scholarly journals The properties of a large sample of low surface brightness galaxies from SDSS

2009 ◽  
Vol 5 (S262) ◽  
pp. 213-216
Author(s):  
Y. C. Liang ◽  
G. H. Zhong ◽  
X. Y. Chen ◽  
D. Gao ◽  
F. Hammer ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Disk Galaxies ◽  
Large Sample ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Stellar Masses ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

AbstractA large sample of low surface brightness (LSB) disk galaxies is selected from SDSS with B-band central surface brightness μ0(B) from 22 to 24.5 mag arcsec−2. Some of their properties are studied, such as magnitudes, surface brightness, scalelengths, colors, metallicities, stellar populations, stellar masses and multiwavelength SEDs from UV to IR etc. These properties of LSB galaxies have been compared with those of the galaxies with higher surface brightnesses. Then we check the variations of these properties following surface brightness.

scholarly journals The spectral properties of a large sample of low surface brightness disk galaxies

2008 ◽  
Vol 4 (S252) ◽  
pp. 119-120
Author(s):  
Y. C. Liang ◽  
G. H. Zhong ◽  
L. C. Deng ◽  
B. Zhang
Keyword(s):  
Spectral Properties ◽  
Surface Brightness ◽  
Disk Galaxies ◽  
Large Sample ◽  
Star Forming ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Galaxy Sample ◽  
Stellar Masses ◽  
Lsb Galaxies

AbstractWe present the spectral properties of a large sample of nearly face-on low surface brightness (LSB) disk galaxies selected from the SDSS-DR4 main galaxy sample. About 12,282 LSB galaxies have been selected from the photometry database with their B-band central surface brightness μ0(B) ranging from 22 to 24.5 mag arcsec−2. About 7000 of such LSBGs have measured emission lines ([OII]3727, [OIII]5007, Hβ, Hα, [NII]6583) with the S/N ratio greater than 5σ. Their spectral diagnostic diagram of [NII]/Hα vs. [OIII]/Hβ shows that ~89% of them are star-forming galaxies, and ~11% could be classified as AGNs. The relations of μ0(B) vs. 12+log(O/H) and μ0(B) vs. stellar masses M* of these star-forming LSB galaxies show that their O/H and M* increase following the increasing μ0(B). The majority of these LSBGs are on the higher branch of metallicity.

scholarly journals A large sample of low surface brightness disk galaxies from SDSS

2008 ◽  
Vol 4 (S252) ◽  
pp. 131-132
Author(s):  
G. H. Zhong ◽  
Y. C. Liang ◽  
L. C. Deng ◽  
B. Zhang
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Disk Galaxies ◽  
Large Sample ◽  
Central Surface ◽  
Main Galaxy ◽  
Low Surface Brightness ◽  
Galaxy Sample

AbstractWe present the properties of a large sample (12,282) of nearly face-on low surface brightness disk galaxies selected from the main galaxy sample of SDSS-DR4. Those properties includes B-band central surface brightness μ0(B), scale lengths h, distances D, integrated magnitudes, colors and some resulted relations. This sample has μ0(B) from 22 to 24.5 mag arcsec−2 with a median value of 22.44 mag arcsec−2. They are quite bright with MB taking values from −18 to −23 mag with a median value of −20.08 mag. The disk scale lengths h are from 2 kpc to 19 kpc. There exist clear correlations between log h and MB, log h and log D. Both the optical-optical and optical-NIR color-color relations show most of them have a mix of young and old stellar populations.

scholarly journals The universal rotation curve of low surface brightness galaxies – IV. The interrelation between dark and luminous matter

2019 ◽  
Vol 490 (4) ◽  
pp. 5451-5477 ◽  
Author(s):  
Chiara Di Paolo ◽  
Paolo Salucci ◽  
Adnan Erkurt
Keyword(s):  
Dark Matter ◽  
Surface Brightness ◽  
Rotation Curve ◽  
High Surface ◽  
Dark Matter Halo ◽  
Rotation Curves ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

ABSTRACT We investigate the properties of the baryonic and the dark matter components in low surface brightness (LSB) disc galaxies, with central surface brightness in the B band $\mu _0 \ge 23 \, \mathrm{mag \, arcsec}^{-2}$. The sample is composed of 72 objects, whose rotation curves show an orderly trend reflecting the idea of a universal rotation curve (URC) similar to that found in the local high surface brightness (HSB) spirals in previous works. This curve relies on the mass modelling of the co-added rotation curves, involving the contribution from an exponential stellar disc and a Burkert cored dark matter halo. We find that the dark matter is dominant especially within the smallest and less luminous LSB galaxies. Dark matter haloes have a central surface density $\Sigma _0 \sim 100 \, \mathrm{M}_{\odot } \, \mathrm{pc}^{-2}$, similar to galaxies of different Hubble types and luminosities. We find various scaling relations among the LSBs structural properties which turn out to be similar but not identical to what has been found in HSB spirals. In addition, the investigation of these objects calls for the introduction of a new luminous parameter, the stellar compactness C* (analogously to a recent work by Karukes & Salucci), alongside the optical radius and the optical velocity in order to reproduce the URC. Furthermore, a mysterious entanglement between the properties of the luminous and the dark matter emerges.

scholarly journals The Central Dynamics of Blue Low Surface Brightness Galaxies

2004 ◽  
Vol 220 ◽  
pp. 335-336
Author(s):  
Erik Zackrisson ◽  
Nils Bergvall
Keyword(s):  
Dark Matter ◽  
Density Profile ◽  
Surface Brightness ◽  
Cold Dark Matter ◽  
Central Density ◽  
Disk Galaxies ◽  
Rotation Curves ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Low Surface Brightness Galaxies

