天文学进展2025，Vol.43Issue(4)：598-616,19.DOI:10.3969/j.issn.1000-8349.2025.04.05
侧向星系的氮与硫发射线比研究
The Study of Nitrogen and Sulfur Emission Line Ratios in Edge-on Galaxies
摘要
Abstract
Accretion and feedback constitute the material cycle between galaxies and their environment,and metal-licity is closely related to this cycling process.By utilizing a sample of 608 edge-on galaxies obtained from the MaNGA integral field survey,we examine the nitrogen and sulfur emission line ratios,as well as the distribution of metallicity.The study shows that the MaNGA edge-on galaxy sample and SDSS galaxies exhibit similar bimodal distributions on the N2S2 diagram,with the MaNGA edge-on galaxies slightly shifted towards the upper left.Ad-ditionally,the[N II]/[S II]ratio is generally higher at the centers of most galaxies compared to their outer regions,with four galaxies centers displaying a conical structure of nitrogen enrichment.Lastly,the spatial distribution of metallicity in edge-on galaxies measured by different methods is generally consistent,with only a few galaxies show-ing higher oxygen abundance in their outer regions compared to their centers,which may be related to the selection criteria for the R23"double branch"method and requires further optimization.关键词
物质循环/金属丰度/N2S2图Key words
material cycle/metallicity/N2S2 diagram分类
天文与地球科学引用本文复制引用
DOU Baolian,HAO Lei,YIN Jun,LIN Minyi..侧向星系的氮与硫发射线比研究[J].天文学进展,2025,43(4):598-616,19.基金项目
国家重点研发计划(2022YFF0503402) （2022YFF0503402）
国家自然科学基金(12233005) （12233005）
