The LMT Galaxies' 3 mm Spectroscopic Survey: First Results
Abstract
The molecular phase of the interstellar medium (ISM) in galaxies offers fundamental insight for understanding star-formation processes and how stellar feedback affects the nuclear activity of certain galaxies. We present here Large Millimeter Telescope spectra obtained with the Redshift Search Receiver, a spectrograph that cover simultaneously the 3 mm band from 74 to 111 GHz with a spectral resolution of around 100 km/s. The observed galaxies that have been detected previously in HCN, have different degrees of nuclear activity, one normal galaxy (NGC 6946), the starburst prototype (M 82) and two ultraluminous infrared galaxies (ULIRGs, IRAS 17208-0014 and Mrk 231). We plotted our data in the HCO+/HCN vs. HCN/13CO diagnostic diagram finding that NGC 6946 and M 82 are located close to other normal galaxies; and that both IRAS 17208-0014 and Mrk 231 are close to the position of the well known ULIRG Arp 220 reported by Snell et al. (2011). We found that in Mrk 231 -- a galaxy with a well known active galactic nucleus -- the HCO+/HCN ratio is similar to the ratio observed in other normal galaxies.
Keywords
Cite
@article{arxiv.1402.4810,
title = {The LMT Galaxies' 3 mm Spectroscopic Survey: First Results},
author = {D. Rosa Gonzalez and P. Schloerb and O. Vega and L. Hunt and G. Narayanan and D. Calzetti and M. Yun and E. Terlevich and R. J. Terlevich and Y. D. Mayya and M. Chavez and A. Montana and A. M. Perez Garcia},
journal= {arXiv preprint arXiv:1402.4810},
year = {2014}
}
Comments
Proceedings to appear in "Massive Young Star Clusters Near and Far: From the Milky Way to Reionization", 2013 Guillermo Haro Conference. Eds. Y. D. Mayya, D. Rosa-Gonzalez, & E. Terlevich, INAOE and AMC. 5 pages, 1 figure