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The Rate of Component Separation in SCO X-1

  • B. J. Geldzahler (a1) (a2), E. B. Fomalont (a1), R. M. Hjellming (a1) and C. M. Wade (a1)

Extract

Sco X-1 was observed in the A configuration of the VLA on 4 Feb. 1981 and 18 Mar. 1982 (Fomalont et al. 1983). The radio map at 1.5 GHz, made with the 1982 data, is shown in Figure 1. The central component is nearly coincident with the binary and has an angular size of less than 0″.1. A 0″.5-resolution map of the SW component of Sco X-1, shown in Figure 2, displays only the brightest peaks in the two emission regions. The brightest part of the emission is located at the extreme edge of the component, and its location and shape are reminiscent of hot spots in radio lobes associated with luminous extragalactic radio sources. Although the NE component is only slightly resolved at this resolution, it is extended in approximately the same position angle as that of the entire source and that of the SW component.

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References

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Blandford, R.D. and Rees, M. J.: 1974, M.N.R.A.S. 169, 395.
Fomalont, E.B., Geldzahler, B.J., Hjellming, R.M., and Wade, C.M.: 1983, Ap. J. in press.
Turner, B.E.: 1979, in The Large-Scale Characteristics of the Galaxy, IAU Symp. 84, ed. Burton, W. B. (Reidel, Dordrecht), 257.

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