Abstract
Evidence for excess extreme ultraviolet (EUV) emission over a tail of thermal X-ray bremsstrahlung emission has been building up recently. In order to improve the signal to noise ratio in the EUV, we have performed a wavelet based image analysis for five clusters of galaxies observed both at EUV and X-ray energies with the EUVE and ROSAT satellites respectively. The profiles of the EUV and X-ray reconstructed images all differ at a very large confidence level and an EUV excess over a thermal bremsstrahlung tail is detected in all five clusters (Abell 1795, Abell 2199, Abell 4059, Coma and Virgo) up to large radii. Our results tend to suggest that the EUV excess is probably non thermal in origin.
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References
Atoyan A.M. & Völk H.J. 2000, ApJ 535, 45
Berghöfer T.W., Bowyer S. & Korpela E. 2000a, ApJ 535, 615
Berghöfer T.W., Bowyer S. & Korpela E. 2000b, ApJ 545, 695
Bonamente M. Lieu R. & Mittaz J. 2001, ApJ 561, L63
Bowyer S. & Berghofer T.W. 1998, ApJ 506, 502
Bowyer S., Lieu R. & Mittaz J. 1998, in The Hot Universe, ed. K. Koyama, S. Kitamoto & M. Itoh (Dordrecht: Kluwer), 185
Bowyer S., Berghofer T.W. & Korpela E.J. 1999, ApJ 526, 592
Bowyer S., Korpela EJ. & Berghofer T.W. 2001, ApJ 548, 135
Brunetti G., Setti G., Feretti L. & Giovannini G. 2001, MNRAS 320, 365
Durret E, Slezak E., Lieu R., Dos Santos S., Bonamente M. 2002, A&A 390, 397
Ensslin T.A. & Biermann P.L. 1998, A&A 330, 90
Ensslin T.A., Lieu R. & Biermann P.L. 1999, A&A 344, 409
Hwang Z. 1997, Science 278, 1917
Kaastra J.S., Tamura T., Peterson J., Bleeker J. & Ferrigno C. 2001, Proc. Symposium “New visions of the X-ray Universe in the XMM-Newton and Chandra Era”, 26–30 November 2001, ESTEC, The Netherlands
Lieu R., Mittaz J.P.D., Bowyer S. et al. 1996a, Science 274, 1335
Lieu R., Mittaz J.P.D., Bowyer S. et al. 1996b, ApJ 458, L5
Lieu R., Ip W.-H., Axford W.I. & Bonamente M. 1999, ApJ 510, L25
Lieu R., Bonamente M. & Mittaz J.P.D. 2000, A&A 364, 497
Mittaz J.P.D., Lieu R. & Lockman F.J. 1998, ApJ 498, L17
Rué F, Bijaoui A. 1997, Experimental Astronomy 7, 129
Sarazin C.L., Lieu R. 1998, ApJ 494, L177
Snowden S. L., McCammon D., Burrows D. N. & Mendehall J. A. 1994, ApJ 424, 714
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Durret, F., Slezak, E., Lieu, R., Dos Santos, S., Bonamente, M. (2004). The Extreme Ultraviolet Excess Emission in Five Clusters of Galaxies Revisited. In: Lieu, R., Mittaz, J. (eds) Soft X-Ray Emission from Clusters of Galaxies and Related Phenomena. Astrophysics and Space Science Library, vol 309. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2564-8_1
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DOI: https://doi.org/10.1007/978-1-4020-2564-8_1
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