Abstract Details
| Name: md shah alam Affiliation: jamia millia islamia new delhi 110025 Conference ID: ASI2015_509 Title : Simultaneous Appearance of Millihertz QPO and Broad Iron Line from Black Hole Binary System LMC X-1 Authors and Co-Authors : G. C. Dewangan(Inter-University Centre for Astronomy & Astrophysics (IUCAA), Pune, 411007 India) T. Belloni (INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807, Merate, Italy; tomaso.belloni@brera.inaf.it) D. Mukherjee (Inter-University Centre for Astronomy & Astrophysics (IUCAA), Pune, 411007 India) S. Jhingan (Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025, India) Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We present the timing and energy spectral analysis of the black hole X-ray binary LMC X-1 using XMM-Newton and Suzaku observations. We report the discovery of low frequency ~ 26-29 mHz quasi-periodic oscillations (QPOs) with weak fractional rms amplitude in the ~ 1-2 % range and quality factor Q % 2-10. The energy spectra consists of three components - multicolour disk blackbody kTin ~ 0.7-0.9 keV, high energy power-law tail (Gamma ~ 2.4-3.3) and a broad iron line at 6.4-6.9 keV. The broad iron line, the QPO and the strong power-law component are not always present but the QPOs and the broad iron line appear to be clearly detected in the presence of a strong power-law component. The broad iron line is found to be weaker when the disk is likely truncated and absent when the power-law component almost vanished. These results suggest that the QPO and the broad iron line together can be used to probe the dynamics of the accretion disk and the corona. |