Surface photometry of low surface brightness galaxies

Blok, de Erwin; Hulst, van der Thijs; Bothun, G.

doi:10.1093/mnras/274.1.235

Cited by 173 publications

(277 citation statements)

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“…It has an optical low surface brightness counterpart, with some central faint HII regions from which Salzer et al (1991) Hulst (1998) found no very metal-poor LSBGs in their investigation, but three galaxies examined for abundance gradients were found to have none. This together with small or non existent colour gradients , de Blok et al 1995, Patterson and Thuan 1996 suggests that the stellar populations are spatially homogeneous in age and metallicity. This is supported also by recent near infrared surface photometry .…”

Section: Chemical Abundances Of Lsbgsmentioning

confidence: 97%

The most metal-poor galaxies

Kunth

Östlin

2000

Astronomy and Astrophysics Review

376

428

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Metallicity is a key parameter that controls many aspects in the formation and evolution of stars and galaxies. In this review we focus on the metal deficient galaxies, in particular the most metal-poor ones, because they play a crucial rôle in the cosmic scenery. We first set the stage by discussing the difficult problem of defining a global metallicity and how this quantity can be measured for a given galaxy. The mechanisms that control the metallicity in a galaxy are reviewed in detail and involve many aspects of modern astrophysics: galaxy formation and evolution, massive star formation, stellar winds, chemical yields, outflows and inflows etc. Because metallicity roughly scales as the galactic mass, it is among the dwarfs that the most metalpoor galaxies are found. The core of our paper reviews the considerable progress made in our understanding of the properties and the physical processes that are at work in these objects. The question on how they are related and may evolve from one class of objects to another is discussed. While discussing metal-poor galaxies in general, we present a more detailed discussion of a few very metal-poor blue compact dwarf galaxies like IZw18. Although most of what is known relates to our local universe, we show that it pertains to our quest for primeval galaxies and is connected to the question of the origin of structure in the universe. We discuss what QSO absorption lines and known distant galaxies tell us already? We illustrate the importance of star-forming metal-poor galaxies for the determination of the primordial helium abundance, their use as distance indicator and discuss the possibility to detect nearly metal-free galaxies at high redshift from Lyα emission.

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Section: Chemical Abundances Of Lsbgsmentioning

confidence: 97%

The most metal-poor galaxies

Kunth

Östlin

2000

Astronomy and Astrophysics Review

376

428

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“…Ha imaging (McGaugh 162 de Blok 1992) shows that a few regions of star formation are usually present in LSB galaxies. The low surface brightness of the underlying disc ensures that only a small amount of star formation is needed to significantly influence the colours (de Blok et al 1995). Measurements of the oxygen abundances in Hn regions in LSB galaxies (McGaugh 1994, de Blok & van der Hulst 1998 show that the metallicity is on average 0.2-0.5 solar.…”

Section: Properties Of "Normal" Lsb Galaxiesmentioning

confidence: 99%

“…LSB galaxy F563-1 is a late-type LSB galaxy, representative of the field LSB galaxies. The optical properties of this galaxy are described in de Blok et al (1995); measurements of metallicities in H n regions are described in de Blok & van der Hulst (1998a); a neutral hydrogen map and rotation curve are given in de . Parameters such as stellar velocity dispersion, which cannot be measured directly, are set in comparison with values measured locally in the Galaxy.…”

Section: N-body Simulationsmentioning

confidence: 99%

The Interstellar Medium in LSB Galaxies

Blok¹

1999

International Astronomical Union Colloquium

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“…A comparison with the colors of globular clusters (( U-B) «0.1, ( B-V) RSO.65, ( V-I) «0.95 (Reed 1985)), however, shows that these very blue LSB galaxies are actually bluer than very metal poor globular clusters. Thus, although low metallicity may play a role in the color of very blue LSB galaxies, it can only account for part of the reason (see McGaugh & Bothun 1994;de Blok, van der Hulst, & Bothun 1995). For these and many other reasons (i.e.…”

Section: The Very Bluementioning

confidence: 99%

“…For these and many other reasons (i.e. O'Neil, Bothun, & Schombert 1998;de Blok, van der Hulst, & Bothun 1995;, the simplest surviving theory to explain the very blue LSB galaxies is that the galaxies have a young mean age.…”

Section: The Very Bluementioning

confidence: 99%

The Discovery of Red Low Surface Brightness Galaxies

O'Neil¹

1999

International Astronomical Union Colloquium

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Abstract. We have performed a digital survey for Low Surface Brightness (LSB) galaxies in the spiral-rich Cancer and Pegasus clusters as well as the low density regime defined by the Great Wall. A total of 127 galaxies were found with /xs(0) > 22.0 mag arcsec -2 , 119 of which were previously unidentified.Consistent with other surveys, we find a significant number of galaxies with /is(0) > 23.0 mag arcsec -2 which suggests that the space density of galaxies as a function of /^s(O) is not strongly peaked. To more rigorously test this hypothesis we compare the actual surface brightness distribution from our survey with that from two different types of Monte-Carlo based sky images and show that it is not possible to distinguish between the flat distribution and the Gaussian one as the proper description of the underlying surface brightness distribution for this survey beyond 24.0 mag arcsec -2 .The colors of the survey galaxies range continuously from very blue to the first discovery of very red LSB galaxies. It also includes a group of old galaxies which show evidence for recent star formation. This continuous range of colors clearly shows that LSB galaxies at the present epoch define a wide range of evolutionary states.

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Surface photometry of low surface brightness galaxies

Cited by 173 publications

References 0 publications

The most metal-poor galaxies

The most metal-poor galaxies

The Interstellar Medium in LSB Galaxies

The Discovery of Red Low Surface Brightness Galaxies

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