Detection of a transit of the super-Earth 55 Cancri e with warm Spitzer
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Seager_Detection of.pdf
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Author(s)
Gillon, M.
Deming, Drake
Lovis, Christophe
Cubillos, P.
Stevenson, K. B.
Mayor, Michel
Pepe, F.
Queloz, D.
Segransan, D.
Udry, S.
Date Issued
September 2011
Journal
Astronomy & Astrophysics
Publisher
EDP Sciences
Citation
Demory, B.-O., M. Gillon, D. Deming, D. Valencia, S. Seager, B. Benneke, C. Lovis, et al. “ Detection of a Transit of the Super-Earth 55 Cancri e with Warm Spitzer .” A&A 533 (September 2011): A114. © ESO, 2011
Version
Final published version
Abstract
We report on the detection of a transit of the super-Earth 55 Cnc e with warm Spitzer in IRAC’s 4.5 μm band. Our MCMC analysis includes an extensive modeling of the systematic effects affecting warm Spitzer photometry, and yields a transit depth of 410 ± 63 ppm, which translates to a planetary radius of 2.08[+0.16 over -0.17]R[subscript ⊕] as measured in IRAC 4.5 μm channel. A planetary mass of 7.81[+0.58 over -0.53]M[subscript ⊕] is derived from an extensive set of radial-velocity data, yielding a mean planetary density of 4.78[+1.31 over -1.20] g cm[superscript -3]. Thanks to the brightness of its host star (V = 6, K = 4), 55 Cnc e is a unique target for the thorough characterization of a super-Earth orbiting around a solar-type star.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1051/0004-6361/201117178