We use optical, long-slit rotation curves to derive the slope of the central density profile in three blue disk galaxies with very faint central surface brightness values. We find the result to be in conflict with current cold dark matter predictions and to lend further support for pseudo-isothermal spheres as superior models for the dark halos of galaxies.

scholarly journals Star Formation in Massive Low Surface Brightness Galaxies

2007 ◽  
Vol 3 (S244) ◽  
pp. 266-273
Author(s):  
K. O'Neil
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Structural Parameters ◽  
Gas Content ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Depth Study ◽  
Galaxy Population ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

AbstractMassive low surface brightness galaxies have disk central surface brightnesses at least one magnitude fainter than the night sky, but total magnitudes and masses that show they are among the largest galaxies known. Like all low surface brightness (LSB) galaxies, massive LSB galaxies are often in the midst of star formation yet their stellar light has remained diffuse, raising the question of how star formation is proceeding within these galaxies. We have undertaken a multi-wavelength study to clarify the structural parameters and stellar and gas content of these enigmatic systems. The results of these studies, which include HI, CO, optical, near UV, and far UV images of the galaxies will provide the most in depth study done to date of how, when, and where star formation proceeds within this unique subset of the galaxy population.

scholarly journals Stellar Population Analysis on a Large Sample of Low Surface Brightness Galaxies

2012 ◽  
Vol 8 (S292) ◽  
pp. 154-154 ◽  
Author(s):  
Xiaoyan Chen ◽  
Ali Luo ◽  
Yanchun Liang
Keyword(s):  
Surface Brightness ◽  
Stellar Population ◽  
Population Analysis ◽  
Sloan Digital Sky Survey ◽  
Large Sample ◽  
Central Surface ◽  
Sky Survey ◽  
Low Surface Brightness ◽  
Galaxy Sample ◽  
Low Surface Brightness Galaxies

AbstractWe study the stellar populations of a large sample of nearly face-on disk Low Surface Brightness Galaxies (LSBGs), with B-band central surface brightness μ0(B) > 22 mag arcsec−2, selected from the Sloan Digital Sky Survey Data Release 4 (SDSS-DR4) main galaxy sample (similar to Zhong et al. 2008; Liang et al. 2010).

scholarly journals Low Surface Brightness Galaxies Around the Hubble Deep Field South

2007 ◽  
Vol 3 (S244) ◽  
pp. 354-355 ◽  
Author(s):  
L. Haberzettl ◽  
D. J. Bomans ◽  
R.-J. Dettmar
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Stellar Population ◽  
Stellar Populations ◽  
Low Surface Brightness ◽  
Galaxy Redshift ◽  
Low Surface Brightness Galaxies ◽  
Hubble Deep Field ◽  
Lsb Galaxies ◽  
Selection Of

AbstractWe present results from a study of the SFH of a sample of LSB galaxies around the HDF-S. For the selection of the LSB galaxy candidates we used color–color diagrams, from which we selected the candidates based on their different location in comparison to the HSB galaxy redshift tracks. We compared measured spectra to synthetic SEDs from synthesis evolution models. We were able to fit SEDs in the range of 2 to 5 Gyr to the spectra of the LSB galaxies, while applying the same method to a sample of HSB galaxies resulted in an averaged stellar population of about 10 to 14 Gyr. Therefore, LSB galaxies tend to show much younger averaged stellar populations. This implies that the major star formation event of LSB galaxies took place at a redshift of z ~ 0.2 to 0.4 while for HSB galaxies this tends to be at z ~ 2 to 4.

scholarly journals Edge-on Low Surface Brightness Galaxies in the SDSS and the Red Halo Phenomenon

2006 ◽  
Vol 2 (S235) ◽  
pp. 82-82
Author(s):  
Brady Caldwell ◽  
Nils Bergvall
Keyword(s):  
Surface Brightness ◽  
Stellar Population ◽  
High Surface ◽  
Disk Galaxies ◽  
High Surface Brightness ◽  
Polar Direction ◽  
Low Surface Brightness ◽  
Compact Galaxies ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

AbstractExtremely red halos have been detected around high surface brightness (HSB) disk galaxies and blue compact galaxies. We analyse the halo emission of a sample of 970 stacked edge-on low surface brightness (LSB) galaxies in the SDSS (DR4) down to μg ~ 30 mag arcsec−2. These are divided by g − r colour limits into a “blue” Sample A (336 galaxies), “yellow” Sample B (318 galaxies) and “red” Sample C (316 galaxies). The gri colours indicate a prominent red excess in the polar direction, strongly deviating from any normal stellar population.

scholarly journals Low Surface Brightness Galaxies in Deep Surveys

1999 ◽  
Vol 171 ◽  
pp. 76-83
Author(s):  
Henry C. Ferguson
Keyword(s):  
Surface Brightness ◽  
Dwarf Galaxies ◽  
Recent Literature ◽  
Solid Angle ◽  
Large Space ◽  
Space Density ◽  
Faint Galaxy ◽  
Low Surface Brightness ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

AbstractWe examine the constraints that can be placed on the space density of low-surface-brightness galaxies from deep HST images. Such images, while covering only a small solid angle, provide enough depth and spatial resolution to detect LSB galaxies at moderate redshift and distinguish them from galaxies of higher surface brightness.We consider five simple models of the non-evolving or slowly-evolving population of LSB galaxies, motivated by various discussions in the recent literature. The basic results are (1) models with a large space-density of giant LSB galaxies at moderate redshift do not look like the real world and, (2) models with a large space-density of dwarf LSB galaxies are consistent with HST data (that is, they do not produce more faint LSB galaxies per unit solid angle than are detected at magnitudes I ≳ 23), but these LSB dwarf galaxies do not contribute much to faint galaxy counts unless they formed their stars in a rapid burst.

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