Chandra X-ray observations of G11.2-0.3: Implications for pulsar ages

V. M. Kaspi, Mallory Roberts, G. Vasisht, E. V. Gotthelf, M. Pivovaroff, N. Kawai

Research output: Contribution to journalArticle

Abstract

We present Chandra X-Ray Observatory imaging observations of the young Galactic supernova remnant G11.2-0.3. The image shows that the previously known young 65 ms X-ray pulsar is at position (J2000) RA. 18h11m29s.22, decl. -19°25′27″.6, with 1 σ error radius of 0″.6. This is within 8″ of the geometric center of the shell. This provides strong confirming evidence that the system is younger, by a factor of ∼12, than the characteristic age of the pulsar. The age discrepancy suggests that pulsar characteristic ages can be poor age estimators for young pulsars. Assuming conventional spin-down with constant magnetic field and braking index, the most likely explanation for the age discrepancy in G11.2-0.3 is that the pulsar was born with a spin period of ∼62 ms. The Chandra image also reveals, for the first time, the morphology of the pulsar wind nebula. The elongated hard X-ray structure can be interpreted as either a jet or a Crab-like torus seen edge-on. This adds to the growing list of highly aspherical pulsar wind nebulae and argues that such structures are common around young pulsars.

Original languageEnglish (US)
Pages (from-to)371-377
Number of pages7
JournalAstrophysical Journal
Volume560
Issue number1 PART 1
DOIs
StatePublished - Oct 10 2001

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pulsars
x rays
nebulae
crab
observatory
crabs
braking
young
shell
magnetic field
supernova remnants
estimators
lists
observatories
radii
magnetic fields

Keywords

  • Pulsars: general
  • Pulsars: individual (AX J1811.5-1926, PSR J1811-1925)
  • Supernovae: individual (G11.2-0.3)
  • X-rays: general

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science

Cite this

Kaspi, V. M., Roberts, M., Vasisht, G., Gotthelf, E. V., Pivovaroff, M., & Kawai, N. (2001). Chandra X-ray observations of G11.2-0.3: Implications for pulsar ages. Astrophysical Journal, 560(1 PART 1), 371-377. https://doi.org/10.1086/322515

Chandra X-ray observations of G11.2-0.3 : Implications for pulsar ages. / Kaspi, V. M.; Roberts, Mallory; Vasisht, G.; Gotthelf, E. V.; Pivovaroff, M.; Kawai, N.

In: Astrophysical Journal, Vol. 560, No. 1 PART 1, 10.10.2001, p. 371-377.

Research output: Contribution to journalArticle

Kaspi, VM, Roberts, M, Vasisht, G, Gotthelf, EV, Pivovaroff, M & Kawai, N 2001, 'Chandra X-ray observations of G11.2-0.3: Implications for pulsar ages', Astrophysical Journal, vol. 560, no. 1 PART 1, pp. 371-377. https://doi.org/10.1086/322515
Kaspi VM, Roberts M, Vasisht G, Gotthelf EV, Pivovaroff M, Kawai N. Chandra X-ray observations of G11.2-0.3: Implications for pulsar ages. Astrophysical Journal. 2001 Oct 10;560(1 PART 1):371-377. https://doi.org/10.1086/322515
Kaspi, V. M. ; Roberts, Mallory ; Vasisht, G. ; Gotthelf, E. V. ; Pivovaroff, M. ; Kawai, N. / Chandra X-ray observations of G11.2-0.3 : Implications for pulsar ages. In: Astrophysical Journal. 2001 ; Vol. 560, No. 1 PART 1. pp. 371-377.
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