TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet

Johanna Teske; Matias R. Diaz; Rafael Luque; Teo Mocnik; Julia V. Seidel; Jon Fernandez Otegi; Fabo Feng; James S. Jenkins; Enric Pall; Damien Segransan; St phane Udry; Karen A. Collins; Jason D. Eastman; George R. Ricker; Roland Vanderspek; David W. Latham; Sara Seager; Joshua N. Winn; Jon M. Jenkins; David R. Anderson; Thomas Barclay; Fran ois Bouchy; Jennifer A. Burt; R. Paul Butler; Douglas A. Caldwell; Kevin I. Collins; Jeffrey D. Crane; Caroline Dorn; Erin Flowers; Jonas Haldemann; Ravit Helled; Coel Hellier; Eric L.N. Jensen; Stephen R. Kane; Nicholas Law; Jack J. Lissauer; Andrew W. Mann; Maxime Marmier; Louise Dyregaard Nielsen; Mark E. Rose; Stephen A. Shectman; Avi Shporer; Guillermo Torres; Sharon X. Wang; Angie Wolfgang; Ian Wong; Carl Ziegler

doi:10.3847/1538-3881/ab9f95

TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet

Johanna Teske, Matias R. Diaz, Rafael Luque, Teo Mocnik, Julia V. Seidel, Jon Fernandez Otegi, Fabo Feng, James S. Jenkins, Enric Pall, Damien Segransan, St phane Udry, Karen A. Collins, Jason D. Eastman, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, David R. AndersonThomas Barclay, Fran ois Bouchy, Jennifer A. Burt, R. Paul Butler, Douglas A. Caldwell, Kevin I. Collins, Jeffrey D. Crane, Caroline Dorn, Erin Flowers, Jonas Haldemann, Ravit Helled, Coel Hellier, Eric L.N. Jensen, Stephen R. Kane, Nicholas Law, Jack J. Lissauer, Andrew W. Mann, Maxime Marmier, Louise Dyregaard Nielsen, Mark E. Rose, Stephen A. Shectman, Avi Shporer, Guillermo Torres, Sharon X. Wang, Angie Wolfgang, Ian Wong, Carl Ziegler

Astronomy & Astrophysics

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26 Scopus citations

Abstract

The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting planet around the bright (V = 7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16 0.08 R ⊕ and a mass of M ⊕, based on archival and new radial velocity data. We also update the parameters of the longer-period, not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density of the transiting planet is 3.97 g cm-3, which is low enough to suggest that the planet has at least a small volatile envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness, planet period, and location of the planet near both the "radius gap"and the "hot Neptune desert,"HD 86226c is an interesting candidate for transmission spectroscopy to further refine its composition.

Original language	English (US)
Article number	96
Journal	Astronomical Journal
Volume	160
Issue number	2
DOIs	https://doi.org/10.3847/1538-3881/ab9f95
State	Published - Aug 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/ab9f95

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Teske, J., Diaz, M. R., Luque, R., Mocnik, T., Seidel, J. V., Otegi, J. F., Feng, F., Jenkins, J. S., Pall, E., Segransan, D., Udry, S. P., Collins, K. A., Eastman, J. D., Ricker, G. R., Vanderspek, R., Latham, D. W., Seager, S., Winn, J. N., Jenkins, J. M., ... Ziegler, C. (2020). TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet. Astronomical Journal, 160(2), Article 96. https://doi.org/10.3847/1538-3881/ab9f95

@article{c7e50ebcfb4f4faf85c7d666057e705c,

title = "TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet",

abstract = "The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting planet around the bright (V = 7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16 0.08 R ⊕ and a mass of M ⊕, based on archival and new radial velocity data. We also update the parameters of the longer-period, not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density of the transiting planet is 3.97 g cm-3, which is low enough to suggest that the planet has at least a small volatile envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness, planet period, and location of the planet near both the {"}radius gap{"}and the {"}hot Neptune desert,{"}HD 86226c is an interesting candidate for transmission spectroscopy to further refine its composition.",

