Abstract
The fine structure of the FeI λ 532.4185-nm line of neutral iron is studied with high spatial (0.5″) and temporal (9.3 s) resolution using observations of a quiet region at the center of the solar disk. The character of the line asymmetry depends strongly on the nature of the velocity field, i.e., on whether it is due to convective or wave motions. The magnitude of the asymmetry due to acoustic waves is comparable to that due to convective motions. The propagation of acoustic waves in moving granules and intergranular lanes is studied by solving a system of hydrodynamical equations in a three-dimensional model for the solar atmosphere. The temporal variations in the bisector of the line synthesized in a non-LTE approximation agree well with the observational data.
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References
L. Bierman, Z. Astrophys. 25, 161 (1948).
G. Eriksen and P. Maltby, Astrophys. J. 148, 833 (1967).
B. T. Babii and A. D. Al'tman, Soln. Dannye, No. 5, 103 (1969).
R. B. Teplitskaja, Sol. Phys. 6, 18 (1969).
R. I. Kostik and T. V. Orlova, Sol. Phys. 36, 279 (1974).
A. Hanslmeier, A. Kučera, J. Rybák, et al., Astron. Astrophys. 356, 308 (2000).
A. Hanslmeier, A. Kučera, J. Rybák, and H. Wöhl, in The Dynamic Sun, Ed. by A. Hanslmeier, M. Messerotti, and A. Veronig (Kluwer, Dordrecht, 2001), p. 267.
E. H. Schröter, D. Soltau, and E. Wiehr, Vistas Astron. 28, 519 (1985).
N. G. Shchukina and J. Trujillo Bueno, Sol. Phys. 172, 117 (1997).
R. I. Kostyk and N. G. Shchukina, Pis'ma Astron. Zh. 25, 781 (1999) [Astron. Lett. 25, 678 (1999)].
E. U. Khomenko, R. I. Kostik, and N. G. Shchukina, Astron. Astrophys. 369, 660 (2001).
M. Steffen, H. G. Ludwig, and A. Kruss, Astron. Astrophys. 213, 371 (1989).
A. S. Gadun, Kinematika Fiz. Nebesnykh Tel 11, 44 (1995).
A. Nordlund, Small-Scale Dynamical Processes in Quiet Stellar Atmospheres, Ed. by S. L. Keil (Sac. Peak. Observatory, Sunspot, 1984), p. 181.
M. Asplund, A. Nordlund, R. Trampedach, et al., Astron. Astrophys. 550, 970 (2001).
E. A. Spiegel, Astrophys. J. 126, 202 (1957).
B. W. Mihalas and J. Toomre, Astrophys. J. 263, 386 (1982).
R. W. Noyes and R. B. Leighton, Astrophys. J. 138, 631 (1963).
B. Shmieder, Sol. Phys. 47, 435 (1976).
C. Marmolino and R. T. Stebbins, Sol. Phys. 124, 23 (1989).
L. Bertello and B. Caccin, Astron. Astrophys. 231, 509 (1990).
C. Marmolino and G. Severino, Astron. Astrophys. 242, 271 (1991).
P. Maltby, E. H. Avrett, M. Carlsson, et al., Astrophys. J. 306, 284 (1986).
N. G. Shchukina and J. Trujillo Bueno, Astrophys. J. 550, 970 (2001).
N. G. Shchukina and J. Trujillo Bueno, Kinematika Fiz. Nebesnykh Tel 14, 315 (1998).
L. H. Auer, P. Fabiani Bendicho, and J. Trujillo Bueno, Astron. Astrophys. 292, 599 (1994).
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Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 79, No. 11, 2002, pp. 1027–1033.
Original Russian Text Copyright © 2002 by Kostyk, Khomenko.
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Kostyk, R.I., Khomenko, E.V. The effect of acoustic waves on spectral-line profiles in the solar atmosphere: Observations and theory. Astron. Rep. 46, 925–931 (2002). https://doi.org/10.1134/1.1522081
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DOI: https://doi.org/10.1134/1.1522081