2017AJ....154..116C

Query : 2017AJ....154..116C

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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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LEDA 1831240 AG? 00 02 55.556 +28 16 43.54           ~ 10 0
2 LEDA 169950 AG? 00 05 05.0675020536 +23 58 14.268944028           ~ 15 0
3 SDSS J001612.22+245059.0 G 00 16 12.224 +24 50 59.06           ~ 8 0
4 LEDA 138333 AG? 01 14 45.617 +27 08 10.11   15.5       ~ 20 0
5 LEDA 4565743 AG? 08 01 13.025 +11 37 24.72           ~ 8 0
6 MCG+03-22-022 AG? 08 40 58.608 +16 11 00.12   16.0       ~ 15 0
7 MCG+05-53-019 AG? 22 50 30.2654507664 +29 08 19.524600636   16.0       ~ 42 0
8 SN 2002en SN* 22 59 40.82 +24 04 17.5     18.3     SNII 11 1
9 MCG+04-54-013 LSB 22 59 41.5252876176 +24 04 29.740082844   16.0       ~ 34 0
10 NGC 7589 Sy1 23 18 15.6790109856 +00 15 40.267016028   15.01 17.01     ~ 99 3

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