Suzaku Detection of Diffuse Hard X-Ray Emission outside Vela X

Marco Miceli, Hiroya Yamaguchi, Rie Yoshii, Koji Mori, Robert Petre, Hiroyuki Uchida, Fabrizio Bocchino, Aya Bamba, Hiroshi Tsunemi, John W. Hewitt, Tea Temim, Satoru Katsuda, Marco Miceli

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6 Citazioni (Scopus)

Abstract

Vela X is a large, 3ı 2ı, radio-emitting pulsar wind nebula (PWN) powered by the Vela pulsar in the Velasupernova remnant. Using four Suzaku/XIS observations pointed just outside Vela X, we have found hard X-rayemission extending throughout the fields of view. The hard X-ray spectra are well represented by a power-law.The photon index was measured to be constant at Γ 2.4, similar to that of the southern outer part of Vela X.The power-law flux decreases with increasing distance from the pulsar. These properties lead us to propose thatthe hard X-ray emission is associated with the Vela PWN. The larger X-ray extension found in this work stronglysuggests that distinct populations of relativistic electrons form the X-ray PWN and Vela X, as was recently inferredfrom multiwavelength spectral modeling of Vela X.
Lingua originaleEnglish
pagine (da-a)S827-S836
Numero di pagine10
RivistaPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume63
Stato di pubblicazionePublished - 2011

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

Miceli, M., Yamaguchi, H., Yoshii, R., Mori, K., Petre, R., Uchida, H., Bocchino, F., Bamba, A., Tsunemi, H., Hewitt, J. W., Temim, T., Katsuda, S., & Miceli, M. (2011). Suzaku Detection of Diffuse Hard X-Ray Emission outside Vela X. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 63, S827-S836.