Spectroscopic determination of intensities of umbral bright features and adjacent background

Bibcode
1992A&A...260..437S
Sobotka, M.; Bonet, J. A.; Vazquez, M.
Referencia bibliográfica

Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 437-440.

Fecha de publicación:
7
1992
Número de autores
3
Número de autores del IAC
3
Número de citas
11
Número de citas referidas
9
Descripción
Profiles of the Na I D doublet in three bright features (clusters of umbral dots), located in a relatively dark umbra, were analyzed by means of the 'local two-component modeling' to obtain the 'true' continuum intensities and temperatures of the bright features and their dark surroundings (background). The intensities of two central and one peripheral bright feature were 0.31 (background 0.11), 0.33 (0.13), and 0.40 (0.17), respectively. For the ratio of the object and background intensity (assumed to be constant, but unknown until now) the value of 2.6 +/- 0.2 was obtained.
Tipo
Con árbitro
Manchas solares
Ambiente solar

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