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Stellar and Planeta...
Stellar and Planetary Characterization of the Ross 128 Exoplanetary System from APOGEE Spectra
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- Souto, Diogo (author)
- Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.,National Observatory Brazil
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- Unterborn, Cayman T. (author)
- Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University
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- Smith, Verne V. (author)
- Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory
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- Cunha, Katia (author)
- Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.;Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA.,National Observatory Brazil,University of Arizona
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- Teske, Johanna (author)
- Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA.;Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA.,Carnegie Observatories,Carnegie Institution for Science
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- Covey, Kevin (author)
- Western Washington Univ, Dept Phys & Astron, Bellingham, WA 98225 USA.,Western Washington University
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- Rojas-Ayala, Barbara (author)
- Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile.,Andrés Bello National University
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- Garcia-Hernandez, D. A. (author)
- Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias
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- Stassun, Keivan (author)
- Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA.;Fisk Univ, Dept Phys, 1000 17th Ave N, Nashville, TN 37208 USA.,Fisk University,Vanderbilt University
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- Zamora, Olga (author)
- Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias,University of La Laguna (ULL)
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- Masseron, Thomas (author)
- Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias
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- Johnson, J. A. (author)
- Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University
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- Majewski, Steven R. (author)
- Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia
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- Jönsson, Henrik (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Gilhool, Steven (author)
- Univ Penn, Dept Phys & Astron, 209 S 33rd St, Philadelphia, PA 19104 USA.,University of Pennsylvania
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- Blake, Cullen (author)
- Univ Penn, Dept Phys & Astron, 209 S 33rd St, Philadelphia, PA 19104 USA.,University of Pennsylvania
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- Santana, Felipe (author)
- Univ Chile, Av Libertador Bernardo OHiggins 1058, Santiago, Chile.,University of Chile
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Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil National Observatory Brazil (creator_code:org_t)
- 2018-06-14
- 2018
- English.
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In: Astrophysical Journal Letters. - : Institute of Physics Publishing (IOPP). - 2041-8205 .- 2041-8213. ; 860:1
- Related links:
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Abstract
Subject headings
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- The first detailed chemical abundance analysis of the M-dwarf (M4.0) exoplanet-hosting star Ross 128 is presented here, based upon near-infrared (1.5-1.7 mu m), high-resolution (R similar to 22,500) spectra from the SDSS Apache Point Galactic Evolution Experiment survey. We determined precise atmospheric parameters T-eff = 3231 +/- 100 K, log g = 4.96 +/- 0.11 dex and chemical abundances of eight elements (C, O, Mg, Al, K, Ca, Ti, and Fe), finding Ross 128 to have near solar metallicity ([Fe/H] = +0.03 +/- 0.09 dex). The derived results were obtained via spectral synthesis (1D LTE) adopting both MARCS and PHOENIX model atmospheres; stellar parameters and chemical abundances derived from the different adopted models do not show significant offsets. Mass-radius modeling of Ross 128b indicates that it lies below the pure-rock composition curve, suggesting that it contains a mixture of rock and iron, with the relative amounts of each set by the ratio of Fe/Mg. If Ross 128b formed with a subsolar Si abundance, and assuming the planet's composition matches that of the host star, it likely has a larger core size relative to the Earth despite this producing a planet with a Si/Mg abundance ratio similar to 34% greater than the Sun. The derived planetary parameters-insolation flux (S-Earth = 1.79 +/- 0.26) and equilibrium temperature (T-eq = 294. +/-. 10 K)-support previous findings that Ross 128b is a temperate exoplanet in the inner edge of the habitable zone.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Star: abundances
- infrared: stars
- planet-star interactions
- planetary systems
- stars: fundamental parameters
- stars: low-mass
- infrared: stars
- planetary systems
- planetstar interactions
- stars: abundances
- stars: fundamental parameters
- stars: low-mass
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Souto, Diogo
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Unterborn, Cayma ...
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Smith, Verne V.
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Cunha, Katia
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Teske, Johanna
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Covey, Kevin
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Rojas-Ayala, Bar ...
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Garcia-Hernandez ...
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Stassun, Keivan
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Zamora, Olga
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Masseron, Thomas
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Johnson, J. A.
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Majewski, Steven ...
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Jönsson, Henrik
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Gilhool, Steven
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Blake, Cullen
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Santana, Felipe
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Malmö University
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Lund University