Updated Reference Wavelengths for Si vii and Mg vii Lines in the 272–281 Å Range

IF 4.8 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Pub Date : 2023-11-01 DOI:10.3847/1538-4357/ad0548
Peter R. Young
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Abstract

Abstract New reference wavelengths for atomic transitions of Mg vii and Si vii in the 272–281 Å wavelength range are derived using measurements from the Extreme-ultraviolet Imaging Spectrometer (EIS) on board the Hinode spacecraft. Mg vii and Si vii are important ions for measuring plasma properties in the solar transition region at around 0.6 MK. The six Si vii wavelengths are 13–21 mÅ and 7–11 mÅ longer than the values in the NIST Atomic Spectra Database (ASD) and the compilations of B. Edlén, respectively. The four Mg vii wavelengths are shorter than the values in the ASD by 8–12 mÅ but show reasonable agreement with the Edlén values. The new wavelengths will lead to more accurate Doppler shift measurements from the EIS instrument and will be valuable for spectral disambiguation modeling for the upcoming Multi-Slit Solar Explorer mission.
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更新参考波长的Si vii和Mg vii线在272-281 Å范围
摘要:利用日之号航天器上的极紫外成像光谱仪(EIS)的测量结果,导出了在272-281 Å波长范围内Mg vii和Si vii原子跃迁的新参考波长。Mg vii和Si vii是测量0.6 MK左右太阳跃迁区等离子体特性的重要离子。Si vii的6个波长分别比NIST原子光谱数据库(ASD)和B. edl汇编中的值长13-21 mÅ和7-11 mÅ。4个mgvii波长比ASD中的值短8-12 mÅ,但与edl的值一致。新的波长将导致EIS仪器更精确的多普勒频移测量,并将对即将到来的多缝太阳探测器任务的光谱消歧建模有价值。
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来源期刊
Astrophysical Journal
Astrophysical Journal 地学天文-天文与天体物理
CiteScore
8.40
自引率
30.60%
发文量
2854
审稿时长
1 months
期刊介绍: The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
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