The Structure of the Multi-Phase ISM in Low Surface Brightness Galaxies

AbstractThe multi-phase structure of the interstellar medium in low surface brightness galaxies is investigated and compared to observations. It is found that the ambient pressure and metallicity very strongly influence the abundances of molecular hydrogen and carbon monoxide. The emissivity of the latter is computed and found to agree naturally with the upper limits measured for low surface brightness galaxies. The implications for star formation efficiency and galaxy evolution are discussed.

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Searching for Low Surface Brightness Galaxies in the Hubble Ultra Deep Field: Implications for the Star Formation Efficiency in Neutral Gas at \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $z\sim 3$ \end{document}

The Astrophysical Journal ◽

10.1086/507574 ◽

2006 ◽

Vol 652 (2) ◽

pp. 981-993 ◽

Cited By ~ 88

Author(s):

Arthur M. Wolfe ◽

Hsiao‐Wen Chen

Keyword(s):

Star Formation ◽

Surface Brightness ◽

Neutral Gas ◽

Low Surface Brightness ◽

Hubble Ultra Deep Field ◽

Low Surface Brightness Galaxies ◽

Formation Efficiency

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The Tully-Fisher relation for low surface brightness galaxies: implications for galaxy evolution

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/273.1.l35 ◽

1995 ◽

Vol 273 (1) ◽

pp. L35-L38 ◽

Cited By ~ 134

Author(s):

M. A. Zwaan ◽

J. M. van der Hulst ◽

W. J. G. de Blok ◽

S. S. McGaugh

Keyword(s):

Galaxy Evolution ◽

Surface Brightness ◽

Low Surface Brightness ◽

Fisher Relation ◽

Low Surface Brightness Galaxies

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12CO(J=3→2) detections in bulges of low surface brightness galaxies with APEX

Proceedings of the International Astronomical Union ◽

10.1017/s1743921308017626 ◽

2007 ◽

Vol 3 (S245) ◽

pp. 191-192

Author(s):

Gaspar Galaz ◽

Paulo Cortes ◽

Leonardo Bronfman ◽

Monica Rubio

Keyword(s):

Surface Brightness ◽

High Surface ◽

Rotational Transition ◽

Main Beam ◽

Molecular Gas ◽

Gas Temperature ◽

Upper Limits ◽

Low Surface Brightness ◽

Low Surface Brightness Galaxies ◽

First Time

AbstractUsing the APEX sub-millimeter telescope we have detected for the first time the CO rotational transition 12CO(J=3→2) in two of five low surface brightness galaxies. For galaxies with positive detection, the emission is detected in their bulges, with measured gas velocity dispersion of about 80 km/s and observed main-beam brightness temperature TM B ~ 10 mK. Using a standard CO to H2 conversion factor, we are able to estimate molecular gas masses for LSBs with positive detections, and upper limits for those LSBs with negative detections. Assuming a higher gas temperature for the generation of the 12CO(J=3→2) line compared to that for the 12CO(J=1→0) one, results suggest that a warm molecular gas component is present in bulges, indicating a radiation field preventing the formation of large cooler amounts of molecular gas, compared to high surface brightness galaxies with higher metallicity and likely more dust.

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Linking Clustering Properties and the Evolution of Low Surface Brightness Galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921307014081 ◽

2007 ◽

Vol 3 (S244) ◽

pp. 274-278

Author(s):

Dominik J. Bomans ◽

S. Dominik Rosenbaum

Keyword(s):

Galaxy Evolution ◽

Surface Brightness ◽

Large Scale ◽

High Surface ◽

Sloan Digital Sky Survey ◽

Dark Matter Halo ◽

Sky Survey ◽

Low Surface Brightness ◽

Low Surface Brightness Galaxies ◽

Lsb Galaxies

AbstractThe reasons for the presence of two branches of galaxy evolution, one producing high surface brightness disks and one creating low surface brightness disks, is still unknown. Possible are the imprint of the properties of the dark matter halo, as well as evolutionary effects. In this paper we present an analysis of the clustering properties of LSB and HSB galaxies using the Sloan Digital Sky Survey. We show that LSB galaxies reside in regions of lower galaxy density than HSB galaxies on all scales between 0.8 and 8 Mpc, from scales of galaxy pairs to filaments of the Large Scale Structure. This implies a probable scenario of LSB galaxies preferentially forming as a result of local peaks in the large-scale valleys of the primordial density distribution.

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