Aarhus University Seal / Aarhus Universitets segl

Anders Zinck Justesen

Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216. / Persson, C. M.; Fridlund, M.; Barragan, O.; Dai, F.; Gandolfi, D.; Hatzes, A. P.; Hirano, T.; Grziwa, S.; Korth, J.; Prieto-Arranz, J.; Fossati, L.; Van Eylen, V.; Justesen, A. B.; Livingston, J.; Kubyshkina, D.; Deeg, H. J.; Guenther, E. W.; Nowak, G.; Cabrera, J.; Eigmueller, Ph; Csizmadia, Sz; Smith, A. M. S.; Erikson, A.; Albrecht, S.; Alonso Sobrino, R.; Cochran, W. D.; Endl, M.; Esposito, M.; Fukui, A.; Heeren, P.; Hidalgo, D.; Hjorth, M.; Kuzuhara, M.; Narita, N.; Nespral, D.; Palle, E.; Paetzold, M.; Rauer, H.; Rodler, F.; Winn, J. N.

I: Astronomy & Astrophysics, Bind 618, 33, 10.10.2018.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Persson, CM, Fridlund, M, Barragan, O, Dai, F, Gandolfi, D, Hatzes, AP, Hirano, T, Grziwa, S, Korth, J, Prieto-Arranz, J, Fossati, L, Van Eylen, V, Justesen, AB, Livingston, J, Kubyshkina, D, Deeg, HJ, Guenther, EW, Nowak, G, Cabrera, J, Eigmueller, P, Csizmadia, S, Smith, AMS, Erikson, A, Albrecht, S, Alonso Sobrino, R, Cochran, WD, Endl, M, Esposito, M, Fukui, A, Heeren, P, Hidalgo, D, Hjorth, M, Kuzuhara, M, Narita, N, Nespral, D, Palle, E, Paetzold, M, Rauer, H, Rodler, F & Winn, JN 2018, 'Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216', Astronomy & Astrophysics, bind 618, 33. https://doi.org/10.1051/0004-6361/201832867

APA

Persson, C. M., Fridlund, M., Barragan, O., Dai, F., Gandolfi, D., Hatzes, A. P., Hirano, T., Grziwa, S., Korth, J., Prieto-Arranz, J., Fossati, L., Van Eylen, V., Justesen, A. B., Livingston, J., Kubyshkina, D., Deeg, H. J., Guenther, E. W., Nowak, G., Cabrera, J., ... Winn, J. N. (2018). Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216. Astronomy & Astrophysics, 618, [33]. https://doi.org/10.1051/0004-6361/201832867

CBE

Persson CM, Fridlund M, Barragan O, Dai F, Gandolfi D, Hatzes AP, Hirano T, Grziwa S, Korth J, Prieto-Arranz J, Fossati L, Van Eylen V, Justesen AB, Livingston J, Kubyshkina D, Deeg HJ, Guenther EW, Nowak G, Cabrera J, Eigmueller P, Csizmadia S, Smith AMS, Erikson A, Albrecht S, Alonso Sobrino R, Cochran WD, Endl M, Esposito M, Fukui A, Heeren P, Hidalgo D, Hjorth M, Kuzuhara M, Narita N, Nespral D, Palle E, Paetzold M, Rauer H, Rodler F, Winn JN. 2018. Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216. Astronomy & Astrophysics. 618:Article 33. https://doi.org/10.1051/0004-6361/201832867

MLA

Vancouver

Persson CM, Fridlund M, Barragan O, Dai F, Gandolfi D, Hatzes AP o.a. Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216. Astronomy & Astrophysics. 2018 okt 10;618. 33. https://doi.org/10.1051/0004-6361/201832867

Author

Persson, C. M. ; Fridlund, M. ; Barragan, O. ; Dai, F. ; Gandolfi, D. ; Hatzes, A. P. ; Hirano, T. ; Grziwa, S. ; Korth, J. ; Prieto-Arranz, J. ; Fossati, L. ; Van Eylen, V. ; Justesen, A. B. ; Livingston, J. ; Kubyshkina, D. ; Deeg, H. J. ; Guenther, E. W. ; Nowak, G. ; Cabrera, J. ; Eigmueller, Ph ; Csizmadia, Sz ; Smith, A. M. S. ; Erikson, A. ; Albrecht, S. ; Alonso Sobrino, R. ; Cochran, W. D. ; Endl, M. ; Esposito, M. ; Fukui, A. ; Heeren, P. ; Hidalgo, D. ; Hjorth, M. ; Kuzuhara, M. ; Narita, N. ; Nespral, D. ; Palle, E. ; Paetzold, M. ; Rauer, H. ; Rodler, F. ; Winn, J. N. / Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216. I: Astronomy & Astrophysics. 2018 ; Bind 618.

