Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-01-11
Astrophys.J.660:858-862,2007
Astronomy and Astrophysics
Astrophysics
16 pages (including figures), 5 figures, 1 table. Accepted for publication in the Astrophysical Journal
Scientific paper
10.1086/512722
We present accurate V-band photometry for a planetary transit of OGLE-TR-111 acquired with VIMOS at the ESO Very Large Telescope. The measurement of this transit allows to refine the planetary radius, obtaining R_p= 1.01 +/- 0.06 R_J. Given the mass of M_p = 0.53 M_J previously measured from radial velocities, we confirm that the density is rho_p= 0.6 +/- 0.2 g/cm^3. We also revise the ephemeris for OGLE-TR-111-b, obtaining an accurate orbital period P= 4.014484 +/- 0.000014 days, and predicting that the next observable transits would occur around December 2006, and after that only in mid-2008. Even though this period is different from previously published values, we cannot yet rule out a constant period.
Díaz Rodrigo F.
Fernandez Jose Miguel
Gieren Wolfgang
Pietrzynski Grzegorz
Rojo Patricio
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