TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star

P. Chaturvedi; E. Goffo; D. Gandolfi; C. M. Persson; A. P. Hatzes; G. Nowak; A. Bonfanti; A. Bieryla; W. D. Cochran; K. A. Collins; S. B. Fajardo-Acosta; S. B. Howell; J. M. Jenkins; J. Korth; J. Livingston; E. Pallé; S. N. Quinn; R. P. Schwarz; S. Seager; A. Shporer; K. G. Stassun; S. Striegel; V. Van Eylen; C. N. Watkins; J. N. Winn; C. Ziegler

doi:10.1051/0004-6361/202453511

TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star

P. Chaturvedi
, E. Goffo
, D. Gandolfi
, C. M. Persson
, A. P. Hatzes
, G. Nowak
, A. Bonfanti
, A. Bieryla
, W. D. Cochran
, K. A. Collins
, S. B. Fajardo-Acosta
, S. B. Howell
, J. M. Jenkins
, J. Korth
, J. Livingston
, E. Pallé
, S. N. Quinn
, R. P. Schwarz
, S. Seager
, A. Shporer

K. G. Stassun, S. Striegel, V. Van Eylen, C. N. Watkins, J. N. Winn, C. Ziegler

Astrophysical Sciences

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

Abstract

We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0 ± 1.2 M_⊕ and a radius of 3.22 ± 0.08 R_⊕, implying a bulk density of 1.47_-0.22^+0.23 g cm^-3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.

Original language	English (US)
Article number	A169
Journal	Astronomy and Astrophysics
Volume	697
DOIs	https://doi.org/10.1051/0004-6361/202453511
State	Published - May 1 2025

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planets and satellites: detection
Stars: individual: TOI-3493
Stars: solar-type
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/202453511

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Chaturvedi, P., Goffo, E., Gandolfi, D., Persson, C. M., Hatzes, A. P., Nowak, G., Bonfanti, A., Bieryla, A., Cochran, W. D., Collins, K. A., Fajardo-Acosta, S. B., Howell, S. B., Jenkins, J. M., Korth, J., Livingston, J., Pallé, E., Quinn, S. N., Schwarz, R. P., Seager, S., ... Ziegler, C. (2025). TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star. Astronomy and Astrophysics, 697, Article A169. https://doi.org/10.1051/0004-6361/202453511

@article{eb8a9e6c2b47445eb7392bf0dc5e5e9f,

title = "TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star",

abstract = "We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0 ± 1.2 M⊕ and a radius of 3.22 ± 0.08 R⊕, implying a bulk density of 1.47-0.22+0.23 g cm-3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.",

keywords = "Planets and satellites: detection, Stars: individual: TOI-3493, Stars: solar-type, Techniques: photometric, Techniques: radial velocities",

author = "P. Chaturvedi and E. Goffo and D. Gandolfi and Persson, \{C. M.\} and Hatzes, \{A. P.\} and G. Nowak and A. Bonfanti and A. Bieryla and Cochran, \{W. D.\} and Collins, \{K. A.\} and Fajardo-Acosta, \{S. B.\} and Howell, \{S. B.\} and Jenkins, \{J. M.\} and J. Korth and J. Livingston and E. Pall{\'e} and Quinn, \{S. N.\} and Schwarz, \{R. P.\} and S. Seager and A. Shporer and Stassun, \{K. G.\} and S. Striegel and \{Van Eylen\}, V. and Watkins, \{C. N.\} and Winn, \{J. N.\} and C. Ziegler",

year = "2025",

month = may,

day = "1",

doi = "10.1051/0004-6361/202453511",

language = "English (US)",

volume = "697",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Chaturvedi, P, Goffo, E, Gandolfi, D, Persson, CM, Hatzes, AP, Nowak, G, Bonfanti, A, Bieryla, A, Cochran, WD, Collins, KA, Fajardo-Acosta, SB, Howell, SB, Jenkins, JM, Korth, J, Livingston, J, Pallé, E, Quinn, SN, Schwarz, RP, Seager, S, Shporer, A, Stassun, KG, Striegel, S, Van Eylen, V, Watkins, CN, Winn, JN & Ziegler, C 2025, 'TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star', Astronomy and Astrophysics, vol. 697, A169. https://doi.org/10.1051/0004-6361/202453511

TY - JOUR

T1 - TOI-3493 b

T2 - A planet with a Neptune-like density transiting a bright G0-type star

AU - Chaturvedi, P.

AU - Goffo, E.

AU - Gandolfi, D.

AU - Persson, C. M.

AU - Hatzes, A. P.

AU - Nowak, G.

AU - Bonfanti, A.

AU - Bieryla, A.

AU - Cochran, W. D.

AU - Collins, K. A.

AU - Fajardo-Acosta, S. B.

AU - Howell, S. B.

AU - Jenkins, J. M.

AU - Korth, J.

AU - Livingston, J.

AU - Pallé, E.

AU - Quinn, S. N.

AU - Schwarz, R. P.

AU - Seager, S.

AU - Shporer, A.

AU - Stassun, K. G.

AU - Striegel, S.

AU - Van Eylen, V.

AU - Watkins, C. N.

AU - Winn, J. N.

AU - Ziegler, C.

PY - 2025/5/1

Y1 - 2025/5/1

N2 - We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0 ± 1.2 M⊕ and a radius of 3.22 ± 0.08 R⊕, implying a bulk density of 1.47-0.22+0.23 g cm-3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.

AB - We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0 ± 1.2 M⊕ and a radius of 3.22 ± 0.08 R⊕, implying a bulk density of 1.47-0.22+0.23 g cm-3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.

KW - Planets and satellites: detection

KW - Stars: individual: TOI-3493

KW - Stars: solar-type

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - https://www.scopus.com/pages/publications/105005656796

UR - https://www.scopus.com/pages/publications/105005656796#tab=citedBy

U2 - 10.1051/0004-6361/202453511

DO - 10.1051/0004-6361/202453511

M3 - Article

AN - SCOPUS:105005656796

SN - 0004-6361

VL - 697

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A169

ER -

TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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