Abstract
From simultaneous filtergrams taken in opposite wings of the λ6569.2 solar absorption line we derive the velocity profile of an average solar granule. We definitely established the existence of the horizontal outflow in a granule in addition to the vertical upflow at the granule center. The magnitude of this outflow is strongly dependent on the influence of instrumental and atmospheric smoothing and on the effective height in the solar atmosphere at which the velocity is measured. The maximum upflow (at the granule center) equals 0.4 km/sec, the maximum outflow (500 km from the granule center) equals 0.25 km/sec.
Similar content being viewed by others
References
Beckers, J. M.: 1968, Solar Phys. 3, 258.
Beckers, J. M. and Parnell, R. L.: 1969, Solar Phys. 9, 39.
Bernière, G., Michard, R., and Rigal, G.: 1962, Ann. Astrophys. 25, 279.
Edmonds, F. N.: 1962, Astrophys. J. 136, 507.
DeJager, C.: 1959, Handbuch der Physik, Vol. 52, Springer-Verlag, Berlin, p. 96.
Leighton, R. E.: 1963, Ann. Rev. Astron. Astrophys. 1, 19.
Namba, O. and Diemel, W. E.: 1969, Solar Phys. 7, 167.
Parnell, R. L. and Beckers, J. M.: 1969, Solar Phys. 9, 35.
Richardson, R. S. and Schwarzschild, M.: 1950, Astrophys. J. 111, 351.
Servajean, R.: 1961, Ann. Astrophys. 24, 1.
Simon, G. W.: 1966, Trans. IAU XIIB, 164.
Stuart, F. E. and Rush, J. H.: 1954, Astrophys. J. 120, 245.
Unsöld, A.: 1955, Physik der Sternatmosphären, 2nd ed., Springer-Verlag, Berlin.
Author information
Authors and Affiliations
Additional information
Part of the research reported here was carried out while the author was at the High Altitude Observatory, Boulder, Colorado.
Rights and permissions
About this article
Cite this article
Beckers, J.M., Morrison, R.A. The interpretation of velocity filtergrams. Sol Phys 14, 280–293 (1970). https://doi.org/10.1007/BF00221314
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00221314