K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission

J. Korth; Sz Csizmadia; D. Gandolfi; M. Fridlund; M. Pätzold; T. Hirano; J. Livingston; C. M. Persson; H. J. Deeg; A. B. Justesen; O. Barragán; S. Grziwa; M. Endl; R. Tronsgaard; F. Dai; W. D. Cochran; S. Albrecht; R. Alonso; J. Cabrera; P. W. Cauley; F. Cusano; Ph Eigmüller; A. Erikson; M. Esposito; E. W. Guenther; A. P. Hatzes; D. Hidalgo; M. Kuzuhara; P. Montañes; N. R. Napolitano; N. Narita; P. Niraula; D. Nespral; G. Nowak; E. Palle; C. E. Petrillo; S. Redfield; J. Prieto-Arranz; H. Rauer; A. M.S. Smith; C. Tortora; V. Van Eylen; J. N. Winn

doi:10.1093/mnras/sty2760

K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission

J. Korth^*, Sz Csizmadia, D. Gandolfi, M. Fridlund, M. Pätzold, T. Hirano, J. Livingston, C. M. Persson, H. J. Deeg, A. B. Justesen, O. Barragán, S. Grziwa, M. Endl, R. Tronsgaard, F. Dai, W. D. Cochran, S. Albrecht, R. Alonso, J. Cabrera, P. W. CauleyF. Cusano, Ph Eigmüller, A. Erikson, M. Esposito, E. W. Guenther, A. P. Hatzes, D. Hidalgo, M. Kuzuhara, P. Montañes, N. R. Napolitano, N. Narita, P. Niraula, D. Nespral, G. Nowak, E. Palle, C. E. Petrillo, S. Redfield, J. Prieto-Arranz, H. Rauer, A. M.S. Smith, C. Tortora, V. Van Eylen, J. N. Winn

^*Corresponding author af dette arbejde

Institut for Fysik og Astronomi - Stellar Astrophysics Centre

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Abstract

We report the independent discovery and characterization of two K2 planets: K2-180b, a mini-Neptune-sized planet in an 8.9-d orbit transiting a V=12.6mag, metal-poor ([Fe/H] = -0.65 ± 0.10) K2V star in K2 campaign 5; K2-140b, a transiting hot Jupiter in a 6.6-d orbit around a V=12.6mag G6V ([Fe/H] = +0.10 ± 0.10) star in K2 campaign 10. Our results are based on K2 time-series photometry combined with high-spatial resolution imaging and high-precision radial velocity measurements. We present the first mass measurement of K2-180b. K2-180b has a mass of M_p = 11.3 ± 1.9M⊕ and a radius of R_p = 2.2 ± 0.1R⊕, yielding a mean density of ρp = 5.6 ± 1.9 g cm^-3, suggesting a rocky composition. Given its radius, K2-180b is above the region of the so-called 'planetary radius gap'. K2-180b is in addition not only one of the densest mini-Neptune-sized planets, but also one of the few mini-Neptune-sized planets known to transit a metal-poor star. We also constrain the planetary and orbital parameters of K2-140b and show that, given the currently available Doppler measurements, the eccentricity is consistent with zero, contrary to the results of a previous study.

Originalsprog	Engelsk
Tidsskrift	Monthly Notices of the Royal Astronomical Society
Vol/bind	482
Nummer	2
Sider (fra-til)	1807-1823
Antal sider	17
ISSN	0035-8711
DOI	https://doi.org/10.1093/mnras/sty2760
Status	Udgivet - 2019

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10.1093/mnras/sty2760

https://arxiv.org/pdf/1810.04601.pdf

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Korth, J., Csizmadia, S., Gandolfi, D., Fridlund, M., Pätzold, M., Hirano, T., Livingston, J., Persson, C. M., Deeg, H. J., Justesen, A. B., Barragán, O., Grziwa, S., Endl, M., Tronsgaard, R., Dai, F., Cochran, W. D., Albrecht, S., Alonso, R., Cabrera, J., ... Winn, J. N. (2019). K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission. Monthly Notices of the Royal Astronomical Society, 482(2), 1807-1823. https://doi.org/10.1093/mnras/sty2760

