A mechanism for the production of light and dark contrasts in radiatively controlled lines

K. B. Gebbie; R. Steinitz

doi:10.1007/BF00153434

A mechanism for the production of light and dark contrasts in radiatively controlled lines

K. B. Gebbie, R. Steinitz

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5 Scopus citations

Abstract

It is argued that visible contrasts can arise even in a line that is controlled wholly by an external radiation field. Lateral differences in the local shapes of the line absorption profile are shown to account for such contrasts. Two cases are treated explicitly: (a) a profile locally broadened by mass flow, and (b) a profile locally narrower due to the suppression of turbulent velocities, as might result from the presence of magnetic fields.

Original language	English
Pages (from-to)	3-15
Number of pages	13
Journal	Solar Physics
Volume	29
Issue number	1
DOIs	https://doi.org/10.1007/BF00153434
State	Published - 1 Mar 1973
Externally published	Yes

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1007/BF00153434

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abstract = "It is argued that visible contrasts can arise even in a line that is controlled wholly by an external radiation field. Lateral differences in the local shapes of the line absorption profile are shown to account for such contrasts. Two cases are treated explicitly: (a) a profile locally broadened by mass flow, and (b) a profile locally narrower due to the suppression of turbulent velocities, as might result from the presence of magnetic fields.",

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N2 - It is argued that visible contrasts can arise even in a line that is controlled wholly by an external radiation field. Lateral differences in the local shapes of the line absorption profile are shown to account for such contrasts. Two cases are treated explicitly: (a) a profile locally broadened by mass flow, and (b) a profile locally narrower due to the suppression of turbulent velocities, as might result from the presence of magnetic fields.

AB - It is argued that visible contrasts can arise even in a line that is controlled wholly by an external radiation field. Lateral differences in the local shapes of the line absorption profile are shown to account for such contrasts. Two cases are treated explicitly: (a) a profile locally broadened by mass flow, and (b) a profile locally narrower due to the suppression of turbulent velocities, as might result from the presence of magnetic fields.

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A mechanism for the production of light and dark contrasts in radiatively controlled lines

Abstract

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