WFRF:(Nespral D.)
Search: WFRF:(Nespral D.) > Super-Earth of 8 Me...
- 4 of 38
- Previous record
- Next record
- To hitlist
- Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology (author)
Super-Earth of 8 Mearth in a 2.2-day orbit around the K5V star K2-216
- Article/chapterEnglish2018
Publisher, publication year, extent ...
- 2018-10-10
- EDP Sciences,2018
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:research.chalmers.se:97fdb929-51ee-4e14-9317-9bf4a55ebe26
- https://doi.org/10.1051/0004-6361/201832867DOI
- https://research.chalmers.se/publication/505329URI
- https://research.chalmers.se/publication/505746URI
- https://research.chalmers.se/publication/506292URI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- 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. Our aim was to confirm the detection and derive the main physical characteristics of K2-216b, including the mass. We performed a series of follow-up observations: high resolution imaging with the FastCam camera at the TCS, the Infrared Camera and Spectrograph at Subaru, and high resolution spectroscopy with HARPS (ESO, La Silla), HARPS-N (TNG), and FIES (NOT). The stellar spectra were analyzed with the SpecMatch-Emp and SME codes to derive the stellar fundamental properties. We analyzed the K2 light curve with the Pyaneti software. The radial-velocity measurements were modelled with both a Gaussian process (GP) regression and the floating chunk offset (FCO) technique to simultaneously model the planetary signal and correlated noise associated with stellar activity. 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 Msun and radius 0.72+/-0.03 Rsun. Planet b is found to have a radius of 1.75+0.17-0.10 Rearth and a 2.17-day orbit in agreement with previous results. We find consistent results for the planet mass from both models: 7.4+/-2.2 Mearth from the GP regression, and 8.0+/-1.6 Mearth from the FCO technique, which implies that this planet is a super-Earth. 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.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- Stars: individual: K2-216
- Planets and satellites: Atmospheres
- Techniques: photometric
- Techniques: radial velocities
- Planetary systems
- Planets and satellites: composition
Added entries (persons, corporate bodies, meetings, titles ...)
- Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
- Barragan, O. (author)
- Dai, F. (author)
- Gandolfi, D. (author)
- Hatzes, A. P. (author)
- Hirano, T. (author)
- Grziwa, S. (author)
- Korth, J. (author)
- Prieto-Arranz, J. (author)
- Fossati, L. (author)
- Van Eylen, V. (author)
- Justesen, A. Bo (author)
- Livingston, J. (author)
- Kubyshkina, D. (author)
- Deeg, H. J. (author)
- Guenther, E. W. (author)
- Nowak, G. (author)
- Cabrera, J. (author)
- Eigmüller, Ph (author)
- Csizmadia, Sz. (author)
- Smith, A. M. S. (author)
- Erikson, A. (author)
- Albrecht, S. (author)
- Alonso, R. (author)
- Cochran, W. D. (author)
- Endl, M. (author)
- Esposito, M. (author)
- Fukui, A. (author)
- Heeren, P. (author)
- Hidalgo, D. (author)
- Hjorth, M. (author)
- Kuzuhara, M. (author)
- Narita, N. (author)
- Nespral, D. (author)
- Palle, E. (author)
- Pätzold, M. (author)
- Rauer, H. (author)
- Rodler, F. (author)
- Winn, J. N. (author)
- Chalmers tekniska högskola (creator_code:org_t)
Related titles
- In:Astronomy and Astrophysics: EDP Sciences618:330004-63611432-0746
Internet link
- https://research.chalmers.se/publication/506292/file/506292_Fulltext.pdfFULLTEXT
- https://www.aanda.org/articles/aa/pdf/2018/10/aa32867-18.pdf
- https://doi.org/10.1051/0004-6361/201832867
- https://research.chalmers.se/publication/505329
- https://research.chalmers.se/publication/505746
- https://research.chalmers.se/publication/506292
Find in a library
- Astronomy and Astrophysics (Search for host publication in LIBRIS)
To the university's database
- 4 of 38
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Persson, Carina, ...
- Fridlund, Malcol ...
- Barragan, O.
- Dai, F.
- Gandolfi, D.
- Hatzes, A. P.
- show more...
- Hirano, T.
- Grziwa, S.
- Korth, J.
- Prieto-Arranz, J ...
- Fossati, L.
- Van Eylen, V.
- Justesen, A. Bo
- Livingston, J.
- Kubyshkina, D.
- Deeg, H. J.
- Guenther, E. W.
- Nowak, G.
- Cabrera, J.
- Eigmüller, Ph
- Csizmadia, Sz.
- Smith, A. M. S.
- Erikson, A.
- Albrecht, S.
- Alonso, R.
- Cochran, W. D.
- Endl, M.
- Esposito, M.
- Fukui, A.
- Heeren, P.
- Hidalgo, D.
- Hjorth, M.
- Kuzuhara, M.
- Narita, N.
- Nespral, D.
- Palle, E.
- Pätzold, M.
- Rauer, H.
- Rodler, F.
- Winn, J. N.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
- Articles in the publication
- Astronomy and As ...
- By the university
- Chalmers University of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
