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The large-scale environment of low surface brightness galaxies

Rosenbaum, Dominik and Krusch, Elvira and Bomans, Dominik and Dettmar, Ralf-Jürgen (2009) The large-scale environment of low surface brightness galaxies. Astronomy and Astrophysics, 504 (3), pp. 807-820. EDP Sciences. DOI: 10.1051/0004-6361/20077462

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Context. 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. There is evidence that the lack of star formation expected to be typical of LSBs can only occur if the LSBs were formed in low-density regions. Aims. 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. Methods. 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). To avoid the influence of evolutionary effects depending of redshift and to minimize completeness issues within the SDSS, we limited the environment studies to the local universe with a redshift of z ≤ 0.1. At first we studied the luminosity distribution of the LSB sample obtained from the SDSS within two symmetric redshift intervals (0.01 < z ≤ 0.055 and 0.055 < z ≤ 0.1). Results. It was found that the lower redshift interval is dominated by small, low-luminosity LSBs, whereas the LSB sample in the higher redshift range mainly consists of larger, more luminous LSBs. This comes from selection effects of the SDSS spectroscopic sample. The environment studies, also divided into these 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%. Conclusions. Fromthese 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.

Item URL in elib:https://elib.dlr.de/60541/
Document Type:Article
Title:The large-scale environment of low surface brightness galaxies
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rosenbaum, Dominikdominik.rosenbaum (at) dlr.deUNSPECIFIED
Krusch, Elviraelvira.rosenbaum (at) dlr.deUNSPECIFIED
Date:September 2009
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1051/0004-6361/20077462
Page Range:pp. 807-820
Bertout, C.aanda.paris@obspm.fr
Publisher:EDP Sciences
Keywords:galaxies: distances and redshifts – galaxies: evolution – galaxies: statistics – galaxies: dwarf
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Photogrammetrie und Bildanalyse (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Rosenbaum, Dr.rer.nat. Dominik
Deposited On:03 Nov 2009 08:14
Last Modified:08 Mar 2018 18:54

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