Wedpm_WilsonC_COandCNinGalaxies

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Thanks to ALMA, a wide variety of new molecular species are no w accessible in nearby galaxies. Among these molecules, CN is particularly interesting as it relates to the dense gas tracer HCN via photodissociation and should trace the outer UV-heated layers of giant molecular clouds. In addition, the CN J=1-0 line can be measured simultaneously w ith the 12CO J=1-0 line at no extra cost in observing time. I will present the results of an archi val ALMA project investigating the variation of the CN/CO ratio in a sample of 10 nearby galaxies and its correlation with properties such as gas mass fraction, infrared luminosity, and merger p hase.

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