Abstract
Soft γ-ray repeaters (SGRs) are transient sources of high-energy photons, whose brief emissions are thought to arise from young1 and highly magnetized2,3,4,5,6 neutron stars. The exact cause of these outbursts, and the nature of the energy-loss mechanism that powers them, remain unknown. Here we report the discovery of a fading radio source within the X-ray error box of SGR1900+14. We argue that the radio source is a short-lived cloud of ionized gas, powered by relativistic particles ejected at the time of the intense burst of high-energy photons in late August 1998 (this period of activity also included an extremely energetic burst of γ-rays7 on 27 August). As the radio photons are not beamed, our observations allow us to constrain the energy released in the form of particles ejected during the burst. Moreover, the astrometrical precision of radio observations enable us to determine the exact position of the source to very high accuracy.
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References
Kulkarni, S. R. & Frail, D. A. Identification of a supernova-remnant coincident with the soft γ-ray repeater SGR1806−20. Nature 365, 33–35 (1993).
Thompson, C. & Duncan, R. C. The soft gamma repeaters as very strongly magnetized neutron stars—I. Radiative mechanism for outbursts. Mon. Not. R. Astron. Soc. 275, 255–300 (1995).
Thompson, C. & Duncan, R. C. The soft gamma repeaters as very strongly magnetized neutron stars. II. Quiescent neutrino, X-ray, and Alven wave emission. Astrophys. J. 473, 322–342 (1996).
Mazets, E. P., Golenetskii, S. V., Il'inskii, V. N., Aptekar', R. L. & Gur'yan, Yu. A. Observations of a flaring X-ray pulsar in Dorado. Nature 282, 587–589 (1979).
Kouveliotou, C. et al. An X-ray pulsar with a super-strong magnetic field in the soft γ-ray repeater SGR1806−20. Nature 393, 235–237 (1998).
Hurley, K. et al. Agiant periodic flare from the soft γ-ray repeater SGR1900+14. Nature 397, 41–43 (1999).
Cline, T. L., Mazets, E. P. & Golenetskii, S. V. IAU Circ. No. 7002 (1998).
Mazets, E. P., Golenetskii, S. V. & Gur'yan, Yu. A. Soft gamma-ray bursts from the source B1900+14. Sov. Astron. Lett. 5, 343–344 (1979).
Kouveliotou, C. et al. Recurrent burst activity from the soft γ-ray repeater SGR1900+14. Nature 362, 728–730 (1993).
Vasisht, G., Kulkarni, S. R., Frail, D. A. & Griener, G. Supernova candidates for the soft γ-ray repeater 1900+14. Astrophys. J. 431, L35–L38 (1994).
Kouveliotou, C. et al. The rarity of soft γ-ray repeaters deduced from reactivation of SGR1806-20. Nature 368, 125–127 (1994).
Hurley, K. et al. Network synthesis localization of two soft gamma repeaters. Astrophys. J. 431, L31–L34 (1994).
Hurley, K. et al. Apossible X-ray counterpart to SGR 1900+14. Astrophys. J. 463, L13–L16 (1996).
Windhorst, R. A., Fomalont, E. B., Partridge, R. B. & Lowenthal, J. D. Astrophys. J. 405, 498–517 (1993).
Murakami, T. et al. X-ray identification of the soft γ-ray repeater 1806−20. Nature 368, 127–129 (1994).
Kulkarni, S. R., Frail, D. A., Kassim, N. E., Murakami, T. & Vasisht, G. The radio nebula of the soft γ-ray repeater 1806−20. Nature 368, 129–131 (1994).
Vasisht, G., Frail, D. A. & Kulkarni, S. R. Radio monitoring and high-resolution imaging of the soft gamma-ray repeater 1806−20. Astrophys. J. 440, L65–L68 (1995).
Frail, D. A., Vasisht, G. & Kulkarni, S. R. The changing structure of the radio nebula around the soft gamma-ray repeater SGR 1806−20. Astrophys. J. 480, L129–L132 (1997).
Pacholczyk, A. G. Radio Astrophysics Ch. 7 (Freeman, San Francisco, (1970).
Scott, M. A. & Readhead, A. C. S. The low frequency structure of powerful radio sources and limits to departures from equipartition. Mon. Not. R. Astron.a Soc. 180, 539–550 (1977).
Thompson, C. & Blaes, O. Magnetohydrodynamics in the extreme relativistic limit. Phys. Rev. D 57, 3219–3234 (1998).
Kulkarni, S. R. et al. Optical and infrared observations of SGR 1806−20. Astrophys. J. 440, L61–L64 (1995).
van Kerkwijk, M. H., Kulkarni, S. R., Matthews, K. & Neugebauer, G. Aluminous companion to SGR 1806−20. Astrophys. J. 44, L33–L35 (1995).
Acknowledgements
The National Radio Astronomy Observatory is a facility of the NSF operated under cooperative agreement by Associated Universities, Inc. D.A.F. thanks C. Thompson and M. Goss for discussions. We thank B. Clark and M. Goss for their long-term support in the search for SGR1900+14. S.R.K. is supported by the NSF and NASA.
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Frail, D., Kulkarni, S. & Bloom, J. An outburst of relativistic particles from the soft γ-ray repeater SGR1900+14. Nature 398, 127–129 (1999). https://doi.org/10.1038/18163
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DOI: https://doi.org/10.1038/18163
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