منابع مشابه
Long-term changes of the Be star OT Geminorum
We investigate the character of light variability of the bright Be star OT Gem. Two phases of the long-term light changes were distinguished: – a quiet phase which is characterized by mild light changes; and – an active phase in which the sudden increases of brightness up to 0. m 4 in V occur. During the active phases, a cyclic oscillation of brightness of a period between 70 and 80 days is pre...
متن کاملNova Geminorum No. 2 as a Wolf-Rayet Star.
It has been known for many years that the spectrum of temporary stars or Novae develops in a later stage into a spectrum nearly identical with that of planetary nebulae. First observed in the case of Nova Aurigae of 1891, the same result has been found to hold for all of the temporary stars observed since that time, including the most important Nova of recent years, Nova Persei of 1901. The que...
متن کاملOn Edge-Decomposition of Cubic Graphs into Copies of the Double-Star with Four Edges
A tree containing exactly two non-pendant vertices is called a double-star. Let $k_1$ and $k_2$ be two positive integers. The double-star with degree sequence $(k_1+1, k_2+1, 1, ldots, 1)$ is denoted by $S_{k_1, k_2}$. It is known that a cubic graph has an $S_{1,1}$-decomposition if and only if it contains a perfect matching. In this paper, we study the $S_{1,2}$-decomposit...
متن کاملDouble-Star Detection Using Convolutional Neural Network in Atmospheric Turbulence
In this paper, we investigate the usage of machine learning in the detection and recognition of double stars. To do this, numerous images including one star and double stars are simulated. Then, 100 terms of Zernike expansion with random coefficients are considered as aberrations to impose on the aforementioned images. Also, a telescope with a specific aperture is simulated. In this work, two k...
متن کاملPeg solitaire on the windmill and the double star graphs
In a recent work by Beeler and Hoilman, the game of peg solitaire is generalized to arbitrary boards. These boards are treated as graphs in the combinatorial sense. In this paper, we extend this study by considering the windmill and the double star. Simple necessary and sufficient conditions are given for the solvability of each graph. We also discuss an open problem concerning the range of val...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1875
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/36.2.83a