Infrared lines as probes of solar magnetic features
نویسندگان
چکیده
Observations of Ti I lines at 2.2 µm show that the Evershed flow takes place in cool, almost horizontal channels with a low magnetic field strength (≈ 500–900 G) that does not appear to change significantly across the penumbra. This property might allow an outward directed siphon flow to exist along such cool flux tubes.
منابع مشابه
Infrared lines as probes of solar magnetic features XIV . Ti i and the cool components of sunspots
The first systematic observations of sunspot umbrae using the lines of the Ti I multiplet at 2.2 μm are presented. Their diagnostic capabilities are investigated, developed and used to investigate the magnetic and velocity structure of a sunspot. These lines are most sensitive to cool plasma. In addition, they are extremely Zeeman sensitive. We find that a sunspot is composed of two distinct co...
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