منابع مشابه
A Real-Time Measuring Method of Translational/Rotational Velocities of a Flying Ball
We propose a real-time measuring method of both the translational/rotational velocities of a flying ball using two high speed cameras. The rotational velocity is estimated by the kinematics which relates the velocity to the position variation of the centroid of a feature area marked on the ball. The position variation is calculated by the correlation between two images with respect to the trans...
متن کاملExplanations of pulsar velocities
The proper motions of pulsars [1] present an intriguing astrophysical puzzle. The measured velocities of pulsars exceed those of the ordinary stars in the galaxy by at least an order of magnitude. The data suggest that neutron stars receive a powerful \kick" at birth. Whatever the cause of the kick, the same mechanism may also explain the rotations of pulsars under some conditions [2]. The orig...
متن کاملMeteor velocities
Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract Determining the velocity of meteoroids as they enter the Earth's atmosphere is very important since the value is fundamental in calculating the orbit of the meteoroid and hence eventually its origin. We describe early attempts at this determination and hi...
متن کاملPeculiar Velocities of Galaxy Clusters
We investigate the peculiar velocities predicted for galaxy clusters by theories in the cold dark matter family. A widely used hypothesis identifies rich clusters with high peaks of a suitably smoothed version of the linear density fluctuation field. Their peculiar velocities are then obtained by extrapolating the similarly smoothed linear peculiar velocities at the positions of these peaks. We...
متن کاملThe origin of pulsar velocities
We have recently proposed an explanation for the birth velocities of pulsars as resulting from asymmetries due to neutrino oscillations in the cooling protoneutron star. A specific prediction of this mechanism is that the correlation of velocities and magnetic fields should be stronger for slowly rotating neutron stars and weaker for those whose periods are less than 1 s. A remarkable agreement...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1918
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1918)46<166c:rvom>2.0.co;2