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85163191861&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85163191861&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202345961

DO - 10.1051/0004-6361/202345961

M3 - Article

AN - SCOPUS:85163191861

SN - 0004-6361

VL - 674

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A117

ER -

TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this