K2-290: A warm Jupiter and a mini-Neptune in a triple-star system

M. Hjorth; A. B. Justesen; T. Hirano; S. Albrecht; D. Gandolfi; F. Dai; R. Alonso; O. Barragán; M. Esposito; M. Kuzuhara; K. W.F. Lam; J. H. Livingston; P. Montanes-Rodriguez; N. Narita; G. Nowak; J. Prieto-Arranz; S. Redfield; F. Rodler; V. Van Eylen; J. N. Winn; G. Antoniciello; J. Cabrera; W. D. Cochran; Sz Csizmadia; J. De Leon; H. Deeg; Ph Eigmüller; M. Endl; A. Erikson; M. Fridlund; S. Grziwa; E. Guenther; A. P. Hatzes; P. Heeren; D. Hidalgo; J. Korth; R. Luque; D. Nespral; E. Palle; M. Pätzold; C. M. Persson; H. Rauer; A. M.S. Smith; T. Trifonov

doi:10.1093/mnras/stz139

K2-290: A warm Jupiter and a mini-Neptune in a triple-star system

M. Hjorth, A. B. Justesen, T. Hirano, S. Albrecht, D. Gandolfi, F. Dai, R. Alonso, O. Barragán, M. Esposito, M. Kuzuhara, K. W.F. Lam, J. H. Livingston, P. Montanes-Rodriguez, N. Narita, G. Nowak, J. Prieto-Arranz, S. Redfield, F. Rodler, V. Van Eylen, J. N. WinnG. Antoniciello, J. Cabrera, W. D. Cochran, Sz Csizmadia, J. De Leon, H. Deeg, Ph Eigmüller, M. Endl, A. Erikson, M. Fridlund, S. Grziwa, E. Guenther, A. P. Hatzes, P. Heeren, D. Hidalgo, J. Korth, R. Luque, D. Nespral, E. Palle, M. Pätzold, C. M. Persson, H. Rauer, A. M.S. Smith, T. Trifonov

Astrophysical Sciences

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20 Scopus citations

Abstract

We report the discovery of two transiting planets orbiting K2-290 (EPIC 249624646), a bright (V = 11.11) late F-type star residing in a triple-star system. It was observed during Campaign 15 of the K2 mission, and in order to confirm and characterize the system, follow-up spectroscopy and AO imaging were carried out using the FIES, HARPS, HARPS-N, and IRCS instruments. From AO imaging and Gaia data we identify two M-dwarf companions at a separation of 113 ± 2 and 2467⁺₋¹⁷⁷₁₅₅ au. From radial velocities, K2 photometry, and stellar characterization of the host star, we find the inner planet to be a mini-Neptune with a radius of 3.06 ± 0.16 R and an orbital period of P = 9.2 d. The radius of the mini-Neptune suggests that the planet is located above the radius valley, and with an incident flux of F ∼ 400 F, it lies safely outside the super-Earth desert. The outer warm Jupiter has a mass of 0.774 ± 0.047 M_J and a radius of 1.006 ± 0.050 R_J, and orbits the host star every 48.4 d on an orbit with an eccentricity e < 0.241. Its mild eccentricity and mini-Neptune sibling suggest that the warm Jupiter originates from in situ formation or disc migration.

Original language	English (US)
Pages (from-to)	3522-3536
Number of pages	15
Journal	Monthly Notices of the Royal Astronomical Society
Volume	484
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stz139
State	Published - Apr 11 2019

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planets
Planets and satellites: detection
Planets and satellites: formation
Planets and satellites: individual: K2-290
Satellites: individual: EPIC 249624646

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10.1093/mnras/stz139

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Hjorth, M., Justesen, A. B., Hirano, T., Albrecht, S., Gandolfi, D., Dai, F., Alonso, R., Barragán, O., Esposito, M., Kuzuhara, M., Lam, K. W. F., Livingston, J. H., Montanes-Rodriguez, P., Narita, N., Nowak, G., Prieto-Arranz, J., Redfield, S., Rodler, F., Van Eylen, V., ... Trifonov, T. (2019). K2-290: A warm Jupiter and a mini-Neptune in a triple-star system. Monthly Notices of the Royal Astronomical Society, 484(3), 3522-3536. https://doi.org/10.1093/mnras/stz139

