SPECTRAL OPTICAL MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY Ark 564
Por:
Shapovalova A.I., Popovic L.C., Burenkov A.N., Chavushyan V.H., Ilic D., Kovacevic, A, Kollatschny W., Kovacevic, J, Bochkarev N.G., Valdes J.R., Torrealba J., León-Tavares J., Mercado A., Benítez E., Carrasco L., Dultzin D., De La Fuente E.
Publicada:
1 sep 2012
Resumen:
We present the results of a long-term (1999-2010) spectral optical monitoring campaign of the active galactic nucleus (AGN) Ark 564, which shows a strong Fe II line emission in the optical. This AGN is a narrow-line Seyfert 1 (NLS1) galaxy, a group of AGNs with specific spectral characteristics. We analyze the light curves of the permitted H alpha, H beta, optical Fe II line fluxes, and the continuum flux in order to search for a time lag between them. Additionally, in order to estimate the contribution of iron lines from different multiplets, we fit the H beta and Fe II lines with a sum of Gaussian components. We find that during the monitoring period the spectral variation (F-max/F-min) of Ark 564 is between 1.5 for H alpha and 1.8 for the Fe ii lines. The correlation between the Fe ii and H beta flux variations is of higher significance than that of H alpha and H beta (whose correlation is almost absent). The permitted-line profiles are Lorentzian-like and do not change shape during
Filiaciones:
Shapovalova A.I.:
Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz, Karachaevo-Cherkesia 369167, Russian Federation
Popovic L.C.:
Astronomical Observatory, Volgina 7, 11160 Belgrade 74, Serbia
Isaac Newton Institute of Chile, Yugoslavia Branch, Belgrade, Serbia
Burenkov A.N.:
Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz, Karachaevo-Cherkesia 369167, Russian Federation
Chavushyan V.H.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Apartado Postal 51-216, 72000 Puebla, Mexico
Ilic D.:
Isaac Newton Institute of Chile, Yugoslavia Branch, Belgrade, Serbia
Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
Kollatschny W.:
Institut für Astrophysik, Georg-August-Universität, Göttingen, Germany
Bochkarev N.G.:
Sternberg Astronomical Institute, Moscow, Russian Federation
Valdes J.R.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Apartado Postal 51-216, 72000 Puebla, Mexico
Torrealba J.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Apartado Postal 51-216, 72000 Puebla, Mexico
León-Tavares J.:
Aalto University Metsähovi Radio Observatory, Metsähovintie 114, FIN-02540 Kylmälä, Finland
Mercado A.:
Universidad Politécnica de Baja California, Av. de la Industria 291, B.C. 21010 Mexicali, Mexico
Benítez E.:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
Carrasco L.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Apartado Postal 51-216, 72000 Puebla, Mexico
Dultzin D.:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
De La Fuente E.:
Instituto de Astronomía y Meteorología, Dpto. de Física CUCEI, Universidad de Guadalajara, Av. Vallarta 2602, 44130 Guadalajara, Jalisco, Mexico
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