@article{18cbc113e43545feaec65a1218a79fee,

title = "K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission",

abstract = "We report the independent discovery and characterization of two K2 planets: K2-180b, a mini-Neptune-sized planet in an 8.9-d orbit transiting a V=12.6mag, metal-poor ([Fe/H] = -0.65 ± 0.10) K2V star in K2 campaign 5; K2-140b, a transiting hot Jupiter in a 6.6-d orbit around a V=12.6mag G6V ([Fe/H] = +0.10 ± 0.10) star in K2 campaign 10. Our results are based on K2 time-series photometry combined with high-spatial resolution imaging and high-precision radial velocity measurements. We present the first mass measurement of K2-180b. K2-180b has a mass of Mp = 11.3 ± 1.9M⊕ and a radius of Rp = 2.2 ± 0.1R⊕, yielding a mean density of ρp = 5.6 ± 1.9 g cm-3, suggesting a rocky composition. Given its radius, K2-180b is above the region of the so-called 'planetary radius gap'. K2-180b is in addition not only one of the densest mini-Neptune-sized planets, but also one of the few mini-Neptune-sized planets known to transit a metal-poor star. We also constrain the planetary and orbital parameters of K2-140b and show that, given the currently available Doppler measurements, the eccentricity is consistent with zero, contrary to the results of a previous study.",

keywords = "Planets and satellites: fundamental parameters, Stars: fundamental parameters, Stars: individual: K2-140, Stars: individual: K2-180, Techniques: photometric, Techniques: radial velocities",

author = "J. Korth and Sz Csizmadia and D. Gandolfi and M. Fridlund and M. P{\"a}tzold and T. Hirano and J. Livingston and Persson, {C. M.} and Deeg, {H. J.} and Justesen, {A. B.} and O. Barrag{\'a}n and S. Grziwa and M. Endl and R. Tronsgaard and F. Dai and Cochran, {W. D.} and S. Albrecht and R. Alonso and J. Cabrera and Cauley, {P. W.} and F. Cusano and Ph Eigm{\"u}ller and A. Erikson and M. Esposito and Guenther, {E. W.} and Hatzes, {A. P.} and D. Hidalgo and M. Kuzuhara and P. Monta{\~n}es and Napolitano, {N. R.} and N. Narita and P. Niraula and D. Nespral and G. Nowak and E. Palle and Petrillo, {C. E.} and S. Redfield and J. Prieto-Arranz and H. Rauer and Smith, {A. M.S.} and C. Tortora and {Van Eylen}, V. and Winn, {J. N.}",

year = "2019",

doi = "10.1093/mnras/sty2760",

language = "English",

volume = "482",

pages = "1807--1823",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Korth, J, Csizmadia, S, Gandolfi, D, Fridlund, M, Pätzold, M, Hirano, T, Livingston, J, Persson, CM, Deeg, HJ, Justesen, AB, Barragán, O, Grziwa, S, Endl, M, Tronsgaard, R, Dai, F, Cochran, WD, Albrecht, S, Alonso, R, Cabrera, J, Cauley, PW, Cusano, F, Eigmüller, P, Erikson, A, Esposito, M, Guenther, EW, Hatzes, AP, Hidalgo, D, Kuzuhara, M, Montañes, P, Napolitano, NR, Narita, N, Niraula, P, Nespral, D, Nowak, G, Palle, E, Petrillo, CE, Redfield, S, Prieto-Arranz, J, Rauer, H, Smith, AMS, Tortora, C, Van Eylen, V & Winn, JN 2019, 'K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission', Monthly Notices of the Royal Astronomical Society, bind 482, nr. 2, s. 1807-1823. https://doi.org/10.1093/mnras/sty2760

TY - JOUR

T1 - K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission

AU - Korth, J.

AU - Csizmadia, Sz

AU - Gandolfi, D.

AU - Fridlund, M.

AU - Pätzold, M.

AU - Hirano, T.

AU - Livingston, J.

