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PROPELLER EFFECT in the TRANSIENT X-RAY PULSAR SMC X-2
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2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 834, no 2, 209Article in journal (Refereed) Published
Abstract [en]

We report the results of the monitoring campaign of the transient X-ray pulsar SMC X-2 performed with the Swift/XRT telescope over the period of 2015 September-2016 January during the Type II outburst. During this event, the bolometric luminosity of the source ranged from ≃1039 down to several ×1034 erg s-1. Moreover, we discovered its dramatic drop by a factor of more than 100 below the limiting value of erg s-1, which can be interpreted as a transition to the propeller regime. These measurements make SMC X-2 the sixth pulsating X-ray source where such a transition is observed and allow us to estimate the magnetic field of the neutron star in the system B ≃ 3 × 1012 G, which is in agreement with independent results of the spectral analysis. 

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2017. Vol. 834, no 2, 209
Keyword [en]
accretion, accretion disks, magnetic fields, stars: individual (SMC X-2), X-rays: binaries
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-202224DOI: 10.3847/1538-4357/834/2/209ISI: 000400149000004Scopus ID: 2-s2.0-85010028374OAI: oai:DiVA.org:kth-202224DiVA: diva2:1082924
Note

 QC 20170320

Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-05-23Bibliographically approved

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