Anisotropic Distribution of Space Pulsar Velocities
نویسندگان
چکیده
منابع مشابه
Explanations 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...
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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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One of the most challenging problems in modern astrophysics is to find a consistent explanation for the high velocity of pulsars. Observations [1] show that these velocities range from zero up to 900 km/s with a mean value of 450 ± 50 km/s . An attractive possibility is that pulsar motion arises from an asymmetric neutrino emission during the supernova (SN) explosion. In fact, neutrinos carry m...
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We have made VLA images of the elds around three young pulsars which have resulted in the discovery of two new supernova remnants and connrmation of a third. We argue that, in at least two cases and perhaps the third, the pulsars are physically associated with these supernova remnants. A review of all known young pulsars shows that the majority are associated with supernova remnants. We show th...
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Spherical models with constant velocity anisotropy β have distribution functions depending on binding energy E and angular momentum L of the form f (E, L) = L−2β fE(E). An inversion for the unknown function fE (E) is straightforward to derive and reduces to Eddington’s famous algorithm for isotropic models (β = 0). Importantly, if the anisotropy parameter of the model is a half-integer constant...
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ژورنال
عنوان ژورنال: American Journal of Astronomy and Astrophysics
سال: 2014
ISSN: 2376-4678
DOI: 10.11648/j.ajaa.s.2014020601.14