AU - Persson, C. M.

AU - Deeg, H. J.

AU - Justesen, A. B.

AU - Barragán, O.

AU - Grziwa, S.

AU - Endl, M.

AU - Tronsgaard, R.

AU - Dai, F.

AU - Cochran, W. D.

AU - Albrecht, S.

AU - Alonso, R.

AU - Cabrera, J.

AU - Cauley, P. W.

AU - Cusano, F.

AU - Eigmüller, Ph

AU - Erikson, A.

AU - Esposito, M.

AU - Guenther, E. W.

AU - Hatzes, A. P.

AU - Hidalgo, D.

AU - Kuzuhara, M.

AU - Montañes, P.

AU - Napolitano, N. R.

AU - Narita, N.

AU - Niraula, P.

AU - Nespral, D.

AU - Nowak, G.

AU - Palle, E.

AU - Petrillo, C. E.

AU - Redfield, S.

AU - Prieto-Arranz, J.

AU - Rauer, H.

AU - Smith, A. M.S.

AU - Tortora, C.

AU - Van Eylen, V.

AU - Winn, J. N.

PY - 2019

Y1 - 2019

N2 - We report the independent discovery and characterization of two K2 planets: K2-180b, a mini-Neptune-sized planet in an 8.9-d orbit transiting a V=12.6mag, metal-poor ([Fe/H] = -0.65 ± 0.10) K2V star in K2 campaign 5; K2-140b, a transiting hot Jupiter in a 6.6-d orbit around a V=12.6mag G6V ([Fe/H] = +0.10 ± 0.10) star in K2 campaign 10. Our results are based on K2 time-series photometry combined with high-spatial resolution imaging and high-precision radial velocity measurements. We present the first mass measurement of K2-180b. K2-180b has a mass of Mp = 11.3 ± 1.9M⊕ and a radius of Rp = 2.2 ± 0.1R⊕, yielding a mean density of ρp = 5.6 ± 1.9 g cm-3, suggesting a rocky composition. Given its radius, K2-180b is above the region of the so-called 'planetary radius gap'. K2-180b is in addition not only one of the densest mini-Neptune-sized planets, but also one of the few mini-Neptune-sized planets known to transit a metal-poor star. We also constrain the planetary and orbital parameters of K2-140b and show that, given the currently available Doppler measurements, the eccentricity is consistent with zero, contrary to the results of a previous study.

AB - We report the independent discovery and characterization of two K2 planets: K2-180b, a mini-Neptune-sized planet in an 8.9-d orbit transiting a V=12.6mag, metal-poor ([Fe/H] = -0.65 ± 0.10) K2V star in K2 campaign 5; K2-140b, a transiting hot Jupiter in a 6.6-d orbit around a V=12.6mag G6V ([Fe/H] = +0.10 ± 0.10) star in K2 campaign 10. Our results are based on K2 time-series photometry combined with high-spatial resolution imaging and high-precision radial velocity measurements. We present the first mass measurement of K2-180b. K2-180b has a mass of Mp = 11.3 ± 1.9M⊕ and a radius of Rp = 2.2 ± 0.1R⊕, yielding a mean density of ρp = 5.6 ± 1.9 g cm-3, suggesting a rocky composition. Given its radius, K2-180b is above the region of the so-called 'planetary radius gap'. K2-180b is in addition not only one of the densest mini-Neptune-sized planets, but also one of the few mini-Neptune-sized planets known to transit a metal-poor star. We also constrain the planetary and orbital parameters of K2-140b and show that, given the currently available Doppler measurements, the eccentricity is consistent with zero, contrary to the results of a previous study.

KW - Planets and satellites: fundamental parameters

KW - Stars: fundamental parameters

KW - Stars: individual: K2-140

KW - Stars: individual: K2-180

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85057187414&partnerID=8YFLogxK

U2 - 10.1093/mnras/sty2760

DO - 10.1093/mnras/sty2760

M3 - Journal article

AN - SCOPUS:85057187414

SN - 0035-8711

VL - 482

SP - 1807

EP - 1823

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission

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