A short-period super-Earth orbiting the M2.5 dwarf GJ3634. Detection with Harps velocimetry and transit search with Spitzer photometry
arXiv:1102.1420 · doi:10.1051/0004-6361/201015981
Abstract
We report on the detection of GJ3634b, a super-Earth of mass m sin i = 7.0 +/-0.9 Mearth and period P = 2.64561 +/- 0.00066 day. Its host star is a M2.5 dwarf, has a mass of 0.45+/-0.05 Msun, a radius of 0.43+/-0.03 Rsun 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. GJ3634b 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-micron band of the IRAC imager onboard Spitzer. Our six-hour long light curve excludes that a transit occurs for 2 sigma of the probable transit window, decreasing the probability that GJ3634b undergoes transit to ~0.5%.
A&A, accepted. Radial-velocity and photometric tables are available in electronic form at the CDS
References in corpus (7)
- The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
- Mass-Radius Relationships for Solid Exoplanets
- Habitable planets around the star Gl 581?
- The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
- The HARPS search for southern extra-solar planets: XIV. Gl 176b, a super-Earth rather than a Neptune, and at a different period
- A Bayesian Kepler Periodogram detects a second planet in HD 208487
- The Na I D resonance lines in main sequence late-type stars
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