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The post-quiescence properties of Cir X-1 at orbital phase around periastron observed by NuSTAR and NICER.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Jan2024, Vol. 527 Issue 3, p8029-8042. 14p. - Publication Year :
- 2024
-
Abstract
- Cir X-1 is an unusual X-ray binary, which has resumed periodic outbursts since August 2019. We investigate the post-quiescence spectral properties of Cir X-1 at orbital phase around the periastron using NICER and NuSTAR X-ray observatories after the resumption of outbursts. We identify two distinct classes of spectral properties. The first class exhibits highly ionized absorption, whereas the second class does not. We suggest that the ionized absorption originates from the shelter of the disc wind, while the low-ionized/neutral absorption arises from the companion's stellar wind. We also suggest that the disc wind may be always present in both classes, and a warped precession disc could alter the visibility of the disc wind. [ABSTRACT FROM AUTHOR]
- Subjects :
- *STELLAR winds
*X-ray binaries
*ACCRETION disks
*OBSERVATORIES
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 527
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 175059627
- Full Text :
- https://doi.org/10.1093/mnras/stad3696