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wasp106 [2015/12/10 21:55] Gracjan Maciejewski |
wasp106 [2017/02/21 10:23] |
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| - | ===== WASP-106 b ===== | ||
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| - | === AIMS === | ||
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| - | The exoplanet WASP-106 b belongs to a small group of transiting Jupiter-like planets on a relatively wide orbits discovered from the ground (Smith et al. 2014). This warm Jupiter has a mass of 2 M_Jup and needs over 9 days to orbit its host star. A long orbital period, long duration of a transit event of 5 hours, and transit depth of only 8 mmag make follow-up observations challenging from the ground. Few complete transits are observable each year from a given site. The literature data clearly show that new high-precision transit observations are desired to learn system parameters with higher precision. | ||
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| - | Our reanalysis of the literature data (RV and timing datasets) indicates that there are possible scenarios, which mimic the non-zero orbital eccentricity of WASP-106 b. A dynamical (Newtonian) model shows that two-planet scenarios with circular orbits can give fits of the similar goodness to that one of a single planet on the eccentric orbit. Those scenarios assume the existence of an additional planet in or close to the inner 2:1 resonance. | ||
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| - | The mass of the hypothetical additional planet is about 0.13 M_Jup. If it is a transiting planet, it could produce a flux drop up to 2-3 mmag if a low planetary density is assumed. Such a signal could not be detected by a small-aperture telescopes of the SuperWASP survey, but could be detected with 1.5 m telescopes. | ||
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| - | New transits observations for the known planet WASP-106 b will help determine its physical properties more accurately, refine a transit ephemeris, and check for any signatures of departure from a strict periodicity that could be a sign of dynamical perturbations. Our observations, which were acquired with the 1.5 m telescope at the Sierra Nevada Observatory, give a strong hint that there are variations in transit times. This finding supports our previous hypothesis and allowed us to refine transit predictions for planet c. WASP-106 is our strong candidate for a compact planetary system with a Jupiter-like planet. | ||
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| - | === RESULTS === | ||
| - | No results so far. | ||
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| - | === STATUS === | ||
| - | The campaign has begun. Only high-quality data (>1 m mirrors) in filters are needed (please do not use a //clear// filter). | ||
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| - | === LIGHT CURVES === | ||
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| - | | **No.** | **Date** | **Instrument** | **Comment** | | ||
| - | | 1 | 2015 Mar 13 | OSN 1.5 m | partial | | ||
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| - | === CONTACT === | ||
| - | PI: Gracjan Maciejewski <gmac@umk.pl> | ||