The complex enviroment around Cir X-1

Risultato della ricerca: Chapter

Abstract

We present the results of a 54 ks long Chandra observation of the peculiar source Cir X-1. We perform a comparative analysis of X-ray spectra, selected at different flux levels of the source. This allows us to distinguish between a very hard state, at a low countrate, and a brighter, softer, highly absorbed spectrum during episodes of flaring activity. The spectrum of the hard state clearly shows emission lines of highly ionized elements. During the flaring state, the spectrum also shows strong resonant absorption lines, mostly in the Fe K region. Physical implications on the changing system geometry and plasma behavior is discussed and compared with past observations.
Lingua originaleEnglish
Titolo della pubblicazione ospiteInternational Conference on Astrophysics of Compact Objects
Pagine245-247
Numero di pagine3
Stato di pubblicazionePublished - 2008

Serie di pubblicazioni

NomeAIP CONFERENCE PROCEEDINGS

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geometry
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cita questo

Di Salvo, T., D'Ai', A., & Iaria, R. (2008). The complex enviroment around Cir X-1. In International Conference on Astrophysics of Compact Objects (pagg. 245-247). (AIP CONFERENCE PROCEEDINGS).

The complex enviroment around Cir X-1. / Di Salvo, Tiziana; D'Ai', Antonino; Iaria, Rosario.

International Conference on Astrophysics of Compact Objects. 2008. pag. 245-247 (AIP CONFERENCE PROCEEDINGS).

Risultato della ricerca: Chapter

Di Salvo, T, D'Ai', A & Iaria, R 2008, The complex enviroment around Cir X-1. in International Conference on Astrophysics of Compact Objects. AIP CONFERENCE PROCEEDINGS, pagg. 245-247.
Di Salvo T, D'Ai' A, Iaria R. The complex enviroment around Cir X-1. In International Conference on Astrophysics of Compact Objects. 2008. pag. 245-247. (AIP CONFERENCE PROCEEDINGS).
Di Salvo, Tiziana ; D'Ai', Antonino ; Iaria, Rosario. / The complex enviroment around Cir X-1. International Conference on Astrophysics of Compact Objects. 2008. pagg. 245-247 (AIP CONFERENCE PROCEEDINGS).
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N2 - We present the results of a 54 ks long Chandra observation of the peculiar source Cir X-1. We perform a comparative analysis of X-ray spectra, selected at different flux levels of the source. This allows us to distinguish between a very hard state, at a low countrate, and a brighter, softer, highly absorbed spectrum during episodes of flaring activity. The spectrum of the hard state clearly shows emission lines of highly ionized elements. During the flaring state, the spectrum also shows strong resonant absorption lines, mostly in the Fe K region. Physical implications on the changing system geometry and plasma behavior is discussed and compared with past observations.

AB - We present the results of a 54 ks long Chandra observation of the peculiar source Cir X-1. We perform a comparative analysis of X-ray spectra, selected at different flux levels of the source. This allows us to distinguish between a very hard state, at a low countrate, and a brighter, softer, highly absorbed spectrum during episodes of flaring activity. The spectrum of the hard state clearly shows emission lines of highly ionized elements. During the flaring state, the spectrum also shows strong resonant absorption lines, mostly in the Fe K region. Physical implications on the changing system geometry and plasma behavior is discussed and compared with past observations.

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