Abstract
ALTHOUGH objects that emit radio jets have been known for many years, the physical mechanism responsible for the jets has been unclear. Accretion of mass onto a compact object (such as a black hole) has often been invoked in models of their formation1. X-ray emission from such sources is a potentially powerful probe of the processes taking place, because it seems to arise much closer to the central object. Here we report the detection of X-ray and radio emission from the recently discovered2,3 transient source X-ray Nova Scorpii 1994 (GRO J1655 –- 40). The radio outbursts, presumably reflecting the feeding of material into relativistic jets, generally follow bursts of hard X-ray emission (20 – 400 keV) with a delay that varies from a few days to about two weeks. This suggests that the mechanism behind the X-ray emission is not related to the ejection process in a simple way. Nevertheless, GRO J1655 – 40 may be the best example of a compact object/accretion-disk system in which models of jet formation and X-ray production can be tested directly.
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References
Begelman, M. C., Blandford, R. D. & Rees, M. J. Rev. mod. Phys. 56, 255–351 (1984).
Zhang, S. N. et al. IAU Circ. No. 6046 (1994).
Wilson, C. A. et al. IAU Circ. No. 6056 (1994).
Fishman, G. J. et al. in Gamma Ray Observatory Science Workshop (eds Shrader, C. R., Gehrels, N. & Dennis, B.) 2-39–2-50 (CP-3137, NASA, Greenbelt, Maryland, USA, 1989).
Zhang, S. N., Fishman, G. J., Harmon, B. A. & Paciesas, W. S. Nature 366, 245–247 (1993).
Bailyn, C. D. et al. Nature 374, 701–703 (1995).
Campbell-Wilson, D. & Hunstead, R. IAU Circ. Nos 6052 & 6055 (1994).
Campbell-Wilson, D., McKay, D. J. & Lovell, J. E. IAU Circ. No. 6078 (1994).
Hjellming, R. M. & Rupen, M. P. Nature (submitted).
Press, W. H. et al. Numerical Recipes in Fortran 2nd edn 569–577 (Cambridge Univ. Press, 1992).
Kroeger, R. A., Grove, J. E., Kurfess, J. D., Johnson, W. N. & Strickman, M. S. IAU Circ. No. 6051 (1994).
McKay, D. & Kesteven, M. IAU Circ. No. 6062 (1994).
Tingay, S. J. et al. Nature 374, 141–143 (1995).
White, N. E. in The Evolution of X-ray Binaries (eds Holt, S. S. & Day, C. S.) 53–60 (AIP Conf. Proc. 308, Am. Inst. Physics, New York, 1994).
Van Paradijs, J. & McClintock, J. in X-Ray Binaries (eds Lewin, W. H. G. & v. d. Heuvel, E. P. J.) (Cambridge Univ. Press, in the press).
Alexandrovich, N., Borozdin, K., Efremov, V. & Sunyaev, R. IAU Circ. No. 6087 (1994).
Greiner, J. IAU Circ. No. 6078 (1994).
Sazonov, S. Yu. et al. Astr. Lett. 20, 787–791 (1994).
Mirabel, I. F. & Rodriguez, L. F. Nature 371, 46–48 (1994).
Finoguenov, A. et al. Astrophys. J. 424, 940–942 (1994).
Harmon, B. A. et al. in The Second Compton Symposium (eds Fichtel, C. E., Gehrels, N. & Norris, J. P.) 210–219 (AIP Conf. Proc. 304, Am. Inst. Physics, New York, 1993).
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Harmon, B., Wilson, C., Zhang, S. et al. Correlations between X-ray outbursts and relativistic ejections in the X-ray transient GRO J1655 – 40. Nature 374, 703–706 (1995). https://doi.org/10.1038/374703a0
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DOI: https://doi.org/10.1038/374703a0
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