标题： 钱德拉X射线天文台对NGC 4258星系间介质中金属丰度的观测 显示英文标题

标题： Suzaku Observation of the Metallicity in the Interstellar Medium of NGC 4258

摘要： 慧星X射线卫星对附近螺旋星系NGC 4258进行了总有效曝光时间为100 ks的观测。 我们展示了慧星X射线光谱仪（XIS）数据的分析，在该分析中我们确认星际介质（ISM）的0.5至2 keV能谱可以用一个双温模型很好地表示。 冷和热的 ISM温度分别为0.23±0.02 keV和0.59±0.01 keV。 慧星的出色光谱灵敏度使我们能够首次测量ISM中的氧、氖、镁、硅和铁的金属丰度。 由此得到的氧、镁、硅和铁的丰度模式与Lodders（2003）的新太阳丰度表一致，而不是与Anders & Grevesse（1989）的一致。 这表明NGC 4258和银河系的金属富集过程相似。 显示英文摘要

摘要： The Suzaku X-ray satellite observed the nearby spiral galaxy NGC 4258 for a total good exposure time of 100 ks. We present an analysis of the Suzaku XIS data, in which we confirm that the 0.5--2 keV spectra of the interstellar medium (ISM) are well-represented by a two-temperature model. The cool and hot ISM temperatures are 0.23+-0.02 and 0.59 +-0.01 keV, respectively. Suzaku's excellent spectral sensitivity enables us to measure the metal abundances of O, Ne, Mg, Si and Fe of the ISM for the first time. The resultant abundance pattern of O, Mg, Si, and Fe is consistent with that of the new solar abundance table of Lodders (2003), rather than Anders & Grevesse (1989). This suggests that the metal enrichment processes of NGC 4258 and of our Galaxy are similar.