Article (Scientific journals)
Detection of a transit of the super-Earth 55 Cnc e with Warm Spitzer
Demory, B.-O.; Gillon, Michaël; Deming, D. et al.
2011In Astronomy and Astrophysics, 533, p. 114
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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.
Mayor, M.
Pepe, F.
Queloz, D.
Segransan, D.
Udry, S.
More authors (5 more) Less
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
Available on ORBi :
since 11 July 2011

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