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Kepler-11 is a Sola...
Kepler-11 is a Solar Twin : Revising the Masses and Radii of Benchmark Planets via Precise Stellar Characterization
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- Bedell, Megan (författare)
- University of Chicago
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- Bean, Jacob L. (författare)
- University of Chicago
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- Meléndez, Jorge (författare)
- University of São Paulo
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- Mills, Sean M. (författare)
- University of Chicago
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- Fabrycky, Daniel C. (författare)
- University of Chicago
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- Freitas, Fabrício C. (författare)
- University of São Paulo
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- Ramírez, Ivan (författare)
- University of Texas
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- Asplund, Martin (författare)
- Australian National University
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- Liu, Fan (författare)
- Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science,Australian National University
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- Yong, David (författare)
- Australian National University
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(creator_code:org_t)
- 2017-04-20
- 2017
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 839:2
- Relaterad länk:
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http://dx.doi.org/10...
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https://iopscience.i...
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The six planets of the Kepler-11 system are the archetypal example of a population of surprisingly low-density transiting planets revealed by the Kepler mission. We have determined the fundamental parameters and chemical composition of the Kepler-11 host star to unprecedented precision using an extremely high-quality spectrum from Keck-HIRES (R ≃ 67,000, S/N per pixel at 600 nm). Contrary to previously published results, our spectroscopic constraints indicate that Kepler-11 is a young main-sequence solar twin. The revised stellar parameters and new analysis raise the densities of the Kepler-11 planets by between 20% and 95% per planet, making them more typical of the emerging class of "puffy" close-in exoplanets. We obtain photospheric abundances of 22 elements and find that Kepler-11 has an abundance pattern similar to that of the Sun with a slightly higher overall metallicity. We additionally analyze the Kepler light curves using a photodynamical model and discuss the tension between spectroscopic and transit/TTV-based estimates of stellar density.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- planets and satellites: fundamental parameters
- stars: abundances
- stars: fundamental parameters
- techniques: spectroscopic
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Bedell, Megan
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Bean, Jacob L.
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Meléndez, Jorge
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Mills, Sean M.
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Fabrycky, Daniel ...
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Freitas, Fabríci ...
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visa fler...
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Ramírez, Ivan
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Asplund, Martin
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Liu, Fan
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Yong, David
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Astronomi astrof ...
- Artiklar i publikationen
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Astrophysical Jo ...
- Av lärosätet
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Lunds universitet