Abstract
Double pass photoelectric observations are presented of five Caii lines (H, K, 8498 Å, 8542 Å, and 8662 Å) in a number of solar plages of different degrees of activity, quiet regions, and a sunspot. The data are compared with previous work. All five lines show increasing emission together in plages and the least opaque of the infrared triplet lines appears to exhibit core emission prior to the more opaque members of the multiplet. The question of source function equality is considered and the differences and similarities among plage profiles and between plage and quiet profiles are shown qualitatively and quantitatively.
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References
Brault, J. W., Slaughter, C. O., Pierce, A. K., and Aikens, R. S.: 1971, Solar Phys. 18, 366.
Brault, J. W. and White, O. R.: 1971, Astron. Astrophys. 13, 169.
Carbon, D., Gingerich, O., and Kurucz, R.: 1968, Solar Phys. 3, 55.
d'Azambuja, L. and d'Azambuja, M.: 1937, Compt. Rend. Acad. Sci. 205, 554.
De Jager, C. and Neven, L.: 1967, Bull. Astron. Inst. Neth. Suppl. Series 1, 325.
Engvold, O.: 1967, Solar Phys. 2, 234.
Gingerich, O., Noyes, R. W., Kalkofen, W., and Cuny, Y.: 1971, Solar Phys. 18, 347.
Goldberg, L., Mohler, O. C., and Muller, E. A.: 1959, Astrophys. J. 129, 119.
Holweger, H.: 1970, Astron. Astrophys. 4, 11.
Houtgast, J.: 1970, Solar Phys. 15, 273.
Linsky, J. L.: 1968, Smithsonian Spec. Rept., No. 290.
Linsky, J. L.: 1970, Solar Phys. 11, 355.
Linsky, J. L. and Avrett, E. H.: 1970, Publ. Astron. Soc. Pacific 82, 169.
Linsky, J. L., Teske, R. G., and Wilkinson, C. W.: 1970, Solar Phys. 11, 374.
Liu, S. Y. and Sheeley, N. R.: 1971, Solar Phys. 20, 282.
Mount, G. H.: 1968, unpublished.
Mustel, E. R. and Tsap, T. T.: 1968, Izv. Krymsk. Astrofiz. Obs. 20, 74.
Pierce, A. K.: 1971, private communication.
Sheeley, N. R.: 1967, Astrophys. J. 147, 1106.
Smith, E. van P.: 1969, Astrophys. J. 132, 202.
Stair, R., Schneider, W. E., and Jackson, J. K.: 1963, Appl. Opt. 2, 1151.
Teske, R. G.: 1967, Publ. Astron. Soc. Pacific 79, 110.
Title, A.: 1966, Selected Spectroheliograms, Mount Wilson and Palomar Observatories, Pasadena.
White, O. R. and Suemoto, Z.: 1968, Solar Phys. 3, 523.
Zirker, J. B.: 1965, Smithsonian Spec. Rept., No. 174, p. 397.
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Staff Member, Laboratory Astrophysics Division, National Bureau of Standards.
Visiting Astronomer at Kitt Peak National Observatory, which is operated by the Association of Universities for Research in Astronomy. Inc., under contract with the National Science Foundation.
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Shine, R.A., Linsky, J.L. Physical properties of solar chromospheric plages. Sol Phys 25, 357–379 (1972). https://doi.org/10.1007/BF00192335
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DOI: https://doi.org/10.1007/BF00192335