Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-08-27
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Astronomy & Astrophysics in press
Scientific paper
The exact formation scenarios and evolutionary processes that led to the existence of the class of low surface brightness galaxies (LSBs) have not yet been understood completely. Since the environment of LSBs has been studied before only on small scales (below 2 Mpc), a study of the galaxy content in the vicinity of LSB galaxies on larger scales could add a lot to our understanding of the origin of this galaxy class. We used the spectroscopic main galaxy sample of the SDSS DR4 to investigate the environmental galaxy density of LSB galaxies compared to the galaxy density in the vicinity of high surface brightness galaxies (HSBs). The environment studies, divided into two redshift bins, show that both the low mass, and the more massive LSBs possess an environment with a lower galaxy density than HSBs. The differences in the galaxy density between LSBs and HSBs are significant on scales between 2 and 5 Mpc, the scales of groups and filaments. To quantify this, we have introduced for the first time the LSB-HSB Antibias. The obtained LSB-HSB Antibias parameter has a value of 10%-15%. From these results we conclude that LSBs formed in low-density regions of the initial universe and have drifted until now to the outer parts of the filaments and walls of the large-scale structure. Furthermore, our results, together with actual cosmological simulations, show that LSBs are caused by a mixture of nature and nurture.
Bomans Dominik J.
Dettmar Ralf-Juergen
Krusch Elvira
Rosenbaum Stefan Dominik
No associations
LandOfFree
The large-scale environment of low surface brightness galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The large-scale environment of low surface brightness galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The large-scale environment of low surface brightness galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411822