Chandra Solves Pulsar Puzzle With Plasmoid
This is about the story titled 'Chandra Images Show That Geometry Solves a Pulsar Puzzle'
This story from Chandra is apparently describing a plasmoid for two similar pulsars, both 'rotating about five times per second.'
From the story about two similar pulsars but in slightly different orientations:
A likely interpretation of the Chandra images is that the long narrow trails to the side of Geminga and the double tail of B0355+54 represent narrow jets emanating from the pulsar's spin poles. Both pulsars also contain a torus, a disk-shaped region of emission spreading from the pulsar's spin equator. These donut-shaped structures and jets are crushed and swept back as the pulsars fly through the Galaxy at supersonic speeds.
In the case of Geminga, the view of the torus is close to edge-on, while the jets point out to the sides. B0355+54 has a similar structure, but with the torus viewed nearly face-on and the jets pointing nearly directly towards and away from Earth. In B0355+54, the swept-back jets appear to lie almost on top of each other, giving a doubled tail.
Both pulsars have magnetic poles quite close to their spin poles, as is the case for the Earth's magnetic field. These magnetic poles are the site of pulsar radio emission so astronomers expect the radio beams to point in a similar direction as the jets. By contrast the gamma-ray emission is mainly produced along the spin equator and so aligns with the torus.
For Geminga, astronomers view the bright gamma-ray pulses along the edge of the torus, but the radio beams near the jets point off to the sides and remain unseen. For B0355+54, a jet points almost along our line of sight towards the pulsar. This means astronomers see the bright radio pulses, while the torus and its associated gamma-ray emission are directed in a perpendicular direction to our line of sight, missing the Earth.
The pair of images in the story helps with the descriptions (above and below).
The two images: top left < 2ly at distance of 3400ly, top right about 1ly at distance 800ly.
The top left pulsar clearly has jets out both poles.
The jet out to the above left splits in two and arcs out and down symmetrically but then both cease their X-ray emissions.
The jet out to the lower right is linear but its X-ray emissions are not consistent before dimming.
The top right pulsar has a bowl shape with the pulsar at the base of this bowl. X-ray emissions are also stronger along the rim of this bowl shape. There is also a wide jet of X-ray emissions symmetrical to this bowl, to the lower right, in line with the pulsar.
I expect both the half circle or the torus shape are due to the plasmoid's magnetic field, not that either is 'crushed' by the velocity of the object.
These pulsar observations are consistent with the M87 plasmoid description.
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