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CO Observations of Luminous IR Galaxies at Intermediate Redshift

Y. Tutui·Y. Sofue·M. Honma·T. Ichikawa·K. Wakamatsu
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Abstract

We present new measurement of $^{12}$CO($J=1-0$) emission from 16 luminous infrared galaxies (LIGs) at intermediate redshift ($cz \sim 10,000 - 50,000 {\rm km s^{-1}}$). These new data were selected by isolated and normal morphology. The CO observations were performed using the NRO 45-m telescope. Comparison of the CO and dust properties of the new result with those from other CO measurements revealed characteristics of this sample: (1) It is the deepest CO observations of IRAS galaxies at intermediate redshift without strong interaction features. (2) It has typical properties of normal IRAS galaxies in terms of star-formation efficiency, color-color diagrams and galactic nuclear activity. (3) It has smaller gas-to-dust ratio than normal IRAS galaxies. This can be explained by two-component dust model, and our sample consists of most of warm dust.

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Y. Tutui, Y. Sofue, M. Honma, T. Ichikawa, K. Wakamatsu. 2000-07-01. CO Observations of Luminous IR Galaxies at Intermediate Redshift. https://doi.org/10.1093/pasj%2F52.5.803

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