NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T12:47:54 PDT
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For refcode 2015ApJS..218...28V:
Retrieve 138 NED objects in this reference.
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2015ApJS..218...28V The Arizona Radio Observatory Survey of Molecular Gas in Nearby Normal Spiral Galaxies I: The Data Vila-Vilaro, B.; Cepa, J.; Zabludoff, A. Abstract. Using the ARO KP 12 m telescope, we have carried out a CO(1--0) and ^13^CO(1--0) survey of the central regions of 113 "normal" spiral galaxies (i.e., unperturbed and with little or no nuclear activity). Our sample spans the whole range of morphological types (T = 1--7), with distances up to 75 Mpc. The detection rates for the observed objects are 99.1% for CO(1--0) and 75.2% for ^13^CO(1--0), respectively. For three of the targets in our sample (i.e., NGC 0891, NGC 2903, and NGC 3521), we also carry out ^13^CO(1--0) mapping along their major axes, which, combined with data from the literature, reveal differences in their molecular gas properties. Analysis of the beam-matched line intensity ratios of CO(1--0)/^13^CO(1--0) (hereafter {R}_13_^12^) indicates that for "normal" spiral galaxies the scatter in {R}_13_^12^ is of ~x3, and has an average value (including upper limits) of 10.4 +/- 0.4 (in contrast with the values of 3--5 in typical giant molecular clouds and 13 +/- 6 in Starburst Galaxies). No significant correlations (at the >=2sigma level) are found between {R}_13_^12^ and the total far-infrared (FIR) luminosity, the FIR colors, and the fraction of area sampled in the disk of each galaxy. There is a tentative (1.4sigma significance) correlation between {R}_13_^12^ and morphological type along the Hubble sequence. The observed scatter in {R}_13_^12^ can be explained by intrinsic variations among the CO conversion factors. The observations presented in this work, which include the most extensive ^13^CO(1--0) extragalactic survey published so far on "normal" spiral galaxies are ideally suited for use in recovering the "missing" flux of interferometers with elements of similar dish sizes. Key words: galaxies: ISM, galaxies: spiral, galaxies: statistics
Retrieve 138 NED objects in this reference.
Please click here for ADS abstract

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