Weakly broadened iron line in the X-ray spectrum of the ultraluminous X-ray source M82 X-1
نویسندگان
چکیده
منابع مشابه
Black Hole Mass of the Ultraluminous X-ray Source M82 X-1
We report first clear evidence for the simultaneous presence of a low frequency break and a QPO in the power spectrum of a well known ultralumnious X-ray source (ULX) in M82 using long XMMNewton observations. The break occurs at a frequency of 34.2 −3 mHz. The QPO has a centroid at νQPO = 114.3± 1.5 mHz, a coherence Q ≡ νQPO/∆νFWHM ≃ 3.5 and an amplitude (rms) of 19% in the 2− 10 keV band. The ...
متن کاملA Major X-ray Outburst from an Ultraluminous X-ray Source in M82
We detected a major X-ray outburst from M82 with a duration of 79 days, an average flux of 5×10 erg cm s in the 2-10 keV band, and strong variability. The X-ray spectrum remained hard throughout the outburst. We obtained a Chandra observation during the outburst that shows that the emission arises from the ultraluminous X-ray source X41.4+60. This source has an unabsorbed flux of (5.4± 0.2)× 10...
متن کاملThe X - ray spectral evolution of the ultraluminous X - ray source Holmberg IX X - 1
We present a new analysis of X-ray spectra of the archetypal ultraluminous X-ray source (ULX) Holmberg IX X-1 obtained by the Swift, XMM-Newton and NuSTAR observatories. This ULX is a persistent source, with a typical luminosity of ∼10 erg s, that varied by a factor of 4 – 5 over eight years. We find that its spectra tend to evolve from relatively flat or two-component spectra in the medium ene...
متن کاملOrigin of the X-ray Quasi-periodic Oscillations and Identification of a Transient Ultraluminous X-ray Source in M82
The starburst galaxy M82 contains two ultraluminous X-ray sources (ULXs), CXOM82 J095550.2+694047 (=X41.4+60) and CXOM82 J095551.1+694045 (=X42.3+59), which are unresolved by XMM-Newton. We revisited the two XMM-Newton observations of M82 and analyzed the surface brightness profiles using the known Chandra source positions. We show that the quasi-periodic oscillations (QPOs) detected with XMM-N...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2011
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2011.19615.x