A short-period super-Earth orbiting the M2.5 dwarf GJ 3634
Author(s)Bonfils, Xavier; Gillon, M.; Forveille, Thierry; Delfosse, Xavier; Deming, Drake; Lovis, Christophe; Mayor, Michel; Neves, Vasco; Perrier, C.; Santos, N. C.; Udry, S.; Boisse, I.; Bonnefoy, M.; Demory, Brice-Olivier; Seager, Sara; ... Show more Show less
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We report on the detection of GJ 3634b, a super-Earth of mass m sin i = 7.0[+0.9 over -0.8] M[subscript ⊙] and period P = 2.64561 ± 0.00066 day. Its host star is a M2.5 dwarf, has a mass of 0.45 ± 0.05 M[subscript ⊙], a radius of 0.43 ± 0.03 R[subscript ⊙] and lies 19.8 ± 0.6 pc away from our Sun. The planet is detected after a radial-velocity campaign using the ESO/Harps spectrograph. GJ 3634b had an a priori geometric probability to undergo transit of ~7% and, if telluric in composition, a non-grazing transit would produce a photometric dip of ≲0.1%. We therefore followed-up upon the RV detection with photometric observations using the 4.5-μm band of the IRAC imager onboard Spitzer. Our six-hour long light curve excludes that a transit occurs for 2σ of the probable transit window, decreasing the probability that GJ 3634b undergoes transit to ~0.5%.
DepartmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology. Department of Physics
Astronomy & Astrophysics
Bonfils, X., M. Gillon, T. Forveille, X. Delfosse, D. Deming, B.-O. Demory, C. Lovis, et al. “A Short-Period Super-Earth Orbiting the M2.5 Dwarf GJ 3634.” A&A 528 (April 2011): A111. © ESO, 2011
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