author = "Johanna Teske and Diaz, {Matias R.} and Rafael Luque and Teo Mocnik and Seidel, {Julia V.} and Otegi, {Jon Fernandez} and Fabo Feng and Jenkins, {James S.} and Enric Pall and Damien Segransan and Udry, {St phane} and Collins, {Karen A.} and Eastman, {Jason D.} and Ricker, {George R.} and Roland Vanderspek and Latham, {David W.} and Sara Seager and Winn, {Joshua N.} and Jenkins, {Jon M.} and Anderson, {David R.} and Thomas Barclay and Bouchy, {Fran ois} and Burt, {Jennifer A.} and Butler, {R. Paul} and Caldwell, {Douglas A.} and Collins, {Kevin I.} and Crane, {Jeffrey D.} and Caroline Dorn and Erin Flowers and Jonas Haldemann and Ravit Helled and Coel Hellier and Jensen, {Eric L.N.} and Kane, {Stephen R.} and Nicholas Law and Lissauer, {Jack J.} and Mann, {Andrew W.} and Maxime Marmier and Nielsen, {Louise Dyregaard} and Rose, {Mark E.} and Shectman, {Stephen A.} and Avi Shporer and Guillermo Torres and Wang, {Sharon X.} and Angie Wolfgang and Ian Wong and Carl Ziegler",

year = "2020",

month = aug,

doi = "10.3847/1538-3881/ab9f95",

language = "English (US)",

volume = "160",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Teske, J, Diaz, MR, Luque, R, Mocnik, T, Seidel, JV, Otegi, JF, Feng, F, Jenkins, JS, Pall, E, Segransan, D, Udry, SP, Collins, KA, Eastman, JD, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Jenkins, JM, Anderson, DR, Barclay, T, Bouchy, FO, Burt, JA, Butler, RP, Caldwell, DA, Collins, KI, Crane, JD, Dorn, C, Flowers, E, Haldemann, J, Helled, R, Hellier, C, Jensen, ELN, Kane, SR, Law, N, Lissauer, JJ, Mann, AW, Marmier, M, Nielsen, LD, Rose, ME, Shectman, SA, Shporer, A, Torres, G, Wang, SX, Wolfgang, A, Wong, I & Ziegler, C 2020, 'TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet', Astronomical Journal, vol. 160, no. 2, 96. https://doi.org/10.3847/1538-3881/ab9f95

TY - JOUR

T1 - TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet

AU - Teske, Johanna

AU - Diaz, Matias R.

AU - Luque, Rafael

AU - Mocnik, Teo

AU - Seidel, Julia V.

AU - Otegi, Jon Fernandez

AU - Feng, Fabo

AU - Jenkins, James S.

AU - Pall, Enric

AU - Segransan, Damien

AU - Udry, St phane

AU - Collins, Karen A.

AU - Eastman, Jason D.

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Latham, David W.

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Anderson, David R.

AU - Barclay, Thomas

AU - Bouchy, Fran ois

AU - Burt, Jennifer A.

AU - Butler, R. Paul

AU - Caldwell, Douglas A.

AU - Collins, Kevin I.

AU - Crane, Jeffrey D.

AU - Dorn, Caroline

AU - Flowers, Erin

AU - Haldemann, Jonas

AU - Helled, Ravit

AU - Hellier, Coel

AU - Jensen, Eric L.N.

AU - Kane, Stephen R.

AU - Law, Nicholas

AU - Lissauer, Jack J.

AU - Mann, Andrew W.

AU - Marmier, Maxime

AU - Nielsen, Louise Dyregaard

AU - Rose, Mark E.

AU - Shectman, Stephen A.

AU - Shporer, Avi

AU - Torres, Guillermo

AU - Wang, Sharon X.

AU - Wolfgang, Angie

AU - Wong, Ian

AU - Ziegler, Carl

PY - 2020/8

Y1 - 2020/8

N2 - The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting planet around the bright (V = 7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16 0.08 R ⊕ and a mass of M ⊕, based on archival and new radial velocity data. We also update the parameters of the longer-period, not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density of the transiting planet is 3.97 g cm-3, which is low enough to suggest that the planet has at least a small volatile envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness, planet period, and location of the planet near both the "radius gap"and the "hot Neptune desert,"HD 86226c is an interesting candidate for transmission spectroscopy to further refine its composition.

AB - The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting planet around the bright (V = 7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16 0.08 R ⊕ and a mass of M ⊕, based on archival and new radial velocity data. We also update the parameters of the longer-period, not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density of the transiting planet is 3.97 g cm-3, which is low enough to suggest that the planet has at least a small volatile envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness, planet period, and location of the planet near both the "radius gap"and the "hot Neptune desert,"HD 86226c is an interesting candidate for transmission spectroscopy to further refine its composition.

UR - http://www.scopus.com/inward/record.url?scp=85091249644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85091249644&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/ab9f95

DO - 10.3847/1538-3881/ab9f95

M3 - Article

AN - SCOPUS:85091249644

SN - 0004-6256

VL - 160

JO - Astronomical Journal

JF - Astronomical Journal

IS - 2

M1 - 96

ER -

TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet

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