HD 20329b: An ultra-short-period planet around a solar-type star found by TESS

F. Murgas; G. Nowak; T. Masseron; H. Parviainen; R. Luque; E. Pallé; J. Korth; I. Carleo; Sz Csizmadia; E. Esparza-Borges; A. Alqasim; W. D. Cochran; F. Dai; H. J. Deeg; D. Gandolfi; E. Goffo; P. Kabáth; K. W.F. Lam; J. Livingston; A. Muresan; H. L.M. Osborne; C. M. Persson; L. M. Serrano; A. M.S. Smith; V. Van Eylen; J. Orell-Miquel; N. R. Hinkel; D. Galán; M. Puig-Subirà; M. Stangret; A. Fukui; T. Kagetani; N. Narita; D. R. Ciardi; A. W. Boyle; C. Ziegler; C. Briceño; N. Law; A. W. Mann; J. M. Jenkins; D. W. Latham; S. N. Quinn; G. Ricker; S. Seager; A. Shporer; E. B. Ting; R. Vanderspek; J. N. Winn

doi:10.1051/0004-6361/202244459

HD 20329b: An ultra-short-period planet around a solar-type star found by TESS

F. Murgas, G. Nowak, T. Masseron, H. Parviainen, R. Luque, E. Pallé, J. Korth, I. Carleo, Sz Csizmadia, E. Esparza-Borges, A. Alqasim, W. D. Cochran, F. Dai, H. J. Deeg, D. Gandolfi, E. Goffo, P. Kabáth, K. W.F. Lam, J. Livingston, A. MuresanH. L.M. Osborne, C. M. Persson, L. M. Serrano, A. M.S. Smith, V. Van Eylen, J. Orell-Miquel, N. R. Hinkel, D. Galán, M. Puig-Subirà, M. Stangret, A. Fukui, T. Kagetani, N. Narita, D. R. Ciardi, A. W. Boyle, C. Ziegler, C. Briceño, N. Law, A. W. Mann, J. M. Jenkins, D. W. Latham, S. N. Quinn, G. Ricker, S. Seager, A. Shporer, E. B. Ting, R. Vanderspek, J. N. Winn

Astrophysical Sciences

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11 Scopus citations

Abstract

Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. Aims. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. Methods. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize HD 20329b, a USP planet transiting a solar-type star. The host star (HD 20329, V = 8.74 mag, J = 7.5 mag) is characterized by its G5 spectral type with M∗ = 0.90 ± 0.05 M⊙, R∗ = 1.13 ± 0.02 R⊙, and Teff = 5596 ± 50 K; it is located at a distance d = 63.68 ± 0.29 pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261 ± (0.5 ×10-4) days, a planetary radius of 1.72 ± 0.07 R∗, and a mass of 7.42 ± 1.09 M∗, implying a mean density of ρp = 8.06 ± 1.53 g cm-3. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements.

Original language	English (US)
Article number	A158
Journal	Astronomy and Astrophysics
Volume	668
DOIs	https://doi.org/10.1051/0004-6361/202244459
State	Published - Dec 1 2022

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planets and satellites: detection
Techniques: photometric
Techniques: radial velocities

Access to Document

10.1051/0004-6361/202244459

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Murgas, F., Nowak, G., Masseron, T., Parviainen, H., Luque, R., Pallé, E., Korth, J., Carleo, I., Csizmadia, S., Esparza-Borges, E., Alqasim, A., Cochran, W. D., Dai, F., Deeg, H. J., Gandolfi, D., Goffo, E., Kabáth, P., Lam, K. W. F., Livingston, J., ... Winn, J. N. (2022). HD 20329b: An ultra-short-period planet around a solar-type star found by TESS. Astronomy and Astrophysics, 668, Article A158. https://doi.org/10.1051/0004-6361/202244459

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title = "HD 20329b: An ultra-short-period planet around a solar-type star found by TESS",

abstract = "Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. Aims. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. Methods. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize HD 20329b, a USP planet transiting a solar-type star. The host star (HD 20329, V = 8.74 mag, J = 7.5 mag) is characterized by its G5 spectral type with M∗ = 0.90 ± 0.05 M⊙, R∗ = 1.13 ± 0.02 R⊙, and Teff = 5596 ± 50 K; it is located at a distance d = 63.68 ± 0.29 pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261 ± (0.5 ×10-4) days, a planetary radius of 1.72 ± 0.07 R∗, and a mass of 7.42 ± 1.09 M∗, implying a mean density of ρp = 8.06 ± 1.53 g cm-3. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements.",

keywords = "Planets and satellites: detection, Techniques: photometric, Techniques: radial velocities",