Bibtex

@article{15df4447bbd44056b805eae767f4fe13,
title = "Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216",
abstract = "Context. Although thousands of exoplanets have been discovered to date, far fewer have been fully characterised, in particular super-Earths. The KESPRINT consortium identified K2-216 as a planetary candidate host star in the K2 space mission Campaign 8 field with a transiting super-Earth. The planet has recently been validated as well.Aims. Our aim was to confirm the detection and derive the main physical characteristics of K2-216b, including the mass.Methods. We performed a series of follow-up observations: high-resolution imaging with the FastCam camera at the TCS and the Infrared Camera and Spectrograph at Subaru, and high-resolution spectroscopy with HARPS (La Silla), HARPS-N (TNG), and FIES (NOT). The stellar spectra were analyzed with the SpecMatch-Emp and SME codes to derive the fundamental stellar properties. We analyzed the K2 light curve with the pyanet i software. The radial velocity measurements were modelled with both a Gaussian process (GP) regression and the so-called floating chunk offset (FCO) technique to simultaneously model the planetary signal and correlated noise associated with stellar activity.Results. Imaging confirms that K2-216 is a single star. Our analysis discloses that the star is a moderately active K5V star of mass 0.70 +/- 0.03 M-circle dot and radius 0.72 +/- 0.03 R-circle dot. Planet b is found to have a radius of 1.75(-0.10)(+0.17) R-circle plus and a 2.17-day orbit in agreement with previous results. We find consistent results for the planet mass from both models: M-p approximate to 7.4 +/- 2.2 M-circle plus from the GP regression and M-p approximate to 8.0 +/- 1.6 M-circle plus from the FCO technique, which implies that this planet is a super-Earth. The incident stellar flux is 248(-48)(+220) F-circle plus.Conclusions. The planet parameters put planet b in the middle of, or just below, the gap of the radius distribution of small planets. The density is consistent with a rocky composition of primarily iron and magnesium silicate. In agreement with theoretical predictions, we find that the planet is a remnant core, stripped of its atmosphere, and is one of the largest planets found that has lost its atmosphere.",
keywords = "planetary systems, stars: individual: K2-216, techniques: photometric, techniques: radial velocities, planets and satellites: atmospheres, planets and satellites: composition, LOW-MASS STARS, TRANSITING EXTRASOLAR PLANETS, COOL DWARF STARS, LIGHT CURVES, BALMER LINES, K2 MISSION, STELLAR, SPECTROGRAPH, KEPLER, COMPANIONS",
author = "Persson, {C. M.} and M. Fridlund and O. Barragan and F. Dai and D. Gandolfi and Hatzes, {A. P.} and T. Hirano and S. Grziwa and J. Korth and J. Prieto-Arranz and L. Fossati and {Van Eylen}, V. and Justesen, {A. B.} and J. Livingston and D. Kubyshkina and Deeg, {H. J.} and Guenther, {E. W.} and G. Nowak and J. Cabrera and Ph Eigmueller and Sz Csizmadia and Smith, {A. M. S.} and A. Erikson and S. Albrecht and {Alonso Sobrino}, R. and Cochran, {W. D.} and M. Endl and M. Esposito and A. Fukui and P. Heeren and D. Hidalgo and M. Hjorth and M. Kuzuhara and N. Narita and D. Nespral and E. Palle and M. Paetzold and H. Rauer and F. Rodler and Winn, {J. N.}",
year = "2018",
month = oct,
day = "10",
doi = "10.1051/0004-6361/201832867",
language = "English",
volume = "618",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Super-Earth of 8 M-circle plus in a 2.2-day orbit around the K5V star K2-216

AU - Persson, C. M.

AU - Fridlund, M.

AU - Barragan, O.

AU - Dai, F.

AU - Gandolfi, D.

AU - Hatzes, A. P.

AU - Hirano, T.

AU - Grziwa, S.

AU - Korth, J.

AU - Prieto-Arranz, J.

AU - Fossati, L.

AU - Van Eylen, V.

AU - Justesen, A. B.

AU - Livingston, J.

AU - Kubyshkina, D.

AU - Deeg, H. J.

AU - Guenther, E. W.

AU - Nowak, G.

AU - Cabrera, J.

AU - Eigmueller, Ph

AU - Csizmadia, Sz

AU - Smith, A. M. S.

AU - Erikson, A.

AU - Albrecht, S.

AU - Alonso Sobrino, R.

AU - Cochran, W. D.

AU - Endl, M.

AU - Esposito, M.

AU - Fukui, A.

AU - Heeren, P.

AU - Hidalgo, D.

AU - Hjorth, M.

AU - Kuzuhara, M.

AU - Narita, N.

AU - Nespral, D.

AU - Palle, E.

AU - Paetzold, M.

AU - Rauer, H.

