A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Orbital parameters of V 0332+53 from 2015 giant outburst data
Tekijät: Doroshenko V, Tsygankov S, Santangelo A
Kustantaja: EDP SCIENCES S A
Julkaisuvuosi: 2016
Journal: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: ASTRONOMY & ASTROPHYSICS
Lehden akronyymi: ASTRON ASTROPHYS
Artikkelin numero: ARTN A72
Vuosikerta: 589
Sivujen määrä: 4
ISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/201527756
Tiivistelmä
We present the updated orbital solution for the transient Be X-ray binary V 0332 + 53, which we obtained by complementing historical measurements with the data from the gamma-ray burst monitor onboard Fermi. These were acquired during the outburst in June-October 2015. We modeled the observed changes in the spin-frequency of the pulsar and deduced the orbital parameters of the system. We significantly improved existing constrains and show that contrary to previous findings, no change in orbital parameters is required to explain the spin evolution of the source during the outbursts in 1983, 2005, and 2015. The reconstructed intrinsic spin-up of the neutron star during the latest outburst is found to be comparable with previously observed values and predictions of the accretion torque theory.
We present the updated orbital solution for the transient Be X-ray binary V 0332 + 53, which we obtained by complementing historical measurements with the data from the gamma-ray burst monitor onboard Fermi. These were acquired during the outburst in June-October 2015. We modeled the observed changes in the spin-frequency of the pulsar and deduced the orbital parameters of the system. We significantly improved existing constrains and show that contrary to previous findings, no change in orbital parameters is required to explain the spin evolution of the source during the outbursts in 1983, 2005, and 2015. The reconstructed intrinsic spin-up of the neutron star during the latest outburst is found to be comparable with previously observed values and predictions of the accretion torque theory.
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