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  • Souto, D.Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.,National Observatory Brazil (author)

Chemical Abundances of M-Dwarfs from the Apogee Survey. I. The Exoplanet Hosting Stars Kepler-138 and Kepler-186

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • 2017-01-31
  • Institute of Physics Publishing (IOPP),2017
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:mau-65215
  • https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-65215URI
  • https://doi.org/10.3847/1538-4357/835/2/239DOI
  • https://lup.lub.lu.se/record/2a8720e8-720f-454e-b3ea-63622364887aURI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • We report the first detailed chemical abundance analysis of the exoplanet-hosting M-dwarf stars Kepler-138 and Kepler-186 from the analysis of high-resolution (R similar to 22,500) H-band spectra from the SDSS-IV-APOGEE survey. Chemical abundances of 13 elements-C, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, and Fe-are extracted from the APOGEE spectra of these early M-dwarfs via spectrum syntheses computed with an improved line list that takes into account H2O and FeH lines. This paper demonstrates that APOGEE spectra can be analyzed to determine detailed chemical compositions of M-dwarfs. Both exoplanet-hosting M-dwarfs display modest sub-solar metallicities: [Fe/H](Kepler-138) = -0.09 +/- 0.09 dex and [Fe/H](Kepler-186) = -0.08 +/- 0.10 dex. The measured metallicities resulting from this high-resolution analysis are found to be higher by similar to 0.1-0.2 dex than previous estimates from lower-resolution spectra. The C/O ratios obtained for the two planet-hosting stars are near-solar, with values of 0.55 +/- 0.10 for Kepler-138 and 0.52 +/- 0.12 for Kepler-186. Kepler-186 exhibits a marginally enhanced [Si/Fe] ratio.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Cunha, K.Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.;Univ Arizona, Tucson, AZ 85719 USA.,National Observatory Brazil,University of Arizona (author)
  • Garcia-Hernandez, D. A.IAC, Via Lactea S-N, E-38205 Tenerife, Spain.;ULL, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias,University of La Laguna (ULL) (author)
  • Zamora, O.IAC, Via Lactea S-N, E-38205 Tenerife, Spain.;ULL, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias,University of La Laguna (ULL) (author)
  • Allende Prieto, C.IAC, Via Lactea S-N, E-38205 Tenerife, Spain.;ULL, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias,University of La Laguna (ULL) (author)
  • Smith, V. V.Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory (author)
  • Mahadevan, S.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.;Penn State Univ, Ctr Exoplanets & Habitable Worlds, University Pk, PA 16802 USA.,Pennsylvania State University,University of Texas at Austin (author)
  • Blake, C.Lund University,Lunds universitet,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,University of Pennsylvania(Swepub:lu)biol-cab (author)
  • Johnson, J. A.Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University (author)
  • Jönsson, HenrikIAC, Via Lactea S-N, E-38205 Tenerife, Spain.;ULL, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias(Swepub:lu)astr-hkj (author)
  • Pinsonneault, M.Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University (author)
  • Holtzman, J.New Mexico State Univ, Las Cruces, NM 88003 USA.,New Mexico State University(Swepub:lu)jo6205ho (author)
  • Majewski, S. R.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia,Liverpool John Moores University (author)
  • Shetrone, M.Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA. (author)
  • Teske, J.Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA.,Carnegie Institution for Science (author)
  • Nidever, D.Univ Michigan, Dept Astron, Ann Arbor, MI 48104 USA.;Large Synopt Survey Telescope, 950 North Cherry Ave, Tucson, AZ 85719 USA.;Steward Observ, 933 North Cherry Ave, Tucson, AZ 85719 USA.,University of Michigan,University of Arizona (author)
  • Schiavon, R.Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England. (author)
  • Sobeck, J.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia (author)
  • Garcia Perez, A. E.IAC, Via Lactea S-N, E-38205 Tenerife, Spain.;ULL, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias (author)
  • Gomez Maqueo Chew, Y.Univ Nacl Autonoma Mexico, Inst Astron, Ciudad Univ, Ciudad De Mexico 04510, DF, Mexico.,National Autonomous University of Mexico (author)
  • Stassun, K.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.,Vanderbilt University (author)
  • Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.National Observatory Brazil (creator_code:org_t)

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  • In:Astrophysical Journal: Institute of Physics Publishing (IOPP)835:20004-637X1538-4357

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