DEEP CHANDRA OBSERVATIONS of the PULSAR WIND NEBULA CREATED by PSR B0355+54

Noel Klingler, Blagoy Rangelov, Oleg Kargaltsev, George G. Pavlov, Roger W. Romani, Bettina Posselt, Patrick Slane, Tea Temim, C. Y. Ng, Niccolò Bucciantini, Andrei Bykov, Douglas A. Swartz, Rolf Buehler

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

We report on Chandra X-ray Observatory (CXO) observations of the pulsar wind nebula (PWN) associated with PSR B0355+54 (eight observations with a 395 ks total exposure, performed over an eight month period). We investigated the spatial and spectral properties of the emission coincident with the pulsar, compact nebula (CN), and extended tail. We find that the CN morphology can be interpreted in a way that suggests a small angle between the pulsar spin axis and our line of sight, as inferred from the radio data. On larger scales, emission from the 7′(≈2 pc) tail is clearly seen. We also found hints of two faint extensions nearly orthogonal to the direction of the pulsar's proper motion. The spectrum extracted at the pulsar position can be described with an absorbed power-law + blackbody model. The nonthermal component can be attributed to magnetospheric emission, while the thermal component can be attributed to emission from either a hot spot (e.g., a polar cap) or the entire neutron star surface. Surprisingly, the spectrum of the tail shows only a slight hint of cooling with increasing distance from the pulsar. This implies either a low magnetic field with fast flow speed, or particle reacceleration within the tail. We estimate physical properties of the PWN and compare the morphologies of the CN and the extended tail with those of other bow shock PWNe observed with long CXO exposures.

Original languageEnglish (US)
Article number253
JournalAstrophysical Journal
Volume833
Issue number2
DOIs
StatePublished - Dec 20 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • X-rays: general
  • pulsars: individual (PSR B0355+54)
  • stars: neutron

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