Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

R. Luque; G. Nowak; E. Pallé; F. Dai; A. Kaminski; E. Nagel; D. Hidalgo; F. Bauer; M. Lafarga; J. Livingston; O. Barragán; T. Hirano; M. Fridlund; D. Gandolfi; A. B. Justesen; M. Hjorth; V. Van Eylen; J. N. Winn; M. Esposito; J. C. Morales; S. Albrecht; R. Alonso; P. J. Amado; P. Beck; J. A. Caballero; J. Cabrera; W. D. Cochran; Sz Csizmadia; H. Deeg; Ph Eigmüller; M. Endl; A. Erikson; A. Fukui; S. Grziwa; E. W. Guenther; A. P. Hatzes; E. Knudstrup; J. Korth; K. W.F. Lam; M. N. Lund; S. Mathur; P. Montañes-Rodríguez; N. Narita; D. Nespral; P. Niraula; M. Pätzold; C. M. Persson; J. Prieto-Arranz; A. Quirrenbach; H. Rauer; S. Redfield; A. Reiners; I. Ribas; A. M.S. Smith

doi:10.1051/0004-6361/201834952

Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

R. Luque, G. Nowak, E. Pallé, F. Dai, A. Kaminski, E. Nagel, D. Hidalgo, F. Bauer, M. Lafarga, J. Livingston, O. Barragán, T. Hirano, M. Fridlund, D. Gandolfi, A. B. Justesen, M. Hjorth, V. Van Eylen, J. N. Winn, M. Esposito, J. C. MoralesS. Albrecht, R. Alonso, P. J. Amado, P. Beck, J. A. Caballero, J. Cabrera, W. D. Cochran, Sz Csizmadia, H. Deeg, Ph Eigmüller, M. Endl, A. Erikson, A. Fukui, S. Grziwa, E. W. Guenther, A. P. Hatzes, E. Knudstrup, J. Korth, K. W.F. Lam, M. N. Lund, S. Mathur, P. Montañes-Rodríguez, N. Narita, D. Nespral, P. Niraula, M. Pätzold, C. M. Persson, J. Prieto-Arranz, A. Quirrenbach, H. Rauer, S. Redfield, A. Reiners, I. Ribas, A. M.S. Smith

Astrophysical Sciences

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Abstract

We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M_∗ = 1.00 ± 0.03 M_Ȯ and R_∗ = 1.09 ± 0.03 R_Ȯ, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of R_p=2.63_-0.10^+0.12 R_Ȯ and mass of M_p=24.5_-4.4^+4.4 M_Ȯ, yielding a mean density of ρ_p=7.4_-1.5^+1.6 g cm^-3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γ_RV =-0.40_-0.07^+0.07 m s^-1 d^-1) that suggests a long-period companion with a minimum mass on the order of 33 M_Ȯ. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.

Original language	English (US)
Article number	A114
Journal	Astronomy and Astrophysics
Volume	623
DOIs	https://doi.org/10.1051/0004-6361/201834952
State	Published - Mar 1 2019

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: individual: HD 119130
Stars: individual: K2-292
Techniques: high angular resolution
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/201834952

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Luque, R., Nowak, G., Pallé, E., Dai, F., Kaminski, A., Nagel, E., Hidalgo, D., Bauer, F., Lafarga, M., Livingston, J., Barragán, O., Hirano, T., Fridlund, M., Gandolfi, D., Justesen, A. B., Hjorth, M., Van Eylen, V., Winn, J. N., Esposito, M., ... Smith, A. M. S. (2019). Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292. Astronomy and Astrophysics, 623, Article A114. https://doi.org/10.1051/0004-6361/201834952

@article{aaaf17bbc21241459925edcee2db4cde,

title = "Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292",

abstract = "We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M∗ = 1.00 ± 0.03 MȮ and R∗ = 1.09 ± 0.03 RȮ, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of Rp=2.63-0.10+0.12 RȮ and mass of Mp=24.5-4.4+4.4 MȮ, yielding a mean density of ρp=7.4-1.5+1.6 g cm-3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γRV =-0.40-0.07+0.07 m s-1 d-1) that suggests a long-period companion with a minimum mass on the order of 33 MȮ. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.",

keywords = "Planetary systems, Stars: individual: HD 119130, Stars: individual: K2-292, Techniques: high angular resolution, Techniques: photometric, Techniques: radial velocities",

