The Ne/O abundance ratio in the quiet Sun

被引：70

作者：

Young, PR ^{[1
]}

机构：

[1] Rutherford Appleton Lab, CCLRC, Didcot OX11 0QX, Oxon, England

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 444卷 / 02期

关键词：

Sun : abundances; Sun : photosphere; Sun : transition region; sun : UV radiation;

D O I：

10.1051/0004-6361:200500206

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. To determine the neon-to-oxygen abundance in the quiet Sun, a proxy for the photospheric abundance ratio. Methods. An emission measure method applied to extreme ultraviolet emission lines of Ne IV-VI and OIII-V ions observed by the Coronal Diagnostic Spectrometer on the SOHO satellite. Results. The average Ne Ne/O abundance ratio in supergranule cell centre regions is 0.18 +/- 0.05, while in supergranule network regions is 0.16 +/- 0.04. A photospheric Ne/O ratio of 0.17 +/- 0.05 is suggested, in good agreement with the most recent compilation of solar photospheric abundances, but discrepant with a recent Ne/O ratio derived from stellar X-ray spectra and revised neon abundances suggested from solar interior models.

引用

页码：L45 / L48

页数：4

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