标题： 银河系恒星棒状结构退行尖端的一个主要恒星形成区域。 II. 补充信息和证据表明，该棒状结构与先前报道的三轴核球并非同一结构 显示英文标题

标题： A major star formation region in the receding tip of the stellar Galactic bar. II. Supplementary information and evidence that the bar is not the same structure as the triaxial bulge previouly reported

摘要： 本文是Garzon等人(1997: ApJ 491, L31)的第二部分，在此我们介绍了对Two Micron Galactic Survey(TMGS)项目后续程序中60个光谱分析的概述，该区域位于l=27度，b=0度。 在第二部分中，我们提供了更详细的分析说明以及每个60颗恒星的光谱库，以提供更完整的信息，并进一步讨论了对银河系结构的意义。 该区域在通量分布和恒星计数中存在明显的过量，此前在多个光谱范围内已被观察到，特别是在TMGS中。 超过50%的在非常高的置信水平下检测到的m_K<5.0星等的恒星光谱对应于光度等级I的恒星，其余部分中有很大一部分是非常晚型的巨星，这些恒星也必须迅速演化。 我们利用所有可用的证据，认为我们正在观察的是银河系棒的近端区域，其中Scutum旋臂分离，这为棒的存在提供了有力的证据。 其他解释无法像这样令人满意地说明观测结果。 棒的一端及更不用说两端的空间定位使我们能够推断出棒相对于太阳-银河系中心线的方位角约为75度。 这个角度与其他作者给出的棒的角度不同，我们认为这是因为他们指的是三轴核球，而不是此处检测到的棒。 显示英文摘要

摘要： This paper is the second part of Garzon et al. (1997: ApJ 491, L31) in which we presented an outline of the analysis of 60 spectra from a follow-up program to the Two Micron Galactic Survey (TMGS) project in the l=27 deg., b=0 deg. area. In this second part, we present a more detailed explanation of the analysis as well a library of the spectra for more complete information for each of the 60 stars, and further discussions on the implications for the structure of the Galaxy. This region contains a prominent excess in the flux distribution and star counts previously observed in several spectral ranges, notably in the TMGS. More than 50% of the spectra of the stars detected with m_K<5.0 mag, within a very high confidence level, correspond to stars of luminosity class I, and a significant proportion of the remainder are very late giants which must also be rapidly evolving. We make the case, using all the available evidence, that we are observing a region at the nearer end of the Galactic bar, where the Scutum spiral arm breaks away, and that this is powerful evidence for the presence of the bar. Alternative explanations do not give nearly such a satisfactory account of the observations. The space localization of one and, a fortiori, of both ends of the bar allows us to infer a position angle for the bar of around 75 deg. with respect to the Sun-Galactic centre line. The angle is different from that given by other authors for the bar and this, we think, is because they refer to the triaxial bulge and not to the bar as detected here.