K2-141 b: A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h

O. Barragán; D. Gandolfi; F. Dai; J. Livingston; C. M. Persson; T. Hirano; N. Narita; Sz Csizmadia; J. N. Winn; D. Nespral; J. Prieto-Arranz; A. M.S. Smith; G. Nowak; S. Albrecht; G. Antoniciello; A. Bo Justesen; J. Cabrera; W. D. Cochran; H. Deeg; Ph Eigmuller; M. Endl; A. Erikson; M. Fridlund; A. Fukui; S. Grziwa; E. Guenther; A. P. Hatzes; D. Hidalgo; M. C. Johnson; J. Korth; E. Palle; M. Patzold; H. Rauer; Y. Tanaka; V. Van Eylen

doi:10.1051/0004-6361/201732217

K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h

O. Barragán
, D. Gandolfi
, F. Dai
, J. Livingston
, C. M. Persson
, T. Hirano
, N. Narita
, Sz Csizmadia
, J. N. Winn
, D. Nespral
, J. Prieto-Arranz
, A. M.S. Smith
, G. Nowak
, S. Albrecht
, G. Antoniciello
, A. Bo Justesen
, J. Cabrera
, W. D. Cochran
, H. Deeg
, Ph Eigmuller

M. Endl, A. Erikson, M. Fridlund, A. Fukui, S. Grziwa, E. Guenther, A. P. Hatzes, D. Hidalgo, M. C. Johnson, J. Korth, E. Palle, M. Patzold, H. Rauer, Y. Tanaka, V. Van Eylen

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M_⊗ and radius of 1.54_-0.09^+0.10 R_⊗, yielding a mean density of 8.00_-1.45^+1.83 g cm^-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

Original language	English (US)
Article number	A95
Journal	Astronomy and Astrophysics
Volume	612
DOIs	https://doi.org/10.1051/0004-6361/201732217
State	Published - Apr 1 2018

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planets and satellites: individual: EPIC 246393474 b
Stars: fundamental parameters
Stars: individual: EPIC 246393474
Techniques: photometric
Techniques: radial velocities

Access to Document

10.1051/0004-6361/201732217

Cite this

Barragán, O., Gandolfi, D., Dai, F., Livingston, J., Persson, C. M., Hirano, T., Narita, N., Csizmadia, S., Winn, J. N., Nespral, D., Prieto-Arranz, J., Smith, A. M. S., Nowak, G., Albrecht, S., Antoniciello, G., Bo Justesen, A., Cabrera, J., Cochran, W. D., Deeg, H., ... Van Eylen, V. (2018). K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h. Astronomy and Astrophysics, 612, Article A95. https://doi.org/10.1051/0004-6361/201732217

@article{96d79d4d3b314874952a4bca0236f609,

title = "K2-141 b: A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h",

abstract = "We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70\% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.",

keywords = "Planetary systems, Planets and satellites: individual: EPIC 246393474 b, Stars: fundamental parameters, Stars: individual: EPIC 246393474, Techniques: photometric, Techniques: radial velocities",

author = "O. Barrag{\'a}n and D. Gandolfi and F. Dai and J. Livingston and Persson, \{C. M.\} and T. Hirano and N. Narita and Sz Csizmadia and Winn, \{J. N.\} and D. Nespral and J. Prieto-Arranz and Smith, \{A. M.S.\} and G. Nowak and S. Albrecht and G. Antoniciello and \{Bo Justesen\}, A. and J. Cabrera and Cochran, \{W. D.\} and H. Deeg and Ph Eigmuller and M. Endl and A. Erikson and M. Fridlund and A. Fukui and S. Grziwa and E. Guenther and Hatzes, \{A. P.\} and D. Hidalgo and Johnson, \{M. C.\} and J. Korth and E. Palle and M. Patzold and H. Rauer and Y. Tanaka and \{Van Eylen\}, V.",

note = "Publisher Copyright: {\textcopyright} ESO 2018.",

year = "2018",

month = apr,

day = "1",

doi = "10.1051/0004-6361/201732217",

language = "English (US)",

volume = "612",

journal = "Astronomy and Astrophysics",

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Barragán, O, Gandolfi, D, Dai, F, Livingston, J, Persson, CM, Hirano, T, Narita, N, Csizmadia, S, Winn, JN, Nespral, D, Prieto-Arranz, J, Smith, AMS, Nowak, G, Albrecht, S, Antoniciello, G, Bo Justesen, A, Cabrera, J, Cochran, WD, Deeg, H, Eigmuller, P, Endl, M, Erikson, A, Fridlund, M, Fukui, A, Grziwa, S, Guenther, E, Hatzes, AP, Hidalgo, D, Johnson, MC, Korth, J, Palle, E, Patzold, M, Rauer, H, Tanaka, Y & Van Eylen, V 2018, 'K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h', Astronomy and Astrophysics, vol. 612, A95. https://doi.org/10.1051/0004-6361/201732217

TY - JOUR

T1 - K2-141 b

T2 - A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h

AU - Barragán, O.

AU - Gandolfi, D.

AU - Dai, F.

AU - Livingston, J.

AU - Persson, C. M.

AU - Hirano, T.

AU - Narita, N.

AU - Csizmadia, Sz

AU - Winn, J. N.

AU - Nespral, D.

AU - Prieto-Arranz, J.

AU - Smith, A. M.S.

AU - Nowak, G.

AU - Albrecht, S.

AU - Antoniciello, G.

AU - Bo Justesen, A.

AU - Cabrera, J.

AU - Cochran, W. D.

AU - Deeg, H.

AU - Eigmuller, Ph

AU - Endl, M.

AU - Erikson, A.

AU - Fridlund, M.

AU - Fukui, A.

AU - Grziwa, S.

AU - Guenther, E.

AU - Hatzes, A. P.

AU - Hidalgo, D.

AU - Johnson, M. C.

AU - Korth, J.

AU - Palle, E.

AU - Patzold, M.

AU - Rauer, H.

AU - Tanaka, Y.

AU - Van Eylen, V.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

AB - We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

KW - Planetary systems

KW - Planets and satellites: individual: EPIC 246393474 b

KW - Stars: fundamental parameters

KW - Stars: individual: EPIC 246393474

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - https://www.scopus.com/pages/publications/85047202705

UR - https://www.scopus.com/pages/publications/85047202705#tab=citedBy

U2 - 10.1051/0004-6361/201732217

DO - 10.1051/0004-6361/201732217

M3 - Article

AN - SCOPUS:85047202705

SN - 0004-6361

VL - 612

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A95

ER -