Evidence for collimated particle beams from pulsars and precession

  title={Evidence for collimated particle beams from pulsars and precession},
  author={Avinash A. Deshpande and V. Radhakrishnan Arecibo Observatory and Naic and Arecibo Raman Research Institute and Bangalore},
We follow up on our (Radhakrishnan & Deshpande) radically different interpretation of the observed structures and morphologies in the X-ray observations of the nebulae around young pulsars (PWNe). In our general model for PWNe (Radhakrishnan & Deshpande), originally motivated by the Chandra observations of the Vela X-ray nebula, the bright arcs, the jetlike feature, and the diffuse components in such nebulae can be explained together in detail, wherein the arcs are understood as traces of the… 

Figures from this paper

The optical polarisation of the Vela pulsar revisited
Aims. In this work we present a revised measurement of the phase-averaged optical polarisation of the Vela pulsar (PSR B0833-45), for which only one value has been published so far (Wagner & Seifert
Hyperfast pulsars as the remnants of massive stars ejected from young star clusters
It is found that main-sequence O-type stars cannot be ejected from young massive star clusters with peculiar velocities high enough to explain the origin of hyperfast neutron stars, but lower mass main- sequence stars or the stripped helium cores of massive stars could be accelerated to hypervelocities.
The helical jet of the Vela Pulsar
We have studied the fascinating dynamics of the nearby Vela pulsar's nebula in a campaign comprising eleven 40ks observations with Chandra X-ray Observatory (CXO). The deepest yet images revealed the
Oscillations in the angular velocity of pulsars
Observational data on long-period oscillations in the angular velocity of pulsars are examined. The characteristic radii of the superfluid regions of pulsars are determined assuming that these
Quark matter influence on observational properties of compact stars
Abstract Densities in compact stars may be such that quarks are no longer confined in hadrons, but instead behave as weakly interacting particles. In this regime perturbative calculations are


Chandra Imaging of the X-Ray Nebula Powered by Pulsar B1509?58
We present observations with the Chandra X-Ray Observatory of the pulsar wind nebula (PWN) powered by the energetic young pulsar B1509-58. These data confirm the complicated morphology of the system
Vela, its X-ray nebula, and the polarization of pulsar radiation
The recent identification of the perpendicular mode of radio polarization as the primary one in the Vela pulsar by Lai et al. (2001) is interpreted in terms of the maser mechanism proposed by Luo &
Vela pulsar and its synchrotron nebula
We present high-resolution Chandra X-ray observations of PSR B0833-45, the 89 ms pulsar associated with the Vela supernova remnant. We have acquired two observations separated by 1 month to search
Spatial Variation of the X-Ray Spectrum of the Crab Nebula
We present a spectral analysis of the Crab Nebula obtained with the Chandra X-ray observatory. The X-ray spectrum is characterized by a power law whose index varies across the nebula. The variation
The Variable Jet of the Vela Pulsar
Observations of the Vela pulsar-wind nebula (PWN) with the Chandra X-ray Observatory have revealed a complex, variable PWN structure, including inner and outer arcs, a jet in the direction of the
Discovery of Spatial and Spectral Structure in the X-Ray Emission from the Crab Nebula.
Zeroth-order images with the High-Energy Transmission Grating (HETG) readout by the Advanced CCD Imaging Spectrometer spectroscopy array (ACIS-S) show a striking richness of X-ray structure at a resolution comparable to that of the best ground-based visible-light observations.
Evidence for free precession in a pulsar
The discovery of long-term, highly periodic and correlated variations in both the pulse shape and the rate of slow-down of the pulsar PSR B1828-11, probably resulting from precession of the spin axis caused by an asymmetry in the shape ofThe pulsar.
Hubble Space Telescope and Chandra Monitoring of the Crab Synchrotron Nebula
We report the results of coordinated Hubble Space Telescope and Chandra observations of the Crab synchrotron nebula. Similar dynamical structures, including equatorial wisps moving outward at ~0.5c,
Variability of the Vela Pulsar Wind Nebula Observed with Chandra
The observations of the pulsar wind nebula (PWN) around the Vela pulsar with the Advanced CCD Imaging Spectrometer aboard the Chandra X-Ray Observatory, taken on 2000 April 30 and November 30, reveal
High-energy γ-ray light curve of PSR0531 + 21
The Crab pulsar (PSR0531 + 21) was one of the earliest identified sources of high-energy γ radiation1–6. As such it was selected as the first object of detailed study by ESA's γ-ray astronomy