Do Low Surface Brightness Galaxies Host Stellar Bars?

The stellar populations of the bluest low surface brightness galaxies ⋆ , ⋆ ⋆

Using optical/near-IR broadband photometry together with Hα emission line data, we attempt to constrain the star formation histories, ages, total stellar masses and stellar mass-to-light ratios for a sample of extremely blue low surface brightness galaxies. We find that, under standard assumptions about the stellar initial mass function, the Hα equivalent widths of these objects appear inconsis...

The Stellar Populations of Low Surface Brightness Galaxies

Near-infrared (NIR) K ′ images of a sample of five low surface brightness disc galaxies (LSBGs) were combined with optical data, with the aim of constraining their star formation histories. Both red and blue LSBGs were imaged to enable comparison of their stellar populations. For both types of galaxy strong colour gradients were found, consistent with mean stellar age gradients. Very low stella...

Low Surface Brightness Galaxies

Deficiency of "Thin" Stellar Bars in Seyfert Host Galaxies.

Using all available major samples of Seyfert galaxies and their corresponding closely matched control samples of nonactive galaxies, we find that the bar ellipticities (or axial ratios) in Seyfert galaxies are systematically different from those in nonactive galaxies. Overall, there is a deficiency of bars with large ellipticities (i.e., "thin" or "strong" bars) in Seyfert galaxies compared to ...

The formation and evolution of bars in low surface brightness galaxies with cold dark matter halos

We perform several high resolution N-Body/SPH simulations of low surface brightness galaxies (LSBs) embedded in cold dark matter halos to study how likely is bar formation in such systems. The behavior of various collisionless galaxy models is studied both in isolation and in the presence of a large perturbing satellite. We also consider models with a dominant gaseous component in the disk. We ...