author = "F. Murgas and G. Nowak and T. Masseron and H. Parviainen and R. Luque and E. Pall{\'e} and J. Korth and I. Carleo and Sz Csizmadia and E. Esparza-Borges and A. Alqasim and Cochran, {W. D.} and F. Dai and Deeg, {H. J.} and D. Gandolfi and E. Goffo and P. Kab{\'a}th and Lam, {K. W.F.} and J. Livingston and A. Muresan and Osborne, {H. L.M.} and Persson, {C. M.} and Serrano, {L. M.} and Smith, {A. M.S.} and {Van Eylen}, V. and J. Orell-Miquel and Hinkel, {N. R.} and D. Gal{\'a}n and M. Puig-Subir{\`a} and M. Stangret and A. Fukui and T. Kagetani and N. Narita and Ciardi, {D. R.} and Boyle, {A. W.} and C. Ziegler and C. Brice{\~n}o and N. Law and Mann, {A. W.} and Jenkins, {J. M.} and Latham, {D. W.} and Quinn, {S. N.} and G. Ricker and S. Seager and A. Shporer and Ting, {E. B.} and R. Vanderspek and Winn, {J. N.}",

year = "2022",

month = dec,

day = "1",

doi = "10.1051/0004-6361/202244459",

language = "English (US)",

volume = "668",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Murgas, F, Nowak, G, Masseron, T, Parviainen, H, Luque, R, Pallé, E, Korth, J, Carleo, I, Csizmadia, S, Esparza-Borges, E, Alqasim, A, Cochran, WD, Dai, F, Deeg, HJ, Gandolfi, D, Goffo, E, Kabáth, P, Lam, KWF, Livingston, J, Muresan, A, Osborne, HLM, Persson, CM, Serrano, LM, Smith, AMS, Van Eylen, V, Orell-Miquel, J, Hinkel, NR, Galán, D, Puig-Subirà, M, Stangret, M, Fukui, A, Kagetani, T, Narita, N, Ciardi, DR, Boyle, AW, Ziegler, C, Briceño, C, Law, N, Mann, AW, Jenkins, JM, Latham, DW, Quinn, SN, Ricker, G, Seager, S, Shporer, A, Ting, EB, Vanderspek, R & Winn, JN 2022, 'HD 20329b: An ultra-short-period planet around a solar-type star found by TESS', Astronomy and Astrophysics, vol. 668, A158. https://doi.org/10.1051/0004-6361/202244459

TY - JOUR

T1 - HD 20329b

T2 - An ultra-short-period planet around a solar-type star found by TESS

AU - Murgas, F.

AU - Nowak, G.

AU - Masseron, T.

AU - Parviainen, H.

AU - Luque, R.

AU - Pallé, E.

AU - Korth, J.

AU - Carleo, I.

AU - Csizmadia, Sz

AU - Esparza-Borges, E.

AU - Alqasim, A.

AU - Cochran, W. D.

AU - Dai, F.

AU - Deeg, H. J.

AU - Gandolfi, D.

AU - Goffo, E.

AU - Kabáth, P.

AU - Lam, K. W.F.

AU - Livingston, J.

AU - Muresan, A.

AU - Osborne, H. L.M.

AU - Persson, C. M.

AU - Serrano, L. M.

AU - Smith, A. M.S.

AU - Van Eylen, V.

AU - Orell-Miquel, J.

AU - Hinkel, N. R.

AU - Galán, D.

AU - Puig-Subirà, M.

AU - Stangret, M.

AU - Fukui, A.

AU - Kagetani, T.

AU - Narita, N.

AU - Ciardi, D. R.

AU - Boyle, A. W.

AU - Ziegler, C.

AU - Briceño, C.

AU - Law, N.

AU - Mann, A. W.

AU - Jenkins, J. M.

AU - Latham, D. W.

AU - Quinn, S. N.

AU - Ricker, G.

AU - Seager, S.

AU - Shporer, A.

AU - Ting, E. B.

AU - Vanderspek, R.

AU - Winn, J. N.

PY - 2022/12/1

Y1 - 2022/12/1

N2 - Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. Aims. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. Methods. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize HD 20329b, a USP planet transiting a solar-type star. The host star (HD 20329, V = 8.74 mag, J = 7.5 mag) is characterized by its G5 spectral type with M∗ = 0.90 ± 0.05 M⊙, R∗ = 1.13 ± 0.02 R⊙, and Teff = 5596 ± 50 K; it is located at a distance d = 63.68 ± 0.29 pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261 ± (0.5 ×10-4) days, a planetary radius of 1.72 ± 0.07 R∗, and a mass of 7.42 ± 1.09 M∗, implying a mean density of ρp = 8.06 ± 1.53 g cm-3. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements.

AB - Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. Aims. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. Methods. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize HD 20329b, a USP planet transiting a solar-type star. The host star (HD 20329, V = 8.74 mag, J = 7.5 mag) is characterized by its G5 spectral type with M∗ = 0.90 ± 0.05 M⊙, R∗ = 1.13 ± 0.02 R⊙, and Teff = 5596 ± 50 K; it is located at a distance d = 63.68 ± 0.29 pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261 ± (0.5 ×10-4) days, a planetary radius of 1.72 ± 0.07 R∗, and a mass of 7.42 ± 1.09 M∗, implying a mean density of ρp = 8.06 ± 1.53 g cm-3. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements.

KW - Planets and satellites: detection

KW - Techniques: photometric

KW - Techniques: radial velocities

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U2 - 10.1051/0004-6361/202244459

DO - 10.1051/0004-6361/202244459

M3 - Article

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SN - 0004-6361

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JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A158

ER -

HD 20329b: An ultra-short-period planet around a solar-type star found by TESS

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All Science Journal Classification (ASJC) codes

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