Detection of a transit of the super-Earth 55 Cnc e with Warm Spitzer

Demory, B.-O.; Gillon, Michaël; Deming, D.; Valencia, D.; Seager, S.; Benneke, B.; Lovis, C.; Cubillos, P.; Harrington, J.; Stevenson, K. B.; Mayor, M.; Pepe, F.; Queloz, D.; Segransan, D.; Udry, S.

doi:10.1051/0004-6361/201117178

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Detection of a transit of the super-Earth 55 Cnc e with Warm Spitzer

Demory, B.-O.; Gillon, Michaël; Deming, D. et al.

2011 • In Astronomy and Astrophysics, 533, p. 114

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https://hdl.handle.net/2268/95420

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10.1051/0004-6361/201117178

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Keywords :

Astrophysics - Earth and Planetary Astrophysics

Abstract :

[en] 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+0.16-0.17 R_oplus as measured in IRAC 4.5 μm channel. A planetary mass of 7.81-0.53+0.58 M_oplus is derived from an extensive set of radial-velocity data, yielding a mean planetary density of 4.78-1.20+1.31 g cm-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.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Demory, B.-O.

Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image

Deming, D.

Valencia, D.

Seager, S.

Benneke, B.

Lovis, C.

Cubillos, P.

Harrington, J.

Stevenson, K. B.

More authors (5 more)

Language :

English

Title :

Detection of a transit of the super-Earth 55 Cnc e with Warm Spitzer

Publication date :

02 September 2011

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

533

Pages :

114

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2011arXiv1105.0415D

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since 11 July 2011

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