SIMBAD references

2018MNRAS.475..248C - Mon. Not. R. Astron. Soc., 475, 248-256 (2018/March-3)

VALES - IV. Exploring the transition of star formation efficiencies between normal and starburst galaxies using APEX/SEPIA Band-5 and ALMA at low redshift.

CHENG C., IBAR E., HUGHES T.M., VILLANUEVA V., LEITON R., ORELLANA G., MUNOZ ARANCIBIA A., LU N., XU C.K., WILLMER C.N.A., HUANG J., CAO T., YANG C., XUE Y.Q. and TORSTENSSON K.

Abstract (from CDS):

In this work, we present new the Swedish-ESO PI receiver for the Atacama Pathfinder Experiment APEX/SEPIA Band-5 observations targeting the CO (J = 2-1) emission line of 24 Herschel-detected galaxies at z = 0.1-0.2. Combining this sample with our recent new Valparaiso ALMA Line Emission Survey (VALES), we investigate the star formation efficiencies [SFEs = star formation rate (SFR)/M_ H2] of galaxies at low redshift. We find the SFE of our sample bridges the gap between normal star-forming galaxies and Ultra-Luminous Infrared Galaxies (ULIRGs), which are thought to be triggered by different star formation modes. Considering the SFE as the SFR and the L^′^_ CO_ ratio, our data show a continuous and smooth increment as a function of infrared luminosity (or star formation rate) with a scatter about 0.5 dex, instead of a steep jump with a bimodal behaviour. This result is due to the use of a sample with a much larger range of sSFR/sSFRms using LIRGs, with luminosities covering the range between normal and ULIRGs. We conclude that the main parameters controlling the scatter of the SFE in star-forming galaxies are the systematic uncertainty of the αCO conversion factor, the gas fraction, and physical size.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: ISM - galaxies: starburst - galaxies: star formation - submillimetre: galaxies

Simbad objects: 33

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2021.03.04-12:14:19

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