Broad-band mHz QPOs and spectral study of LMC X-4 with AstroSat
- Title
- Broad-band mHz QPOs and spectral study of LMC X-4 with AstroSat
- Creator
- Sharma R.; Jain C.; Rikame K.; Paul B.
- Description
- We report the results of broad-band timing and spectral analysis of data from an AstroSat observation of the high-mass X-ray binary LMC X-4. The Large Area X-ray Proportional Counter (LAXPC) and Soft X-ray Telescope (SXT) instruments onboard the AstroSat observed the source in 2016 August. A complete X-ray eclipse was detected with the LAXPC. The 340 keV power density spectrum showed the presence of coherent pulsations along with a ?26 mHz quasi-periodic oscillation feature. The spectral properties of LMC X-4 were derived from a joint analysis of the SXT and LAXPC spectral data. The 0.525 keV persistent spectrum comprised of an absorbed high-energy cut-off power law with photon index of ? ? 0.8 and cut-off at ?16 keV, a soft thermal component with kTBB ? 0.14 keV, and Gaussian components corresponding to Fe K?, Ne IX, and Ne X emission lines. Assuming a source distance of 50 kpc, we determined 0.525 keV luminosity to be ?2 1038 erg s?1 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
- Source
- Monthly Notices of the Royal Astronomical Society, Vol-519, No. 2, pp. 1764-1770.
- Date
- 2023-01-01
- Publisher
- Oxford University Press
- Subject
- accretion, accretion discs; pulsars: general; stars: neutron; X-rays: binaries; X-rays: individual: LMC X-4
- Coverage
- Sharma R., Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Karnataka, Bengaluru, 560080, India; Jain C., Hansraj College, University of Delhi, Delhi, 110007, India; Rikame K., Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Karnataka, Bengaluru, 560080, India, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Paul B., Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Karnataka, Bengaluru, 560080, India
- Rights
- All Open Access; Green Open Access
- Relation
- ISSN: 358711; CODEN: MNRAA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Sharma R.; Jain C.; Rikame K.; Paul B., “Broad-band mHz QPOs and spectral study of LMC X-4 with AstroSat,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/14412.