| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1780094 | New Astronomy Reviews | 2009 | 5 Pages |
Abstract
With the availability of large data sets like the Sloan Digital Sky Survey (SDSS) is it now possible to study a huge amount of galaxy spectra in a statistical manner. The spectroscopical data set of the seventh SDSS data release covers 9380Â deg2 (â23% of the whole sky). We selected nearly 1Â 00Â 000 objects from this SDSS data release 7 that were spectroscopically classified as quasars to investigate their environment. We developed a dedicated software-pipeline to process this enormous amount of data. We classified all galaxies within the Quasar/AGN-neighbourhood of 1Â Mpc according to Kauffmann (2003) and Kewley et al. (2006) by mean of a diagnostic BPT diagram. For doing this we had to measure the narrow Balmer-line components manually. Furthermore, we studied the distribution of these objects in the QSO/AGN environment as well as their spectroscopical properties and the absolute magnitudes.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
M. Zetzl, W. Kollatschny,