Cross-correlation function of SDSS DR7 I-type AGNs and WiggleZ galaxies

• Published in: Kinematics and physics of celestial bodies Vol. 31; no. 1; pp. 1 - 12
• Main Authors: Ivashchenko, G. Yu, Vasylenko, O. V.
• Format: Journal Article
• Language: English
• Published: Heidelberg Allerton Press 2015; Springer Nature B.V
• Subjects: Active galactic nuclei; Astronomy; Astrophysics; Autocorrelation functions; Clusters; Distortion; Extragalactic Astronomy; Galaxies; Kinematics; Observations and Techniques; Physics; Physics and Astronomy; Quasars; Star formation; Stars & galaxies; Texts; X-rays; Angular Correlation Function; Cross Correlation Function; Active Galactic Nucleus; Celestial Body; Redshift Distribution
• ISSN: 0884-5913; 1934-8401
• DOI: 10.3103/S088459131501002X

Using our samples of I-type Active Galactic Nuclei (AGN) and blue galaxies from the SDSS DR7 and the WiggleZ DR1 surveys, parameters of their cross- and autocorrelation functions (ACF) were obtained. Analysis of the real-space ACF shows the presence of a steeper break for AGNs than for blue galaxies, which is in agreement with their evolution paradigm, according to which, in the late epoch, filaments are mainly populated by galaxies with star formation, while I-type AGNs are mainly formed in clusters. The value of β = 0.58 ± 0.08—which characterizes infall of objects onto matter overdensities—and the bias parameter for I-type AGNs
b
AGN
= 1.38 ± 0.19 for
—which agrees well with the results of other authors for one of I-type AGN subclasses, quasars, and also with the results for X-ray selected samples of different-type AGN—was obtained from the redshift-space distortions of the ACF.