A New Measurement of the Spin and Orbital Parameters of the High Mass X-ray Binary Centaurus X-3 using AstroSat
| Autor: | Shirke, Parisee, Bala, Suman, Roy, Jayashree, Bhattacharya, Dipankar |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | J.Astrophys.Astron. 42 (2021) 58 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s12036-021-09710-w |
| Popis: | We present the timing results of out-of-eclipse observations of Centaurus X-3 spanning half a binary orbit, performed on 12-13 December, 2016 with the Large Area X-ray Proportional Counter (LAXPC) on-board AstroSat. The pulse profile was confirmed to exhibit a prominent pulse peak with a secondary inter-pulse. The systemic spin period of the pulsar was found to be $4.80188 \pm 0.000085$ s in agreement with its spin up trend. The spin up timescale seems to have increased to $7709 \pm 58$ yr that points to negative torque effects in the inner accretion disk. We also report the derived values of projected semi-major axis and orbital velocity of the neutron star. Comment: Accepted for publication in the Special Issue of Journal of Astrophysics and Astronomy on AstroSat: Five Years in Orbit, 7 pages, 6 figures |
| Databáze: | arXiv |
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