Abstract
Observations of X-ray bright points (XBP) over a six-month interval in 1973 show significant variations in both the number density of XBP as a function of heliographic longitude and in the full Sun average number of XBP from one rotation to the next. The observed increases in XBP emergence are estimated to be quivalent to several large active regions emerging per day for several months. The number of XBP emerging at high latitudes also varies, in phase with the low latitude variation and reaches a maximum approximately simultaneous with a major outbreak of active regions. The quantity of magnetic flux emerging in the form of XBP at high latitudes alone is estimated to be as large as the contribution from all active regions.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Born, R.: 1974, Solar Phys. 38, 127.
Glencross, W. M.: 1975, Astrophys. J. Lett., 199, L53.
Golub, L., Krieger, A. S., Silk, J. K., Timothy, A. F., and Vaiana, G. S.: 1974, Astrophys. J. Lett. 189, L93.
Golub, L., Krieger, A. S., and Vaiana, G. S.: 1975, Solar Phys. 42, 131.
Golub, L.: 1976, Solar Phys. 46, 115.
Golub, L., Krieger, A. S., and Vaiana, G. S.: 1976, Solar Phys. 49, 79.
Haggerty, R., Simon, R., Golub, L., Silk, J. K., Timothy, A. F., Krieger, A. S., and Vaiana, G. S.: 1975, AAS Photo-Bulletin, 10, 8.
Harvey, K., Harvey, J., and Martin, S.: 1975, Solar Phys. 40, 87.
Krieger, A. S., Vaiana, G. S., and Van Speybroeck, L. P.: 1971, in R. Howard (ed.), ‘Solar Magnetic Fields’, IAU Symp. 43, p. 397.
Parker, E. N.: 1975, Astrophys. J. 201, 494.
Sheeley, N. R., Jr.: 1966, Astrophys. J. 144, 723.
Tucker, W. H. and Koren, M.: 1971, Astrophys. J. 168, 283; Erratum 170, 621.
Vaiana, G. S., Krieger, A. S., Petrasso, R. D., Silk, J. K. and Timothy, A. F.: 1974, Proc. SPIE 44, 185.
Vaiana, G. S., Krieger, A. S., Van Speybroeck, L. P., and Zehnpfennig, T.: 1970, Bull. Amer. Phys. Soc. 15, 611.
Author information
Authors and Affiliations
Additional information
Harvard College Observatory/Smithsonian Astrophysical Observatory.
Rights and permissions
About this article
Cite this article
Golub, L., Krieger, A.S. & Vaiana, G.S. Observation of spatial and temporal variations in X-ray bright point emergence patterns. Sol Phys 50, 311–327 (1976). https://doi.org/10.1007/BF00155294
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00155294