A polarized view of the Pulsar Wind Nebulae with IXPE

谢斐（Guangxi University）, 2024-03-28

Colloquium

https://astro.tsinghua.edu.cn/info/1100/2780.htm

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IXPE

• Imaging X-ray Polarimetry Explorer (IXPE)

  • for known bright X-ray sources
  • extended source: FoV 12.9 arcmin

• photoelectric effect

method

• get a track of the photon
• find the head of the track
  • the low density side is head, since energy loss increase with decreasing kinetic energy.
• measure polarization direction
• statistical analysis of all photons

meaning

IXPE: polarization x image at X-ray band

pulsar wind nebulae

hot bubbles of relativistic particles and magnetic fields emitting non-thermal radiation.

Interesting objects:

• M1
• Vela Nebula
  • 2 arcs
  • 290 pc
• MSH 15-52

Main findings:

• for Vela, the X-ray and radio polarizaiton are consistent with each other.
• for MSH 15-52, B polarization follows the structure of the nebulae.
• for "crab twin": structure fit from mophology or polarization?