Study of Recent outburst in the Be/X-ray binary RX J0209.6-7427 with AstroSat: A new ultraluminous X-ray pulsar in the Magellanic Bridge?
| Autor: | Manojendu Choudhury, Amar Deo Chandra, P. C. Agrawal, Jayashree Roy |
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| Přispěvatelé: | Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India, Inter-University Center for Astronomy and Astrophysics, Post Bag 4, Pune, Maharashtra 411007, India, UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Vidyanagari Campus, Kalina, Santacruz (East), Mumbai, Maharashtra 400098, India |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
X-ray binary FOS: Physical sciences Proportional counter ULX pulsars Astrophysics 01 natural sciences type II outbursts Binary pulsar law.invention Luminosity Telescope Be/X-ray binaries Pulsar law 0103 physical sciences 010303 astronomy & astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Magellanic Bridge 13. Climate action Space and Planetary Science RX J0209.6-7427 [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - High Energy Astrophysical Phenomena Energy (signal processing) X-ray pulsar |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 495 (3), pp.2664-2672. ⟨10.1093/mnras/staa1041⟩ |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | We present the timing and spectral studies of RX J0209.6-7427 during its rare 2019 outburst using observations with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC) instruments on the AstroSat satellite. Pulsations having a periodicity of 9.29 s were detected for the first time by the NICER mission in the 0.2-10 keV energy band and, as reported here, by AstroSat over a broad energy band covering 0.3-80 keV. The pulsar exhibits a rapid spin-up during the outburst. Energy resolved folded pulse profiles are generated in several energy bands in 3-80 keV. To the best of our knowledge this is the first report of the timing and spectral characteristics of this Be binary pulsar in hard X-rays. There is suggestion of evolution of the pulse profile with energy. The energy spectrum of the pulsar is determined and from the best fit spectral values, the X-ray luminosity of RX J0209.6-7427 is inferred to be ${1.6}\times 10^{39}$ ergs s$^{-1}$. Our timing and spectral studies suggest that this source has features of an ultraluminous X-ray pulsar in the Magellanic Bridge. Details of the results are presented and discussed in terms of the current ideas. 9 pages, 8 figures, accepted for publication in MNRAS Journal |
| Databáze: | OpenAIRE |
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