منابع مشابه
Dynamics of the 55 Cancri System
Recent studies of the 55 Cancri system suggest the existence of three planets with periods of ∼15 days, ∼45 days, and ∼5500 days (Marcy et al. 2002). The inner two planets are near the 3:1 mean motion commensurability and it is likely that these two planets became trapped in the resonance while farther from the star and migrated together. As the innermost planet begins to dissipate energy throu...
متن کاملSuperhumps of CC Cancri Revisited
We observed the 2001 November superoutburst of CC Cnc. This observation makes the first detailed coverage of a superoutburst of this object. The best-determined mean superhump period is 0.075518±0.000018 d, which is 2.7% longer than the reported orbital period. This fractional superhump excess is a quite typical value for a normal SU UMa-type dwarf nova, excluding the previously raised possibil...
متن کاملNew sub-millimeter limits on dust in the 55 Cancri planetary system
We present new, high-sensitivity sub-millimeter observations towards 55 Cancri, a nearby G8 star with one, or possibly two, known planetary companion(s). Our 850 μm map, obtained with the SCUBA instrument on the James Clerk Maxwell Telescope, shows three peaks of emission at the 2.5 mJy level in the vicinity of the star’s position. However, the observed peaks are 25′′–40′′ away from the star an...
متن کاملModel Predictive Control for the Modified Quadruple Tank System
In this paper, we present in a tutorial fashion the implementation of Model Predictive Control (MPC) on a virtual model of the modified quadruple tank system. The modified quadruple tank system is an example of a multi-input-multi-output (MIMO) system with known and unknown disturbances. Model Predictive Control is well known for its ability to deal with multivariable and complex control proble...
متن کاملA Quadruple Lens System Found in the CLASSGravitational Lens SurveyS
The rst phase of a large gravitational lens survey using the Very Large Array at a wavelength of 3.6 cm has been completed, yielding images for 3258 radio sources. The Cosmic Lens All-Sky Survey, or CLASS, is designed to locate gravitational lens systems consisting of multiply-imaged compact components with separations > 0: 00 2. We report here the rst discovery of a gravitational lens from the...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1953
ISSN: 0004-6256
DOI: 10.1086/106912