New observations of the gas cloud associated with the quasar-galaxy pair 3C 232/NGC 3067

New observations of the gas cloud associated with the quasar-galaxy pair 3C 232/NGC 3067
复制标题

对与类星体星系对 3C 232/NGC 3067 相关的气体云的新观测

DOI:
--
复制
发表时间:
1991
期刊:
影响因子:
--
通讯作者:
T. Snow
T. Snow
中科院分区:
--
文献类型:
--
作者:
J. Stocke;J. Case;M. Donahue;J. Shull;T. Snow

文献摘要

被引文献

相似文献

提供了新的光学 Na I 和 Ca II 光谱、新的 Hα 图像以及类星体星系对 3C 232/NGC 3067 的存档 IUE 紫外光谱,以研究 NGC 3067 和 3C 232 东缘之间 21 cm 发射中看到的 H I 气体云。高分辨率光谱显示 Ca II 和 Na I 中有两个(可能是三个)吸收系统,具有较大的速度扩展; IUE 光谱显示 Fe II 和 Mg II 吸收。最强的系统与 cz = 1420 km/s 处的窄 21 cm 吸收一致,并且 Na I/Ca II 为 0.7-2,表明含 Ca 颗粒没有受到强烈干扰。 H I 吸收很可能是由冷气体产生的,其中包含 21 cm 发射中看到的 3 × 10 21 cm -2 暖 H I 的 1%-2%
New optical Na I and Ca II spectra, new Hα images, and archival IUE ultraviolet spectra of the quasar-galaxy pair 3C 232/NGC 3067 are presented to study the H I gas cloud seen in 21 cm emission between the eastern edge of NGC 3067 and 3C 232. High-resolution optical spectra show two, and possibly three, absorption systems in Ca II and Na I, with a large velocity spread ; IUE spectra show Fe II and Mg II absorption. The strongest system is coincident with narrow 21 cm absorption at cz = 1420 km/s and has Na I/Ca II 0.7-2, suggesting that the Ca-bearing grains have not been strongly disturbed. The H I absorption is most likely produced by cold gas comprising 1%-2% of the 3 × 10 21 cm -2 of warm H I seen in 21 cm emission