Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/315
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dc.contributor.authorDojčinović, Ivanen
dc.contributor.authorKovačević-Dojčinović, Jelenaen
dc.contributor.authorPopović, Lukaen
dc.date.accessioned2022-07-12T15:09:06Z-
dc.date.available2022-07-12T15:09:06Z-
dc.date.issued2022-01-01en
dc.identifier.issn0273-1177en
dc.identifier.urihttps://physrep.ff.bg.ac.rs/handle/123456789/315-
dc.description.abstractIn spectra of the Active Galactic Nuclei (AGNs), the [N II]λλ 6548, 6583 Å lines are commonly fitted using the fixed intensity ratio of these two lines (R[NII]=I6583/I6548). However, the used values for fixed intensity ratio are slightly different through literature. There are several theoretical calculations of the transition probabilities which can be used for the line ratio estimation, but there are no experimental measurements of this ratio, since the [N II] lines are extremely weak in laboratory plasma. Therefore, the intensity ratio of [N II] lines can be measured only in the spectra of astrophysical objects. However, precise and systematic measurements have not be done so far, because of difficulties in measurement of the [N II] ratio in various spectra (overlapping with Hα, weak intensity of [N II], influence of the continuum noise and outflow contribution, etc.). Here we present the measurements of the flux ratio of the [N II]λλ 6548, 6583 Å emission lines for a sample of 250 Type 2 AGNs spectra taken form Sloan Digital Sky Survey (SDSS) data base. The spectra are chosen to have high signal-to-noise ratio and to [N II] and Hα lines do not overlap. The obtained mean flux ratio from measurements is 3.049 ± 0.021. Our result is in agreement with theoretical result obtained by taking into account the relativistic corrections to the magnetic dipole operator.en
dc.relation.ispartofAdvances in Space Researchen
dc.subjectAtomic dataen
dc.subjectGalaxies: activeen
dc.subjectGalaxies: emission linesen
dc.titleThe flux ratio of the [N II]λλ 6548, 6583 Å lines in sample of Active Galactic Nuclei Type 2en
dc.typeArticleen
dc.identifier.doi10.1016/j.asr.2022.04.041en
dc.identifier.scopus2-s2.0-85129922898en
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/85129922898en
item.openairetypeArticle-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
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