Effect of an X-Class solar flare on the OI 630 nm dayglow emissions

被引：12

作者：

Das, Uma ^{[1
]}

Pallamraju, Duggirala ^{[1
]}

Chakrabarti, Supriya ^{[2
]}

机构：

[1] Phys Res Lab, Space & Atmospher Sci Div, Ahmadabad 380009, Gujarat, India

[2] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2010年 / 115卷

关键词：

D O I：

10.1029/2010JA015370

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a striking event that shows a prompt effect of an X-class solar flare (X6.2/3B) in the neutral optical dayglow emissions. This flare occurred on 13 December 2001 at 1424 UT and peaked at 1430 UT. The peak- to pre-flare X-ray intensity ratio as observed by GOES-10 was greater than 300 and the EUV flux observed by SEM/SOHO was greater by around 60%. As a response to this flare, the daytime redline (OI 630 nm) column integrated emission intensity measured from Carmen Alto (23.16 degrees S, 70.66 degrees W), in Chile, showed a prompt increase of around 50%. Our results show that this prompt enhancement in the thermospheric dayglow seems to be caused mainly due to an increase in photoelectrons due to a sudden increase in the solar EUV flux associated with this flare.

引用

页数：6

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