Search: id:"swepub:oai:research.chalmers.se:31741ad0-be2c-4844-b93a-41fd95ae58a5" >
K2-155: A Bright Me...
K2-155: A Bright Metal-poor M Dwarf with Three Transiting Super-Earths
-
Hirano, T. (author)
-
- Dai, Fei (author)
- Massachusetts Institute of Technology (MIT),Princeton University
-
- Livingston, J.H. (author)
- University of Tokyo, Japan
-
show more...
-
- Fujii, Yuka (author)
- Tokyo Institute of Technology
-
- Cochran, William D. (author)
- The University of Texas at Austin, USA
-
- Endl, M. (author)
- The University of Texas at Austin, USA
-
- Gandolfi, D. (author)
- Universita degli Studi di Torino,University of Turin
-
- Redfield, S. (author)
- Wesleyan University
-
- Joshua, N. (author)
- Princeton University
-
- Guenther, E. W. (author)
- Thüringer Landessternwarte Tautenburg
-
- Prieto-Arranz, J. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
-
- Albrecht, Simon (author)
- Århus Universitet,Aarhus University
-
- Barragán, O. (author)
- Universita degli Studi di Torino,University of Turin
-
- Cabrera, J. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Cauley, P.W. (author)
- Arizona State University
-
- Csizmadia, Szilard (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Deeg, H. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
-
- Eigmüller, P. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Erikson, Anders (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Fridlund, Malcolm, 1952 (author)
- Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology
-
- Fukui, A. (author)
- National Astronomical Observatory of Japan
-
- Grziwa, S. (author)
- Universität zu Köln,University of Cologne
-
- Hatzes, A. (author)
- Thüringer Landessternwarte Tautenburg
-
- Korth, Judith (author)
- Universität zu Köln,University of Cologne
-
- Narita, Norio (author)
- University of Tokyo, Japan,National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS)
-
- Nespral, David (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
-
- Niraula, Prajwal (author)
- Wesleyan University
-
- Nowak, G. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
-
- Pätzold, Martin (author)
- Universität zu Köln,University of Cologne
-
- Palle, Enric (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
-
- Persson, Carina, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Rauer, H. (author)
- Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Ribas, I. (author)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC
-
- Smith, Alexis M. S. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
-
- Van Eylen, V. (author)
- Universiteit Leiden (UL),Leiden University (UL)
-
show less...
-
(creator_code:org_t)
- 2018-02-23
- 2018
- English.
-
In: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 155:3
- Related links:
-
https://research.cha... (primary) (free)
-
show more...
-
https://research.cha...
-
https://research.cha...
-
https://doi.org/10.3...
-
https://research.cha...
-
https://research.cha...
-
show less...
Abstract
Subject headings
Close
- We report on the discovery of three transiting super-Earths around K2-155 (EPIC 210897587), a relatively bright early M dwarf (V = 12.81 mag) observed during Campaign 13 of the NASA K2 mission. To characterize the system and validate the planet candidates, we conducted speckle imaging and high-dispersion optical spectroscopy, including radial velocity measurements. Based on the K2 light curve and the spectroscopic characterization of the host star, the planet sizes and orbital periods are 1.55 -0.17 +0.20 R ⊕ and 6.34365 ±0.00028 days for the inner planet; 1.95 -0.22 +0.27 R ⊕ and 13.85402 ±0.00088 days for the middle planet; and 1.64 -0.17 +0.18 R ⊕ and 40.6835 ±0.0031 days for the outer planet. The outer planet (K2-155d) is near the habitable zone, with an insolation 1.67 ±0.38 times that of the Earth. The planet's radius falls within the range between that of smaller rocky planets and larger gas-rich planets. To assess the habitability of this planet, we present a series of three-dimensional global climate simulations, assuming that K2-155d is tidally locked and has an Earth-like composition and atmosphere. We find that the planet can maintain a moderate surface temperature if the insolation proves to be smaller than ∼1.5 times that of the Earth. Doppler mass measurements, transit spectroscopy, and other follow-up observations should be rewarding, as K2-155 is one of the optically brightest M dwarfs known to harbor transiting planets.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- techniques: radial velocities
- techniques: photometric
- techniques: spectroscopic
- stars: individual (K2-155 = EPIC 210897587)
- planets and satellites: detection
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
-
Hirano, T.
-
Dai, Fei
-
Livingston, J.H.
-
Fujii, Yuka
-
Cochran, William ...
-
Endl, M.
-
show more...
-
Gandolfi, D.
-
Redfield, S.
-
Joshua, N.
-
Guenther, E. W.
-
Prieto-Arranz, J ...
-
Albrecht, Simon
-
Barragán, O.
-
Cabrera, J.
-
Cauley, P.W.
-
Csizmadia, Szila ...
-
Deeg, H.
-
Eigmüller, P.
-
Erikson, Anders
-
Fridlund, Malcol ...
-
Fukui, A.
-
Grziwa, S.
-
Hatzes, A.
-
Korth, Judith
-
Narita, Norio
-
Nespral, David
-
Niraula, Prajwal
-
Nowak, G.
-
Pätzold, Martin
-
Palle, Enric
-
Persson, Carina, ...
-
Rauer, H.
-
Ribas, I.
-
Smith, Alexis M. ...
-
Van Eylen, V.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Meteorology and ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Atom and Molecul ...
- Articles in the publication
-
Astronomical Jou ...
- By the university
-
Chalmers University of Technology