WAVELENGTH MEASUREMENTS OF K TRANSITIONS OF OXYGEN, NEON, AND MAGNESIUM WITH X-RAY ABSORPTION LINES

	WAVELENGTH MEASUREMENTS OF K TRANSITIONS OF OXYGEN, NEON, AND MAGNESIUM WITH X-RAY ABSORPTION LINES
	Liao, Jin-Yuan 1; Zhang, Shuang-Nan 1,2; Yao, Yangsen 3,4
刊名	ASTROPHYSICAL JOURNAL
	2013-09-10
卷号	774 期号:2
关键词	ISM: atoms methods: data analysis X-rays: binaries X-rays: ISM
英文摘要	Accurate atomic transition data are important in many astronomical research areas, especially for studies of line spectroscopy. Whereas transition data of He-like and H-like ions (i.e., ions in high-charge states) have been accurately calculated, the corresponding data of K transitions of neutral or low-ionized metal elements are still very uncertain. Spectroscopy of absorption lines produced in the interstellar medium (ISM) has been proven to be an effective way to measure the central wavelengths of these atomic transitions. In this work, we analyze 36 Chandra High Energy Transmission Grating observations to search for and measure the ISM absorption lines along sight lines to 11 low-mass X-ray binaries. We correct the Galactic rotation velocity to the rest frame for every observation and then use two different methods to merge all the corrected spectra to a co-added spectrum. However, the co-added spectra obtained by this method exhibit biases, toward to either observations with high counts or lines with high signal-to-noise ratios. We do a Bayesian analysis of several significantly detected lines to obtain the systematic uncertainty and the bias correction for other lines. Compared to previous studies, our results improve the wavelength accuracy by a factor of two to five and significantly reduce the systematic uncertainties and biases. Several weak transitions (e. g., 1s-2p of Mg IV and Mg V; 1s-3p of Mg III and Mg V) are also detected for the first time, albeit with low significance; future observations with improved accuracy are required to confirm these detections.
收录类别	SCI
语种	英语
WOS记录号	WOS:000323888900025
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5864]
专题	国家天文台_空间科学研究部
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Eureka Sci, Oakland, CA 94602 USA 4.Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
推荐引用方式 GB/T 7714	Liao, Jin-Yuan,Zhang, Shuang-Nan,Yao, Yangsen. WAVELENGTH MEASUREMENTS OF K TRANSITIONS OF OXYGEN, NEON, AND MAGNESIUM WITH X-RAY ABSORPTION LINES[J]. ASTROPHYSICAL JOURNAL,2013,774(2).
APA	Liao, Jin-Yuan,Zhang, Shuang-Nan,&Yao, Yangsen.(2013).WAVELENGTH MEASUREMENTS OF K TRANSITIONS OF OXYGEN, NEON, AND MAGNESIUM WITH X-RAY ABSORPTION LINES.ASTROPHYSICAL JOURNAL,774(2).
MLA	Liao, Jin-Yuan,et al."WAVELENGTH MEASUREMENTS OF K TRANSITIONS OF OXYGEN, NEON, AND MAGNESIUM WITH X-RAY ABSORPTION LINES".ASTROPHYSICAL JOURNAL 774.2(2013).