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wasp106 [2016/09/18 00:11]
Gracjan Maciejewski
wasp106 [2017/02/21 10:23]
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-===== WASP-106 b ===== 
-=== AIMS === 
-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. ​   ​ 
-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.  ​ 
-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. 
-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. 
-=== RESULTS === 
-No conclusive results so far. 
-=== STATUS === 
-The campaign is extended until 2017. Only high-quality data (>1 m mirrors) in filters are needed (please do not use a //clear// filter). 
-=== LIGHT CURVES === 
-| **No.** | **Date** | **Instrument** | **Comment** | 
-| 1 | 2015 Mar 13 | OSN 1.5 m   | partial |  ​ 
-| 1 | 2016 Feb 01 | OSN 1.5 m   | not perfect weather conditions |  
-  ​ 
-=== CONTACT === 
-PI: Gracjan Maciejewski <​gmac@umk.pl>​ 
wasp106.txt ยท Last modified: 2017/02/21 10:23 (external edit)
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