SPECTRAL OPTICAL MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY Ark 564

dc.creatorVahram Chavushyan
dc.creatorJOSE RAMON VALDES PARRA
dc.creatorCLAUDIA JANET AMPARO TORREALBA GARCIA
dc.creatorLuis Carrasco Bazúa
dc.date2012-09
dc.date.accessioned2023-07-25T16:24:49Z
dc.date.available2023-07-25T16:24:49Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2041
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7807223
dc.descriptionWe 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 ιι 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 Hα, Hβ, optical Fe ιι 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 Hβ and Fe ιιlines with a sum of Gaussian components. We find that during the monitoring period the spectral variation (Fmax/Fmin) of Ark 564 is between 1.5 for Hα and 1.8 for the Fe ιιlines. The correlation between the Fe ιιand Hβ flux variations is of higher significance than that of Hα and Hβ (whose correlation is almost absent). The permitted-line profiles are Lorentzian-like and do not change shape during the monitoring period. We investigate, in detail, the optical Fe ιιemission and find different degrees of correlation between the Fe ιιemission arising from different spectral multiplets and the continuum flux. The relatively weak and different degrees of correlations between permitted lines and continuum fluxes indicate a rather complex source of ionization of the broad-line emission region.
dc.formatapplication/pdf
dc.languageeng
dc.publisherThe Astrophysical Journal Supplement Series
dc.relationcitation:Shapovalova, A. I., et al., (2012), SPECTRAL OPTICAL MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY Ark 564, The Astrophysical Journal Supplement Series, Vol. 202(1):1-22
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Gglaxies: active
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: individual (Ark 564)
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: Seyfert– Line: profiles
dc.subjectinfo:eu-repo/classification/Inspec/Quasars: emission lines
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/21
dc.subjectinfo:eu-repo/classification/cti/2105
dc.subjectinfo:eu-repo/classification/cti/220209
dc.subjectinfo:eu-repo/classification/cti/220209
dc.titleSPECTRAL OPTICAL MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY Ark 564
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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