Nitrogen abundance in the X-ray halos of clusters and groups of galaxies

doi:10.1051/0004-6361/201730931

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	Nitrogen abundance in the X-ray halos of clusters and groups of galaxies
	Mao, Junjie 2,3; de Plaa, Jelle 2; Kaastra, Jelle S.2,3; Pinto, Ciro 4; Gu, Liyi 2; Mernier, Francois 2,3; Yan, Hong-Liang 1; Zhang, Yu-Ying 5; Akamatsu, Hiroki 2
刊名	ASTRONOMY & ASTROPHYSICS
	2018-12-19
卷号	621 页码:15
关键词	galaxies: clusters: intracluster medium X-rays: galaxies: clusters X-rays: galaxies techniques: spectroscopic
ISSN号	1432-0746
DOI	10.1051/0004-6361/201730931
英文摘要	Context. Chemical abundances in the X-ray halos (also known as the intracluster medium, ICM) of clusters and groups of galaxies can be measured via prominent emission line features in their X-ray spectra. Elemental abundances are footprints of time-integrated yields of various stellar populations that have left their specific abundance patterns prior to and during the cluster and group evolution. Aim. We aim to constrain nitrogen abundances in the CHEmical Evolution RGS Sample (CHEERS), which contains 44 nearby groups and clusters of galaxies, to gain a better understanding of their chemical enrichment. Method. We examined the high-resolution spectra of the CHEERS sample and took various systematic effects in the spectral modelling into account. We compared the observed abundance ratios with those in the Galactic stellar populations and also with predictions from stellar yields (low- and intermediate-mass stars, massive stars, and degenerate stars). Results. The nitrogen abundance can only be well constrained (greater than or similar to 3 sigma) in one cluster of galaxies and seven groups of galaxies. The [O/Fe] - [Fe/H] relation of the ICM is comparable to that for the Galaxy, while the [N/Fe] and [N/O] ratios of the ICM are both higher than in the Galaxy. Future studies on nitrogen radial distributions are required to tell whether the obtained higher [N/Fe] and [N/O] ratios are biased as a result of the small extraction region (r/r(500) less than or similar to 0.05) that we adopt here. Since abundances of odd-Z elements are more sensitive to the initial metallicity of stellar populations, accurate abundance measurements of N, Na, and Al are required to better constrain the chemical enrichment in the X-ray halos of clusters and groups of galaxies.
资助项目	USA (NASA) ; NWO, the Netherlands Organization for Scientific Research ; ERC[340442] ; German BMWi through the Verbundforschung[50OR1506] ; NWO
WOS关键词	REFLECTION GRATING SPECTROMETER ; GALACTIC CHEMICAL EVOLUTION ; XMM-NEWTON OBSERVATIONS ; EXTREMELY METAL-POOR ; INTRACLUSTER MEDIUM ; IA SUPERNOVAE ; ELEMENTAL ABUNDANCES ; CENTAURUS CLUSTER ; ELLIPTIC GALAXIES ; PERSEUS CLUSTER
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000454397000006
资助机构	USA (NASA) ; USA (NASA) ; NWO, the Netherlands Organization for Scientific Research ; NWO, the Netherlands Organization for Scientific Research ; ERC ; ERC ; German BMWi through the Verbundforschung ; German BMWi through the Verbundforschung ; NWO ; NWO ; USA (NASA) ; USA (NASA) ; NWO, the Netherlands Organization for Scientific Research ; NWO, the Netherlands Organization for Scientific Research ; ERC ; ERC ; German BMWi through the Verbundforschung ; German BMWi through the Verbundforschung ; NWO ; NWO ; USA (NASA) ; USA (NASA) ; NWO, the Netherlands Organization for Scientific Research ; NWO, the Netherlands Organization for Scientific Research ; ERC ; ERC ; German BMWi through the Verbundforschung ; German BMWi through the Verbundforschung ; NWO ; NWO ; USA (NASA) ; USA (NASA) ; NWO, the Netherlands Organization for Scientific Research ; NWO, the Netherlands Organization for Scientific Research ; ERC ; ERC ; German BMWi through the Verbundforschung ; German BMWi through the Verbundforschung ; NWO ; NWO
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24318]
专题	中国科学院国家天文台
通讯作者	Mao, Junjie
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China 2.SRON Netherlands Inst Space Res, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands 3.Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2300 RA Leiden, Netherlands 4.Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 5.Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany
推荐引用方式 GB/T 7714	Mao, Junjie,de Plaa, Jelle,Kaastra, Jelle S.,et al. Nitrogen abundance in the X-ray halos of clusters and groups of galaxies[J]. ASTRONOMY & ASTROPHYSICS,2018,621:15.
APA	Mao, Junjie.,de Plaa, Jelle.,Kaastra, Jelle S..,Pinto, Ciro.,Gu, Liyi.,...&Akamatsu, Hiroki.(2018).Nitrogen abundance in the X-ray halos of clusters and groups of galaxies.ASTRONOMY & ASTROPHYSICS,621,15.
MLA	Mao, Junjie,et al."Nitrogen abundance in the X-ray halos of clusters and groups of galaxies".ASTRONOMY & ASTROPHYSICS 621(2018):15.