Abstract
The SS433 system ejects two relativistic jets with a velocity of 0.26c. The two jets are in oppsite directions, precessing with a period of 160 days1. The system is assumed to include a compact object which rotates around a normal star with a period of 13 days2,3. There are strong indications for the presence of an accretion disk around the compact object4. Based on study of a photometric light curve obtained during 3 years of observations5, we suggest here that the compact object might be a black hole.
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References
Margon, B. Science 215, 247–252 (1982).
Crampton, D., Cowley, A. P. & Hutchings, J. B. Astrophys. J. Lett. 235, L131–L135 (1980).
Crampton, D. & Hutchings, J. B. Vistas Astron. 25, 13–25 (1981).
Kemp, J. C., Barbour, M. S., Kemp, G. N. & Hogood, D. M. Vistas Astron. 25, 31–43 (1981).
Leibowitz, E. M. et al. Mon. Not. R. astr. Soc. (in the press).
Kemp, J. C., Barbour, M. S., Arbabi, M., Leibowitz, E. M. & Mazeh, T. Astrophys. J. Lett. 238, L133–L138 (1980).
Gladyshev, S. A., Kurochkin, N. E., Novikov, I. D. & Cherepashchuk, A. M. (USSR) Astron. Tsirk. No. 1086, 1–8 (1979).
Cherepashchuk, A. M. Mon. Not. R. Astr. Soc. 194, 761–769 (1981).
Gladyshev, S. A. Sov. Astron. Lett. 7, 330–333 (1981).
Mazeh, T., Leibowitz, E. M. & Lahav, O. Astrophys. Letters 22, 185–191 (1981).
Anderson, S. F., Margon, B. & Grandi, S. A. Astrophys. J. 269, 605–612 (1983).
Henson, G. D., Kemp, J. C., Barbour, M. S., Kraus, D. J., Leibowitz, E. M. & Mazeh, T. Astrophys. J. Lett. (in the press).
Russell, H. N. Astrophys. J. 35, 315 (1912).
Whitmire, D. P. & Matese, J. J. Mon. Not. R. Astr. Soc. 194, 293–299 (1981).
Katz, J. I. Astrophys. J. Lett. 236, L127–L130 (1980).
Katz, J. I., Anderson, S. F., Margon, B. & Grandi, S. A. Astrophys. J. 260, 780–793 (1982).
van den Heuvel, E. P. J., Ostriker, J. P. & Peterson, J. A. Astron. Astrophys. 81, L7–L10 (1980).
Hut, P. & van den Heuvel, E. P. J. Astron. Astrophys. 94, 327–332 (1981).
Crampton, D. & Hutchings, J. B. Astrophys. J. 251, 604–610 (1981).
Kundt, W. Nature 282, 52–53 (1979).
Kundt, W. Vistas Astron. 25, 153–164 (1981).
Pratt, J. P. & Strittmatter, P. A. Astrophys. J. Lett. 204, L29–L33 (1976).
Bahcall, J. H. A. Rev. Astr. Astrophys. 16, 241–264 (1978).
Avni, Y. & Schiller, N. Astrophys. J. 257, 703–714 1982).
Leibowitz, E. M. Mon. Not. R. astr. Soc. (submitted for publication).
Joss, P. C. & Rappaport, S. A. Neutron Stars in Interacting Binary Systems CSR-AT-82-10 (1982).
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Leibowitz, E., Mazeh, T. & Mendelson, H. A lower limit for the mass of the compact object in SS433—a black hole?. Nature 307, 341–342 (1984). https://doi.org/10.1038/307341a0
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DOI: https://doi.org/10.1038/307341a0
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