Pulsar Velocities – Revisions & Ramifications
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...
متن کاملPulsar Velocities without Neutrino Mass
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...
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...
متن کاملResonant spin–flavour precession of neutrinos and pulsar velocities
Young pulsars are known to exhibit large space velocities, up to 10 km/s. We propose a new mechanism for the generation of these large velocities based on an asymmetric emission of neutrinos during the supernova explosion. The mechanism involves the resonant spin–flavour precession of neutrinos with a transition magnetic moment in the magnetic field of the supernova. The asymmetric emission of ...
متن کاملPulsar velocities and dark matter hint at a singlet neutrino
Two astrophysical puzzles, the origin of pulsar velocities and that of dark matter, may have a simultaneous explanation if there exists a sterile neutrino with a mass in the 1–20 keV range and a small mixing (sin θ ∼ 10) with the electron neutrino. Although the mixing is too small for direct detection, future observations of the X-ray telescopes, as well as the gravity waves detectors, such as ...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1996
ISSN: 0252-9211
DOI: 10.1017/s0252921100040963