Orbital modulation of X-ray emission lines in Cygnus X-3
نویسندگان
چکیده
منابع مشابه
Orbital modulation of X - ray emission lines in Cygnus X - 3 .
Aims. We address the problem where the X-ray emission lines are formed and investigate orbital dynamics using Chandra HETG observations, photoionizing calculations and numerical wind-particle simulations. The aims were to set constraints on the masses of the components of this close binary system consisting of a Wolf-Rayet (WR) star and a compact component and to investigate the nature of the l...
متن کاملOrbital Dynamics of Cygnus X - 3
Orbital-phased-resolved infrared spectra of Cygnus X-3 in outburst and quiescence, including tomo-graphic analysis, are presented. We confirm the phasing of broad He ii and N v lines in quiescence, such that maximum blue shift corresponds to the X-ray minimum at Φ = 0.00 ± 0.04. In outburst, double-peaked He i structures show a similar phasing with two significant differences: (a) although vary...
متن کاملCygnus X-1: X-ray Emission Mechanism and Geometry
On 1996 May 10, the All-Sky Monitor aboard RXTE revealed that Cyg X–1 started a transition from its hard state to soft state (Cui 1996). Throughout this interesting episode, snapshots were taken with more sensitive detectors on ASCA, RXTE, and CGRO to monitor the temporal and spectral variability of the source over a broad energy range. The results (both spectral and temporal) from these observ...
متن کاملJet radio emission in Cygnus X-1 and its orbital modulation
We present results of our detailed theoretical study of the observed orbital modulation of the radio emission in Cyg X-1. The modulation occurs due to free-free absorption in the wind from the companion star varying with the orbital phase, and our results put strong constraints on the spatial distribution of the jet radio emission at the frequencies of 2–15 GHz. A crucial role in enhancing the ...
متن کاملNew Measurements of Orbital Period Change in Cygnus X - 3
A nonlinear nature of the binary ephemeris of Cygnus X-3 indicates either a change in the orbital period or an apsidal motion of the orbit. We have made extended observations of Cygnus X-3 with the Pointed Proportional Counters (PPCs) of the Indian X-ray Astronomy Experiment (IXAE) during 1999 July 3−13 and October 11−14. Using the data from these observations and the archival data from ROSAT, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200811293