Vertical Temperature Structures of the Solar Corona Derived with the Hinode X-Ray Telescope
Golub, Leon; Hara, Hirohisa; Shimojo, Masumi; Narukage, Noriyuki; Sakao, Taro; Tsuneta, Saku; Shibasaki, Kiyoto; Shimizu, Toshifumi; Kotoku, Jun'ichi; Kano, Ryouhei; Matsuzaki, Keiichi; Bando, Takamasa; Deluca, Edward; Lundquist, Loraine; Nakatani, Ichiro
Japan, United States
Abstract
We obtained temperature structures in faint coronal features above and near the solar limb with the X-Ray Telescope aboard the Hinode satellite by accurately correcting the scattered X-rays from surrounding bright regions with occulted images during the solar eclipses. Our analysis yields a polar coronal hole temperature of about 1.0MK and an emission measure in the range of 1025.5-1026.0cm-5. In addition, our methods allow us to measure the temperature and emission measure of two distinct quiet-Sun structures: radial (plume-like) structures near the boundary of the coronal-hole and diffuse quiet Sun regions at mid-latitudes. The radial structures appear to have increasing temperature with height during the first 100Mm, and constant temperatures above 100Mm. For the diffuse quiet-Sun region the temperatures are the highest just above the limb, and appear to decrease with height. These differences may be due to different magnetic configurations.