The complex enviroment around Cir X-1

Research output: Chapter in Book/Report/Conference proceedingChapter

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.
Original languageEnglish
Title of host publicationInternational Conference on Astrophysics of Compact Objects
Pages245-247
Number of pages3
Publication statusPublished - 2008

Publication series

NameAIP CONFERENCE PROCEEDINGS

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geometry
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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

Research output: Chapter in Book/Report/Conference proceedingChapter

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, pp. 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. p. 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. pp. 245-247 (AIP CONFERENCE PROCEEDINGS).
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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.",
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AU - Iaria, Rosario

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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.

KW - Accretion and accretion disks

KW - Neutron stars

KW - X-ray

KW - X-ray binaries

UR - http://hdl.handle.net/10447/46435

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BT - International Conference on Astrophysics of Compact Objects

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