D. C. Morton and P. Murdin, Anglo-Australian Observatory; and R. Thomas, University of Tasmania, suggest that the more likely optical candidate for SMC X-2 is the fainter star 2" south of the previously suggested magnitude 15 object (IAUC 3127, 3134, 3143). It is the new candidate (spectral type B1e) that shows the reported H-alpha and H-beta emission; the brighter component of the double star appears to be a normal O7 star.
International Astronomical Union Circular
- Pub Date:
- July 1978