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Issue A&A
Volume 422, Number 1, July IV 2004
Page(s) L5 - L8
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20040185



A&A 422, L5-L8 (2004)
DOI: 10.1051/0004-6361:20040185

Letter

The environment of Low Surface Brightness galaxies

S. D. Rosenbaum and D. J. Bomans

Astronomisches Institut, Ruhr-Universität Bochum (AIRUB), Universitätsstr. 150, 44780 Bochum, Germany
    e-mail: [dominik.rosenbaum;bomans]@astro.rub.de

(Received 5 May 2004 / Accepted 26 May 2004 )

Abstract
Using the Early Data Release of the Sloan Digital Sky Survey (SDSS) we investigated the clustering properties of Low Surface Brightness (LSB) galaxies in comparison to normal, High Surface Brightness (HSB) galaxies. We selected LSB galaxies and HSB galaxies with well measured redshifts from the SDSS data base and performed three-dimensional neighbour counting analysis within spheres of radii between 0.8 Mpc and 8.0 Mpc. As a second analysis method we used an  $N{\rm th}$ neighbour analysis with  N varying from one to ten galaxies. Our results show significant differences between the galaxy densities of LSB galaxies and HSB galaxies on scales from 2 to 5 Mpc. At scales larger than 5 Mpc LSB and HSB galaxies share the same clustering properties. In the pie-slice diagrams the LSB galaxies appear to favour the inner rims of filaments as defined by the HSB galaxies, with a couple of LSB galaxies even being located inside the voids. Our results support the idea of gas-rich LSB galaxies forming and developing in low density regions without many galaxy interactions and just now reaching the filaments of the large scale structure.


Key words: galaxies: distances and redshifts -- galaxies: evolution -- galaxies: statistics

Offprint request: S. D. Rosenbaum, dominik.rosenbaum@astro.rub.de




© ESO 2004


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