Spectral monitoring of AGNs: Preliminary results for Ark 564 and Arp 102B

TL;DR

This study reports preliminary findings from a long-term spectral monitoring project of two active galactic nuclei with distinct emission line features, using data collected over a decade from multiple telescopes.

Contribution

It provides the first long-term spectral data comparison of Ark 564 and Arp 102B, highlighting differences in their broad line regions.

Findings

Ark 564 shows narrow permitted lines and high FeII/Hβ ratio.

Arp 102B exhibits broad double-peaked Balmer lines.

Spectral data collected over 11-12 years from multiple observatories.

Abstract

We present preliminary results of the long term spectral monitoring of two active galactic nuclei with different broad line shapes: Ark 564 and Arp 102B. Ark 564 is a bright nearby narrow line Syfert 1 (NLS1) galaxy with relatively narrow permitted optical emission lines and a high FeII/H${\beta}$ ratio, while Arp 102B is a nearby broad-line radio galaxy with broad double-peaked Balmer emission lines. The spectra of Ark 564 were observed during 11-year period (1999-2009) and the spectra of Arp 102B in the 12-year period (1998-2009), with SAO 6-m and 1-m telescopes (Russia) and the GHAO 2.1-m telescope (Cananea, Mexico).