author = "R. Luque and G. Nowak and E. Pall{\'e} and F. Dai and A. Kaminski and E. Nagel and D. Hidalgo and F. Bauer and M. Lafarga and J. Livingston and O. Barrag{\'a}n and T. Hirano and M. Fridlund and D. Gandolfi and Justesen, {A. B.} and M. Hjorth and {Van Eylen}, V. and Winn, {J. N.} and M. Esposito and Morales, {J. C.} and S. Albrecht and R. Alonso and Amado, {P. J.} and P. Beck and Caballero, {J. A.} and J. Cabrera and Cochran, {W. D.} and Sz Csizmadia and H. Deeg and Ph Eigm{\"u}ller and M. Endl and A. Erikson and A. Fukui and S. Grziwa and Guenther, {E. W.} and Hatzes, {A. P.} and E. Knudstrup and J. Korth and Lam, {K. W.F.} and Lund, {M. N.} and S. Mathur and P. Monta{\~n}es-Rodr{\'i}guez and N. Narita and D. Nespral and P. Niraula and M. P{\"a}tzold and Persson, {C. M.} and J. Prieto-Arranz and A. Quirrenbach and H. Rauer and S. Redfield and A. Reiners and I. Ribas and Smith, {A. M.S.}",

note = "Publisher Copyright: {\textcopyright} 2019 ESO.",

year = "2019",

month = mar,

day = "1",

doi = "10.1051/0004-6361/201834952",

language = "English (US)",

volume = "623",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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Luque, R, Nowak, G, Pallé, E, Dai, F, Kaminski, A, Nagel, E, Hidalgo, D, Bauer, F, Lafarga, M, Livingston, J, Barragán, O, Hirano, T, Fridlund, M, Gandolfi, D, Justesen, AB, Hjorth, M, Van Eylen, V, Winn, JN, Esposito, M, Morales, JC, Albrecht, S, Alonso, R, Amado, PJ, Beck, P, Caballero, JA, Cabrera, J, Cochran, WD, Csizmadia, S, Deeg, H, Eigmüller, P, Endl, M, Erikson, A, Fukui, A, Grziwa, S, Guenther, EW, Hatzes, AP, Knudstrup, E, Korth, J, Lam, KWF, Lund, MN, Mathur, S, Montañes-Rodríguez, P, Narita, N, Nespral, D, Niraula, P, Pätzold, M, Persson, CM, Prieto-Arranz, J, Quirrenbach, A, Rauer, H, Redfield, S, Reiners, A, Ribas, I & Smith, AMS 2019, 'Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292', Astronomy and Astrophysics, vol. 623, A114. https://doi.org/10.1051/0004-6361/201834952

TY - JOUR

T1 - Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

AU - Luque, R.

AU - Nowak, G.

AU - Pallé, E.

AU - Dai, F.

AU - Kaminski, A.

AU - Nagel, E.

AU - Hidalgo, D.

AU - Bauer, F.

AU - Lafarga, M.

AU - Livingston, J.

AU - Barragán, O.

AU - Hirano, T.

AU - Fridlund, M.

AU - Gandolfi, D.

AU - Justesen, A. B.

AU - Hjorth, M.

AU - Van Eylen, V.

AU - Winn, J. N.

AU - Esposito, M.

AU - Morales, J. C.

AU - Albrecht, S.

AU - Alonso, R.

AU - Amado, P. J.

AU - Beck, P.

AU - Caballero, J. A.

AU - Cabrera, J.

AU - Cochran, W. D.

AU - Csizmadia, Sz

AU - Deeg, H.

AU - Eigmüller, Ph

AU - Endl, M.

AU - Erikson, A.

AU - Fukui, A.

AU - Grziwa, S.

AU - Guenther, E. W.

AU - Hatzes, A. P.

AU - Knudstrup, E.

AU - Korth, J.

AU - Lam, K. W.F.

AU - Lund, M. N.

AU - Mathur, S.

AU - Montañes-Rodríguez, P.

AU - Narita, N.

AU - Nespral, D.

AU - Niraula, P.

AU - Pätzold, M.

AU - Persson, C. M.

AU - Prieto-Arranz, J.

AU - Quirrenbach, A.

AU - Rauer, H.

AU - Redfield, S.

AU - Reiners, A.

AU - Ribas, I.

AU - Smith, A. M.S.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M∗ = 1.00 ± 0.03 MȮ and R∗ = 1.09 ± 0.03 RȮ, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of Rp=2.63-0.10+0.12 RȮ and mass of Mp=24.5-4.4+4.4 MȮ, yielding a mean density of ρp=7.4-1.5+1.6 g cm-3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γRV =-0.40-0.07+0.07 m s-1 d-1) that suggests a long-period companion with a minimum mass on the order of 33 MȮ. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.

AB - We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M∗ = 1.00 ± 0.03 MȮ and R∗ = 1.09 ± 0.03 RȮ, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of Rp=2.63-0.10+0.12 RȮ and mass of Mp=24.5-4.4+4.4 MȮ, yielding a mean density of ρp=7.4-1.5+1.6 g cm-3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γRV =-0.40-0.07+0.07 m s-1 d-1) that suggests a long-period companion with a minimum mass on the order of 33 MȮ. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.

KW - Planetary systems

KW - Stars: individual: HD 119130

KW - Stars: individual: K2-292

KW - Techniques: high angular resolution

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85063048019&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063048019&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201834952

DO - 10.1051/0004-6361/201834952

M3 - Article

AN - SCOPUS:85063048019

SN - 0004-6361

VL - 623

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A114

ER -

Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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