Bright near-infrared sources within 1 deg of the Galactic center. I - Survey and 1-20 micron photometry
Bright near-infrared sources within 1 deg of the Galactic center. I - Survey and 1-20 micron photometry
复制标题
距银河中心 1 度以内的明亮近红外源。
DOI：
10.1086/172462
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
K. Kawara
中科院分区：
文献类型：
--
作者：
T. Nagata;A. R. Hyland;S. Straw;S. Sato;K. Kawara
报告了对银河系中心0.55平方度的近红外测量结果。对这次巡天中发现的50个天体进行了额外的红外测光，以研究银河系中心区域发光恒星的性质，包括K小于7.6和H-K不小于1.4的所有光源。除了正常的M型恒星和长周期变星的候选者外，还在（l，B）=（0.15，0.0 deg）附近的一个小区域内探测到了四个能谱峰值约为5微米的天体，该区域靠近6厘米射电弧与银河平面的交叉点。这四个可能是银河系中心附近的年轻恒星。这表明，在硅酸盐吸收的相对深度变化是本地化的银河系中心周围的一个相当小的区域。
Results of a near-IR survey of 0.55 sq deg toward the Galactic center are reported. Additional IR photometry of 50 objects found in this survey was made in order to investigate the nature of luminous stars in the central region of the Milky Way including all sources with K less than 7.6 and H-K not less than 1.4. In addition to candidates for normal M-type stars and long-period variables, four objects whose energy spectra peak at about 5 microns have been detected in a small region around (l, b) = (0.15, 0.0 deg), near the crossing of the 6-cm radio arc with the Galactic plane. These four might be young stellar objects near the Galactic center. It is suggested that the relative depth change in the silicate absorption is localized to a fairly small region around the Galactic center.