SIMBAD references

2017AJ....154..116C - Astron. J., 154, 116-116 (2017/September-0)

Molecular gas and star-formation in low surface brightness galaxies.

CAO T.-W., WU H., DU W., LEI F.-J., ZHU M., WOUTERLOOT J., PARSONS H., ZHU Y.-N., WU C.-J., YANG F., CAO C., ZHOU Z.-M., HE M., JIN J.-J. and WICKER J.E.

Abstract (from CDS):

We have obtained CO(J = 2-1) spectra of nine face-on low surface brightness galaxies using the JCMT 15 m telescope and observed Hα images using the 2.16 m telescope of NAOC. As no CO has been detected, only upper limits on the H2 masses are given. The upper limits of total molecular hydrogen masses are about (1.2–82.4)×107 M☉. Their star-formation rates are mainly lower than 0.4 M☉ yr–1 and star-formation efficiencies are lower than 1.364×10–10  yr–1. Our results show that the absence of molecular gas content is the direct reason for the low star-formation rate. The low star-formation efficiency probably resulted from the low efficiency of H i gas transforming to H2 gas.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: star formation - ISM: molecules - ISM: molecules

Simbad objects: 10

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