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http://hdl.handle.net/2248/4738| Title: | Radio and EUV measurements of the equatorial coronal hole of February 25, 1999 |
| Authors: | Subramanian, K. R Sundaram, G. A. S |
| Keywords: | Sun EUV Measurements Equatorial Coronal Hole Sunspot Solar Activity Solar Corona |
| Issue Date: | 2005 |
| Publisher: | Astronomical Society of the Pacific |
| Citation: | Sankarasubramanian, K., Penn, Matt., and Pevtsov, Alexei., eds., Large-scale structures and their role in solar activity., Proceedings of the 22nd Sacramento Peak Workshop held at the National Solar Observatory., Astronomical Society of the Pacific Conference Series Vol. 346, Sacramento Peak, Sunspot, New Mexico, 18 - 22 October 2004, USA, pp. 245 – 250 |
| Abstract: | We present here the observations of the equatorial coronal hole made at 109 MHz on February 25, 1999 with the Gauribidanur Radioheliograph. The brightness temperature of this coronal hole is about 1:7£105 K.We compare our observations with EUV measurements of EIT onboard SOHO. Ray-tracing calculations show that the observed brightness temperature of this coronal hole can be due a decrement in density by factor of 4 compared to the Newkirk's density model. |
| URI: | http://hdl.handle.net/2248/4738 |
| ISBN: | 1-58381-214-8 |
| Appears in Collections: | IIAP Publications |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Radio and EUV measurements of the equatorial coronal hole of February 25, 1999Radio and EUV measurements | 216.15 kB | Adobe PDF |  View/Open |
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