TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522

Madyson G. Barber; Pa Chia Thao; Andrew W. Mann; Andrew Vanderburg; Mayuko Mori; John H. Livingston; Akihiko Fukui; Norio Narita; Adam L. Kraus; Benjamin M. Tofflemire; Elisabeth R. Newton; Joshua N. Winn; Jon M. Jenkins; Sara Seager; Karen A. Collins; Joseph D. Twicken

doi:10.3847/2041-8213/ad77d9

TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522

Madyson G. Barber, Pa Chia Thao, Andrew W. Mann, Andrew Vanderburg, Mayuko Mori, John H. Livingston, Akihiko Fukui, Norio Narita, Adam L. Kraus, Benjamin M. Tofflemire, Elisabeth R. Newton, Joshua N. Winn, Jon M. Jenkins, Sara Seager, Karen A. Collins, Joseph D. Twicken

Astrophysical Sciences

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11 Scopus citations

Abstract

The youngest (<50 Myr) planets are vital to understand planet formation and early evolution. The 17 Myr system HIP 67522 is already known to host a giant (≃10R _⊕) planet on a tight orbit. In their discovery paper, Rizzuto et al. reported a tentative single-transit detection of an additional planet in the system using TESS. Here, we report the discovery of HIP 67522c, a 7.9 R _⊕ planet that matches with that single-transit event. We confirm the signal with ground-based multiwavelength photometry from Sinistro and MuSCAT4. At a period of 14.33 days, planet c is close to a 2:1 mean-motion resonance with b (6.96 days or 2.06:1). The light curve shows distortions during many of the transits, which are consistent with spot-crossing events and/or flares. Fewer stellar activity events are seen in the transits of planet b, suggesting that planet c is crossing a more active latitude. Such distortions, combined with systematics in the TESS light-curve extraction, likely explain why planet c was previously missed.

Original language	English (US)
Article number	L30
Journal	Astrophysical Journal Letters
Volume	973
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ad77d9
State	Published - Sep 1 2024

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8213/ad77d9

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Barber, M. G., Thao, P. C., Mann, A. W., Vanderburg, A., Mori, M., Livingston, J. H., Fukui, A., Narita, N., Kraus, A. L., Tofflemire, B. M., Newton, E. R., Winn, J. N., Jenkins, J. M., Seager, S., Collins, K. A., & Twicken, J. D. (2024). TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522. Astrophysical Journal Letters, 973(1), Article L30. https://doi.org/10.3847/2041-8213/ad77d9

@article{510aeabe5d574f82b42081145eea8c69,

title = "TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522",

abstract = "The youngest (<50 Myr) planets are vital to understand planet formation and early evolution. The 17 Myr system HIP 67522 is already known to host a giant (≃10R ⊕) planet on a tight orbit. In their discovery paper, Rizzuto et al. reported a tentative single-transit detection of an additional planet in the system using TESS. Here, we report the discovery of HIP 67522c, a 7.9 R ⊕ planet that matches with that single-transit event. We confirm the signal with ground-based multiwavelength photometry from Sinistro and MuSCAT4. At a period of 14.33 days, planet c is close to a 2:1 mean-motion resonance with b (6.96 days or 2.06:1). The light curve shows distortions during many of the transits, which are consistent with spot-crossing events and/or flares. Fewer stellar activity events are seen in the transits of planet b, suggesting that planet c is crossing a more active latitude. Such distortions, combined with systematics in the TESS light-curve extraction, likely explain why planet c was previously missed.",

author = "Barber, \{Madyson G.\} and Thao, \{Pa Chia\} and Mann, \{Andrew W.\} and Andrew Vanderburg and Mayuko Mori and Livingston, \{John H.\} and Akihiko Fukui and Norio Narita and Kraus, \{Adam L.\} and Tofflemire, \{Benjamin M.\} and Newton, \{Elisabeth R.\} and Winn, \{Joshua N.\} and Jenkins, \{Jon M.\} and Sara Seager and Collins, \{Karen A.\} and Twicken, \{Joseph D.\}",

note = "Publisher Copyright: {\textcopyright} 2024. The Author(s). Published by the American Astronomical Society.",

year = "2024",

month = sep,

day = "1",

doi = "10.3847/2041-8213/ad77d9",

language = "English (US)",

volume = "973",

journal = "Astrophysical Journal Letters",

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Barber, MG, Thao, PC, Mann, AW, Vanderburg, A, Mori, M, Livingston, JH, Fukui, A, Narita, N, Kraus, AL, Tofflemire, BM, Newton, ER, Winn, JN, Jenkins, JM, Seager, S, Collins, KA & Twicken, JD 2024, 'TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522', Astrophysical Journal Letters, vol. 973, no. 1, L30. https://doi.org/10.3847/2041-8213/ad77d9

TY - JOUR

T1 - TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522

AU - Barber, Madyson G.

AU - Thao, Pa Chia

AU - Mann, Andrew W.

AU - Vanderburg, Andrew

AU - Mori, Mayuko

AU - Livingston, John H.

AU - Fukui, Akihiko

AU - Narita, Norio

AU - Kraus, Adam L.

AU - Tofflemire, Benjamin M.

AU - Newton, Elisabeth R.

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Seager, Sara

AU - Collins, Karen A.

AU - Twicken, Joseph D.

PY - 2024/9/1

Y1 - 2024/9/1

N2 - The youngest (<50 Myr) planets are vital to understand planet formation and early evolution. The 17 Myr system HIP 67522 is already known to host a giant (≃10R ⊕) planet on a tight orbit. In their discovery paper, Rizzuto et al. reported a tentative single-transit detection of an additional planet in the system using TESS. Here, we report the discovery of HIP 67522c, a 7.9 R ⊕ planet that matches with that single-transit event. We confirm the signal with ground-based multiwavelength photometry from Sinistro and MuSCAT4. At a period of 14.33 days, planet c is close to a 2:1 mean-motion resonance with b (6.96 days or 2.06:1). The light curve shows distortions during many of the transits, which are consistent with spot-crossing events and/or flares. Fewer stellar activity events are seen in the transits of planet b, suggesting that planet c is crossing a more active latitude. Such distortions, combined with systematics in the TESS light-curve extraction, likely explain why planet c was previously missed.

AB - The youngest (<50 Myr) planets are vital to understand planet formation and early evolution. The 17 Myr system HIP 67522 is already known to host a giant (≃10R ⊕) planet on a tight orbit. In their discovery paper, Rizzuto et al. reported a tentative single-transit detection of an additional planet in the system using TESS. Here, we report the discovery of HIP 67522c, a 7.9 R ⊕ planet that matches with that single-transit event. We confirm the signal with ground-based multiwavelength photometry from Sinistro and MuSCAT4. At a period of 14.33 days, planet c is close to a 2:1 mean-motion resonance with b (6.96 days or 2.06:1). The light curve shows distortions during many of the transits, which are consistent with spot-crossing events and/or flares. Fewer stellar activity events are seen in the transits of planet b, suggesting that planet c is crossing a more active latitude. Such distortions, combined with systematics in the TESS light-curve extraction, likely explain why planet c was previously missed.

UR - https://www.scopus.com/pages/publications/85205224866

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U2 - 10.3847/2041-8213/ad77d9

DO - 10.3847/2041-8213/ad77d9

M3 - Article

AN - SCOPUS:85205224866

SN - 2041-8205

VL - 973

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L30

ER -

TESS Investigation—Demographics of Young Exoplanets (TI-DYE). II. A Second Giant Planet in the 17 Myr System HIP 67522

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