CO(J=3-2) observations of MS 1512-cB58 at z=2.72

被引：8
|
作者：
Nakanishi, K
Ohta, K
Takeuchi, TT
Akiyama, M
Yamada, T
Shioya, Y
机构：
[1] TOHOKU UNIV, INST ASTRON, AOBA KU, SENDAI, MIYAGI 98077, JAPAN
[2] TOHOKU UNIV, INTERDISCIPLINARY RES CTR, AOBA KU, SENDAI, MIYAGI 98077, JAPAN
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 1997年 / 49卷 / 05期
关键词：
CO emission line; galaxies; formation; individual; (MS; 1512-cB58);
D O I：
10.1093/pasj/49.5.535
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on a search for (CO)-C-12(J = 3-2) emission line toward MS 1512-cB58, a forming galaxy candidate at z = 2.72. We have observed the object with the 45-m telescope of the Nobeyama Radio Observatory, and found no significant emission. The 3 sigma upper limit of the CO (J = 3-2) line luminosity is 4.4 x 10(10) K km s(-1) pc(2), assuming a line velocity width of 300 km s(-1) this corresponds to a molecular hydrogen mass of 2.0 x 10(11)M(a), if we assume the Galactic CO-to-H-2 conversion factor. A lower limit on the ratio of the H alpha line luminosity to the CO luminosity of MS 1512-cB58 is at an upper part of, but within, the range of ratios for nearby galaxies.
引用
收藏
页码：535 / 538
页数：4
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