Abstract
THE centre of our Galaxy is known to contain a large condensation of mass1, and it has been suggested that a massive black hole (of several million solar masses) is located there. Massive black holes have been proposed to explain active galactic nuclei, and if the Galactic Centre is a less-powerful version of such sources it should radiate X-rays and γ-rays1. But although earlier observations2–6 have shown that the region does emit X-rays and y-rays, the true centre, corresponding to the object Sagittarius A*, does not emit strongly at least up to energies of 30 keV (refs 4–6). Whether Sgr A* emits radiation at higher energies, however, was not resolved. Here we present the results of a deep imaging survey of the Galactic Centre, performed with the Sigma/GRANAT tele-scope. We determine the locations of the nine hard X-ray sources— six of them being observed for the first time in the spectral band— to an accuracy of about 2 arcmin, but find no source associated with Sgr A*. The hard X-ray luminosity of Sgr A* is a factor of 4 × 107 less than that expected for a black hole of a million solar masses accreting gas at the maximum stable rate, challenging the idea that there is a black hole at the Galactic Centre.
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References
Genzel, R. & Townes, C. H. A. Rev. Astr. Astrophys. 25, 377–423 (1987).
Gehrels, N. & Tueller, J. Astrophys. J. 407, 597–605 (1993).
Watson, M. G., Willingale, R., Grindlay, J. & Hertz, P. Astrophys. J. 250, 142–154 (1981).
Skinner, G. K. et al. Nature 330, 544–547 (1987).
Hertz, P. & Grindlay, J. E. Astrophys. J. 278, 137–149 (1984).
Pavlinsky, M. N., Grebenev, S. A. & Sunyaev, R. Astrophys. J. 425, 110–121 (1994).
Paul, J. et al. Adv. Space Res. 11, 289–302 (1991).
Cook, W. R. et al. Astrophys. J. 372, L75–L78 (1991).
Covault, C, Manandhar, R. & Grindlay, J. Proc. 22nd Int. Cosmic Ray Conf. Dublin Vol. 1 21–24 (1991).
Sunyaev, R. et al. Astr. Astrophys. 247, L29–L32 (1991).
Cordier, B. et al. Astr. Astrophys. 272, 277–284 (1993).
Bouchet, L. et al. Astrophys. J. 383, L45–L48 (1991).
Sunyaev, R. et al. Astrophys. J. 383, L49–L52 (1991).
Cordier, B. et al. Astr. Astrophys. 275, L1–L4 (1993).
Gilfanov, M. et al. Astrophys. J. 418, 844–849 (1993).
Goldwurm, A. in Proc. of Capri Workshop on Imaging in High Energy Astronomy (eds Bassani, L. & Di Cocco, G.) (Bologna, Italy, in the press).
Gilfanov, M. et al. in Proc. 4th A. Astr. Maryland Conf. College Park, Maryland, USA (in the press).
Barret, D. et al. Astrophys. J. 379, L21–L24 (1991).
Claret, A. et al. Astrophys. J. 423, 436–440 (1994).
Laurent, P. et al. Astr. Astrophys. 278, 444–448 (1993).
Churazov, E. et al. Astrophys. J. Suppl. Ser. 92, 381–385 (1994).
Zhao, J. et al. Science 255, 1538–1543 (1992).
Cox, P. & Laureijs, R. in The Center of the Galaxy (ed. Morris, M.) 121–128 (IAU Kluwer, Symp. No. 136, Dordrecht, 1989).
Markevitch, M., Sunyaev, R. A. & Pavlinsky, M. N. Nature 364, 40–42 (1993).
Mastichiadis, A. & Ozernoy, L. M. Astrophys. J. 426, 599–603 (1994).
Melia, F. Astrophys. J. 426, 577–585 (1994).
Malet, I. et al. Astrophys. J. (in the press).
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Goldwurm, A., Cordier, B., Paul, J. et al. Possible evidence against a massive black hole at the Galactic Centre. Nature 371, 589–591 (1994). https://doi.org/10.1038/371589a0
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DOI: https://doi.org/10.1038/371589a0
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