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Zodiacal exoplanets...
Zodiacal exoplanets in time (ZEIT) - II. A 'super-Earth' orbiting a young K dwarf in the Pleiades Neighbourhood
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- Gaidos, E. (författare)
- Univ Hawaii Manoa, Dept Geol & Geophys, Honolulu, HI 96822 USA.
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- Mann, A. W. (författare)
- Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
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- Rizzuto, A. (författare)
- Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
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- Nofi, L. (författare)
- Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA.
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- Mace, G. (författare)
- Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
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- Vanderburg, A. (författare)
- Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
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- Feiden, Gregory (författare)
- Uppsala universitet,Teoretisk astrofysik
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- Narita, N. (författare)
- Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130038, Japan.;Natl Inst Nat Sci, Astrobiol Ctr, Mitaka, Tokyo 1818588, Japan.;Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.;SOKENDAI Grad Univ Adv Studies, Mitaka, Tokyo 1818588, Japan.
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- Takeda, Y. (författare)
- Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
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- Esposito, T. M. (författare)
- Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
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- De Rosa, R. J. (författare)
- Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
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- Ansdell, M. (författare)
- Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA.
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- Hirano, T. (författare)
- Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan.
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- Graham, J. R. (författare)
- Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA.
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- Kraus, A. (författare)
- Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
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- Jaffe, D. (författare)
- Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
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Univ Hawaii Manoa, Dept Geol & Geophys, Honolulu, HI 96822 USA Univ Texas Austin, Dept Astron, Austin, TX 78712 USA. (creator_code:org_t)
- 2016-09-15
- 2017
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press. - 0035-8711 .- 1365-2966. ; 464:1, s. 850-862
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We describe a 'super-Earth'-size (2.30 +/- 0.16 R-circle plus)planet transiting an early K-type dwarf star in the Campaign 4 field observed by the K2 mission. The host star, EPIC 210363145, was identified as a candidate member of the approximately 120 Myr-old Pleiades cluster based on its kinematics and photometric distance. It is rotationally variable and exhibits near-ultraviolet emission consistent with a Pleiades age, but its rotational period is approximate to 20 d and its spectrum contains no H alpha emission nor the Li I absorption expected of Pleiades K dwarfs. Instead, the star is probably an interloper that is unaffiliated with the cluster, but younger (less than or similar to 1.3 Gyr) than the typical field dwarf. We ruled out a false positive transit signal produced by confusion with a background eclipsing binary by adaptive optics imaging and a statistical calculation. Doppler radial velocity measurements limit the companion mass to <2 times that of Jupiter. Screening of the light curves of 1014 potential Pleiades candidate stars uncovered no additional planets. An injection-and-recovery experiment using the K2 Pleiades light curves with simulated planets, assuming a planet population like that in the Kepler prime field, predicts only 0.8-1.8 detections (versus similar to 20 in an equivalent Kepler sample). The absence of Pleiades planet detections can be attributed to the much shorter monitoring time of K2 (80 d versus 4 yr), increased measurement noise due to spacecraft motion, and the intrinsic noisiness of the stars.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- planets and satellites:general
- stars:low-mass
- planetary systems
- open clusters and associations:individual:Pleiades
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Gaidos, E.
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Mann, A. W.
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Rizzuto, A.
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Nofi, L.
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Mace, G.
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Vanderburg, A.
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visa fler...
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Feiden, Gregory
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Narita, N.
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Takeda, Y.
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Esposito, T. M.
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De Rosa, R. J.
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Ansdell, M.
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Hirano, T.
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Graham, J. R.
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Kraus, A.
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Jaffe, D.
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