2006/03/12 by G. A. Bakos, H. Knutson, F. Pont +13 · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/506316
published as Astrophys.J.650:1160-1171,2006 · 10 pages, 4 figures, submitted to ApJ
arxiv created 2006/03/12 · openalex publication_date 2006/10/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We report on the BVRI multiband follow-up photometry of the transiting extrasolar planet HD 189733b. We revise the transit parameters and find a planetary radius of R P = 1.154 ± 0.033 R J and an inclination of i P = 85 79 ± 0 24. The new density (~1 g cm -3 ) is significantly higher than the former estimate (~0.75 g cm -3 ); this shows that from the current sample of nine transiting planets, only HD 209458 (and possibly OGLE-10b) have anomalously large radii and low densities. We note that due to the proximity of its parent star, HD 189733b currently has one of the most precise radius determinations among extrasolar planets. We calculate new ephemerides, P = 2.218573 ± 0.000020 days and T 0 = 2453629.39420 ± 0.00024 (HJD), and estimate the timing offsets of the 11 distinct transits with respect to the predictions of a constant orbital period, which can be used to reveal the presence of additional planets in the system.