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首页> 外文期刊>The Astrophysical journal >MOLECULAR GAS IN THE z = 1.2 ULTRALUMINOUS MERGER GOODS J123634.53+621241.3
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MOLECULAR GAS IN THE z = 1.2 ULTRALUMINOUS MERGER GOODS J123634.53+621241.3

机译：z = 1.2中的分子合并气体J123634.53 + 621241.3

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摘要

We report the detection of CO(2→1) emission from the z = 1.2 ultraluminous infrared galaxy (ULIRG) GOODS J123634.53+621241.3 (also known as the submillimeter galaxy GN 26). These observations represent the first discovery of high-redshift CO emission using the new Combined Array for Research in Millimeter-Wave Astronomy (CARMA). Of all high-redshift (z> 1) galaxies within the GOODS-North field, this source has the largest far-infrared (FIR) flux observed in the Spitzer 70 and 160 μm bands. The CO redshift confirms the optical identification of the source, and the bright CO(2→1) line suggests the presence of a large molecular gas reservoir of about 7 × 10~(10) M_☉. The infrared-to-CO luminosity ratio of L(IR)/L'(CO) = 80 ± 30 L_☉ (K km s~(-1) pc~2)~(-1) is slightly smaller than the average ratio found in local ULIRGs and high-redshift submillimeter galaxies. The short star formation timescale of about 70 Myr is consistent with a starburst associated with the merger event and is much shorter than the timescales for spiral galaxies and estimates made for high-redshift galaxies selected on the basis of their B - z and z - K colors.
机译：我们报告了从z = 1.2超发光红外星系（ULIRG）GOODS J123634.53 + 621241.3（也称为亚毫米星系GN 26）检测到CO（2→1）发射的情况。这些观测结果代表了使用新型毫米波天文学联合阵列（CARMA）首次发现高红移CO的发现。在GOODS-North场内的所有高红移（z> 1）星系中，该源在Spitzer 70和160μm波段中观察到的最大远红外（FIR）通量。 CO的红移证实了源的光学识别，明亮的CO（2→1）线表明存在大约7×10〜（10）M_☉的大分子气藏。 L（IR）/ L'（CO）的红外/ CO光度比= 80±30L_☉（K km s〜（-1）pc〜2）〜（-1）略小于平均值在当地的ULIRG和高红移亚毫米星系中发现。约70 Myr的短恒星形成时标与合并事件相关的星暴相符，并且比螺旋星系的时标和基于B-z和z-K选出的高红移星系的估计要短得多。颜色。

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