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PROPELLER EFFECT IN THE TRANSIENT X-RAY PULSAR SMC X-2
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Number of Authors: 5
2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 834, no 2, 1-5 p., 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 similar or equal to 10(39) down to several x 10(34) erg s(-1). Moreover, we discovered its dramatic drop by a factor of more than 100 below the limiting value of L-lim similar or equal to 4 x 10(36) 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 similar or equal to 3 x 10(12) G, which is in agreement with independent results of the spectral analysis.

Place, publisher, year, edition, pages
2017. Vol. 834, no 2, 1-5 p., 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:su:diva-143490DOI: 10.3847/1538-4357/834/2/209ISI: 000400149000004OAI: oai:DiVA.org:su-143490DiVA: diva2:1103780
Available from: 2017-05-31 Created: 2017-05-31 Last updated: 2017-05-31Bibliographically approved

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