Abstract
Before the observation of the 1974 U Ori eruption, it was considered that the Mira stars had only some regular OH variations. With this eruption, we realized that sometimes flares can occur in this type of star. In the course of an OH Mira star monitoring programme with the Nançay radio telescope, we have discovered a new eruptive type of OH maser emission in several sources. Especially, in early 1992, we observed a quickly rising 1665 Mhz emission in the Mira X Oph. The main characteristics of this flare were: large flux variations independent of the light curve; large degree of circular polarization; radial velocity emission close to the stellar velocity.
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References
Bowers, P. F., Hagen, W.: 1984,ApJ 285, 637
Bowers, P. F., Johnston, K. J.: 1988,ApJ 330, 339
Bujarrabal, V., Planesas, P., del Romero, A.: 1987,A&A 175, 164
Chapman, J. D., Cohen, R. J.: 1985,MNRAS 212, 375
Cimerman, M.: 1979,ApJ (letters) 228, L79
Fernie, J. D.: 1959,publication of the Goethe Link Observatory, Indiana Univ. 33, 611
Fix, J. D., Mutel, R. L., Benson, J. M., Claussen, M. L.: 1980,ApJ (letters) 241, L95
Jewell,P. R., Elitzur, M., Webber, J. C., Snyder, L. E.: 1979,ApJ Suppl. 41, 191
Jewell,P. R., Webber, J. C., Snyder, L. E.: 1981,ApJ 249, 118
Reid, M. j., Muhleman, D. O., Moran, J. M., Johnston, K. J., Schwartz, P. R.: 1977,ApJ 214, 60
Reid, M. J., Moran, J. M., Leach, R. W., Ball, J. A., Johnston, K. J., Spencer, J. H., Swenson, G. W.: 1979,ApJ (letters) 227, L92
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Etoka, S., Le Squeren, A.M. A flare in the mira X oph. Astrophys Space Sci 224, 455–456 (1995). https://doi.org/10.1007/BF00667902
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DOI: https://doi.org/10.1007/BF00667902