AU - Rodler, F.

AU - Winn, J. N.

PY - 2018/10/10

Y1 - 2018/10/10

N2 - Context. Although thousands of exoplanets have been discovered to date, far fewer have been fully characterised, in particular super-Earths. The KESPRINT consortium identified K2-216 as a planetary candidate host star in the K2 space mission Campaign 8 field with a transiting super-Earth. The planet has recently been validated as well.Aims. Our aim was to confirm the detection and derive the main physical characteristics of K2-216b, including the mass.Methods. We performed a series of follow-up observations: high-resolution imaging with the FastCam camera at the TCS and the Infrared Camera and Spectrograph at Subaru, and high-resolution spectroscopy with HARPS (La Silla), HARPS-N (TNG), and FIES (NOT). The stellar spectra were analyzed with the SpecMatch-Emp and SME codes to derive the fundamental stellar properties. We analyzed the K2 light curve with the pyanet i software. The radial velocity measurements were modelled with both a Gaussian process (GP) regression and the so-called floating chunk offset (FCO) technique to simultaneously model the planetary signal and correlated noise associated with stellar activity.Results. Imaging confirms that K2-216 is a single star. Our analysis discloses that the star is a moderately active K5V star of mass 0.70 +/- 0.03 M-circle dot and radius 0.72 +/- 0.03 R-circle dot. Planet b is found to have a radius of 1.75(-0.10)(+0.17) R-circle plus and a 2.17-day orbit in agreement with previous results. We find consistent results for the planet mass from both models: M-p approximate to 7.4 +/- 2.2 M-circle plus from the GP regression and M-p approximate to 8.0 +/- 1.6 M-circle plus from the FCO technique, which implies that this planet is a super-Earth. The incident stellar flux is 248(-48)(+220) F-circle plus.Conclusions. The planet parameters put planet b in the middle of, or just below, the gap of the radius distribution of small planets. The density is consistent with a rocky composition of primarily iron and magnesium silicate. In agreement with theoretical predictions, we find that the planet is a remnant core, stripped of its atmosphere, and is one of the largest planets found that has lost its atmosphere.

AB - Context. Although thousands of exoplanets have been discovered to date, far fewer have been fully characterised, in particular super-Earths. The KESPRINT consortium identified K2-216 as a planetary candidate host star in the K2 space mission Campaign 8 field with a transiting super-Earth. The planet has recently been validated as well.Aims. Our aim was to confirm the detection and derive the main physical characteristics of K2-216b, including the mass.Methods. We performed a series of follow-up observations: high-resolution imaging with the FastCam camera at the TCS and the Infrared Camera and Spectrograph at Subaru, and high-resolution spectroscopy with HARPS (La Silla), HARPS-N (TNG), and FIES (NOT). The stellar spectra were analyzed with the SpecMatch-Emp and SME codes to derive the fundamental stellar properties. We analyzed the K2 light curve with the pyanet i software. The radial velocity measurements were modelled with both a Gaussian process (GP) regression and the so-called floating chunk offset (FCO) technique to simultaneously model the planetary signal and correlated noise associated with stellar activity.Results. Imaging confirms that K2-216 is a single star. Our analysis discloses that the star is a moderately active K5V star of mass 0.70 +/- 0.03 M-circle dot and radius 0.72 +/- 0.03 R-circle dot. Planet b is found to have a radius of 1.75(-0.10)(+0.17) R-circle plus and a 2.17-day orbit in agreement with previous results. We find consistent results for the planet mass from both models: M-p approximate to 7.4 +/- 2.2 M-circle plus from the GP regression and M-p approximate to 8.0 +/- 1.6 M-circle plus from the FCO technique, which implies that this planet is a super-Earth. The incident stellar flux is 248(-48)(+220) F-circle plus.Conclusions. The planet parameters put planet b in the middle of, or just below, the gap of the radius distribution of small planets. The density is consistent with a rocky composition of primarily iron and magnesium silicate. In agreement with theoretical predictions, we find that the planet is a remnant core, stripped of its atmosphere, and is one of the largest planets found that has lost its atmosphere.

KW - planetary systems

KW - stars: individual: K2-216

KW - techniques: photometric

KW - techniques: radial velocities

KW - planets and satellites: atmospheres

KW - planets and satellites: composition

KW - LOW-MASS STARS

KW - TRANSITING EXTRASOLAR PLANETS

KW - COOL DWARF STARS

KW - LIGHT CURVES

KW - BALMER LINES

KW - K2 MISSION

KW - STELLAR

KW - SPECTROGRAPH

KW - KEPLER

KW - COMPANIONS

U2 - 10.1051/0004-6361/201832867

DO - 10.1051/0004-6361/201832867

M3 - Journal article

VL - 618

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - 33

ER -