2006MNRAS.366.1475A

Query : 2006MNRAS.366.1475A

2006MNRAS.366.1475A - Mon. Not. R. Astron. Soc., 366, 1475-1492 (2006/March-2)

Morphology and star formation in nearby low surface brightness galaxies.

AULD R., DE BLOK W.J.G., BELL E. and DAVIES J.I.

Abstract (from CDS):

We present observations (B, R, K, Hα and Hi) of six nearby low surface brightness galaxies (LSBGs). They show an astonishing amount of variety; while some systems appear smooth and featureless, others resolve into loose assemblies of gas clouds. We have derived rotation curves, gas surface density profiles and star formation thresholds for three of the galaxies.

The results have been used to test two ideas describing their star formation: one in which star formation depends solely on the HI gas surface density, and one that depends on differential rotation. We find that a critical HI surface density criterion in the range 2.6-12.6x1020/cm2 (2.1-10.1M☉/pc2) best describes the star-forming ability of these galaxies on local and global scales. A critical gas surface density based on the rotation of the gas is also able to describe the results on a global scale for two of the three galaxies for which we were able to derive rotation curves.


Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): galaxies: evolution - galaxies: ISM - galaxies: kinematics and dynamics - galaxies: structure

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ICRF J001052.5-415310 AGN 00 10 52.51756175 -41 53 10.7788843   22.0       ~ 71 1
2 ESO 28-14 LSB 00 19 58.46 -77 05 26.9   15.90   14.90   ~ 13 0
3 ICRF J025246.1-710435 AGN 02 52 46.15578 -71 04 35.2742   19.0 19.0     ~ 96 1
4 NAME Schuster's Spiral GiP 03 58 56.3 -45 51 33   16.32   15.88   ~ 36 0
5 NAME Horologium Dwarf LSB 03 59 15.6 -45 52 21   15.19   15.05   ~ 39 0
6 QSO B0407-65 QSO 04 08 20.37884 -65 45 09.0806     18.0     ~ 173 1
7 ICRF J082526.8-501038 QSO 08 25 26.8673494560 -50 10 38.484054768   20.94       ~ 133 1
8 2MASX J12365934+1419494 LSB 12 36 59.3463193464 +14 19 49.164305988   17.80       ~ 202 0
9 ESO 104-22 LSB 18 55 41.2 -64 48 39   15.62   14.67 13.1 ~ 33 0
10 NGC 6744 GiG 19 09 46.1335950504 -63 51 26.897079024   9.28 8.25 8.08 9.6 ~ 275 0
11 ESO 104-44 LSB 19 11 22.5 -64 13 21   15.01   13.88   ~ 33 0
12 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1224 1
13 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
14 ESO 187-51 LSB 21 07 33.10 -54 57 02.0   14.90   13.87 14.4 ~ 44 0
15 ESO 145-25 LSB 21 54 05.11 -57 36 44.9   14.05   13.12 14.5 ~ 37 0

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