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title = "K2-290: A warm Jupiter and a mini-Neptune in a triple-star system",

abstract = "We report the discovery of two transiting planets orbiting K2-290 (EPIC 249624646), a bright (V = 11.11) late F-type star residing in a triple-star system. It was observed during Campaign 15 of the K2 mission, and in order to confirm and characterize the system, follow-up spectroscopy and AO imaging were carried out using the FIES, HARPS, HARPS-N, and IRCS instruments. From AO imaging and Gaia data we identify two M-dwarf companions at a separation of 113 ± 2 and 2467+−177155 au. From radial velocities, K2 photometry, and stellar characterization of the host star, we find the inner planet to be a mini-Neptune with a radius of 3.06 ± 0.16 R and an orbital period of P = 9.2 d. The radius of the mini-Neptune suggests that the planet is located above the radius valley, and with an incident flux of F ∼ 400 F, it lies safely outside the super-Earth desert. The outer warm Jupiter has a mass of 0.774 ± 0.047 MJ and a radius of 1.006 ± 0.050 RJ, and orbits the host star every 48.4 d on an orbit with an eccentricity e < 0.241. Its mild eccentricity and mini-Neptune sibling suggest that the warm Jupiter originates from in situ formation or disc migration.",

keywords = "Planets, Planets and satellites: detection, Planets and satellites: formation, Planets and satellites: individual: K2-290, Satellites: individual: EPIC 249624646",

author = "M. Hjorth and Justesen, {A. B.} and T. Hirano and S. Albrecht and D. Gandolfi and F. Dai and R. Alonso and O. Barrag{\'a}n and M. Esposito and M. Kuzuhara and Lam, {K. W.F.} and Livingston, {J. H.} and P. Montanes-Rodriguez and N. Narita and G. Nowak and J. Prieto-Arranz and S. Redfield and F. Rodler and {Van Eylen}, V. and Winn, {J. N.} and G. Antoniciello and J. Cabrera and Cochran, {W. D.} and Sz Csizmadia and {De Leon}, J. and H. Deeg and Ph Eigm{\"u}ller and M. Endl and A. Erikson and M. Fridlund and S. Grziwa and E. Guenther and Hatzes, {A. P.} and P. Heeren and D. Hidalgo and J. Korth and R. Luque and D. Nespral and E. Palle and M. P{\"a}tzold and Persson, {C. M.} and H. Rauer and Smith, {A. M.S.} and T. Trifonov",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s)",

year = "2019",

month = apr,

day = "11",

doi = "10.1093/mnras/stz139",

language = "English (US)",

volume = "484",

pages = "3522--3536",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Hjorth, M, Justesen, AB, Hirano, T, Albrecht, S, Gandolfi, D, Dai, F, Alonso, R, Barragán, O, Esposito, M, Kuzuhara, M, Lam, KWF, Livingston, JH, Montanes-Rodriguez, P, Narita, N, Nowak, G, Prieto-Arranz, J, Redfield, S, Rodler, F, Van Eylen, V, Winn, JN, Antoniciello, G, Cabrera, J, Cochran, WD, Csizmadia, S, De Leon, J, Deeg, H, Eigmüller, P, Endl, M, Erikson, A, Fridlund, M, Grziwa, S, Guenther, E, Hatzes, AP, Heeren, P, Hidalgo, D, Korth, J, Luque, R, Nespral, D, Palle, E, Pätzold, M, Persson, CM, Rauer, H, Smith, AMS & Trifonov, T 2019, 'K2-290: A warm Jupiter and a mini-Neptune in a triple-star system', Monthly Notices of the Royal Astronomical Society, vol. 484, no. 3, pp. 3522-3536. https://doi.org/10.1093/mnras/stz139

TY - JOUR

T1 - K2-290

T2 - A warm Jupiter and a mini-Neptune in a triple-star system

AU - Hjorth, M.

AU - Justesen, A. B.

AU - Hirano, T.

AU - Albrecht, S.

AU - Gandolfi, D.

AU - Dai, F.

AU - Alonso, R.

AU - Barragán, O.

AU - Esposito, M.

AU - Kuzuhara, M.

AU - Lam, K. W.F.

AU - Livingston, J. H.

AU - Montanes-Rodriguez, P.

AU - Narita, N.

AU - Nowak, G.

AU - Prieto-Arranz, J.

AU - Redfield, S.

AU - Rodler, F.

AU - Van Eylen, V.

AU - Winn, J. N.

AU - Antoniciello, G.

AU - Cabrera, J.

AU - Cochran, W. D.

AU - Csizmadia, Sz

AU - De Leon, J.

AU - Deeg, H.

AU - Eigmüller, Ph

AU - Endl, M.

AU - Erikson, A.

AU - Fridlund, M.

AU - Grziwa, S.

AU - Guenther, E.

AU - Hatzes, A. P.

AU - Heeren, P.

AU - Hidalgo, D.

AU - Korth, J.

AU - Luque, R.

AU - Nespral, D.

AU - Palle, E.

AU - Pätzold, M.

AU - Persson, C. M.

AU - Rauer, H.

AU - Smith, A. M.S.

AU - Trifonov, T.

PY - 2019/4/11

Y1 - 2019/4/11

N2 - We report the discovery of two transiting planets orbiting K2-290 (EPIC 249624646), a bright (V = 11.11) late F-type star residing in a triple-star system. It was observed during Campaign 15 of the K2 mission, and in order to confirm and characterize the system, follow-up spectroscopy and AO imaging were carried out using the FIES, HARPS, HARPS-N, and IRCS instruments. From AO imaging and Gaia data we identify two M-dwarf companions at a separation of 113 ± 2 and 2467+−177155 au. From radial velocities, K2 photometry, and stellar characterization of the host star, we find the inner planet to be a mini-Neptune with a radius of 3.06 ± 0.16 R and an orbital period of P = 9.2 d. The radius of the mini-Neptune suggests that the planet is located above the radius valley, and with an incident flux of F ∼ 400 F, it lies safely outside the super-Earth desert. The outer warm Jupiter has a mass of 0.774 ± 0.047 MJ and a radius of 1.006 ± 0.050 RJ, and orbits the host star every 48.4 d on an orbit with an eccentricity e < 0.241. Its mild eccentricity and mini-Neptune sibling suggest that the warm Jupiter originates from in situ formation or disc migration.

AB - We report the discovery of two transiting planets orbiting K2-290 (EPIC 249624646), a bright (V = 11.11) late F-type star residing in a triple-star system. It was observed during Campaign 15 of the K2 mission, and in order to confirm and characterize the system, follow-up spectroscopy and AO imaging were carried out using the FIES, HARPS, HARPS-N, and IRCS instruments. From AO imaging and Gaia data we identify two M-dwarf companions at a separation of 113 ± 2 and 2467+−177155 au. From radial velocities, K2 photometry, and stellar characterization of the host star, we find the inner planet to be a mini-Neptune with a radius of 3.06 ± 0.16 R and an orbital period of P = 9.2 d. The radius of the mini-Neptune suggests that the planet is located above the radius valley, and with an incident flux of F ∼ 400 F, it lies safely outside the super-Earth desert. The outer warm Jupiter has a mass of 0.774 ± 0.047 MJ and a radius of 1.006 ± 0.050 RJ, and orbits the host star every 48.4 d on an orbit with an eccentricity e < 0.241. Its mild eccentricity and mini-Neptune sibling suggest that the warm Jupiter originates from in situ formation or disc migration.

KW - Planets

KW - Planets and satellites: detection

KW - Planets and satellites: formation

KW - Planets and satellites: individual: K2-290

KW - Satellites: individual: EPIC 249624646

UR - http://www.scopus.com/inward/record.url?scp=85067056184&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85067056184&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz139

DO - 10.1093/mnras/stz139

M3 - Article

AN - SCOPUS:85067056184

SN - 0035-8711

VL - 484

SP - 3522

EP - 3536

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

K2-290: A warm Jupiter and a mini-Neptune in a triple-star system

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