Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27011
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bisogni, Susanna | en_US |
dc.contributor.author | Marconi, Alessandro | en_US |
dc.contributor.author | RISALITI, Guido | en_US |
dc.date.accessioned | 2020-09-01T07:36:20Z | - |
dc.date.available | 2020-09-01T07:36:20Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27011 | - |
dc.description.abstract | We present an analysis of the orientation effects in Sloan Digital Sky Survey (SDSS) quasar composite spectra. In a previous work, we have shown that the equivalent width (EW) of the [O III] λ5007 Å (vacuum rest wavelength 5008.24 Å) line is a reliable indicator of the inclination of the accretion disc. Here, we have selected a sample of ∼12 000 quasars from the SDSS 7th Data Release and divided it in subsamples with different values of EW_{[{O {III}]}}. We find inclination effects both on broad and narrow quasars emission lines, among which an increasing broadening from low to high EW for the broad lines and a decreasing importance of the blue component for the narrow lines. These effects are naturally explained with a variation of source inclination from nearly face-on to edge-on, confirming the goodness of EW_{[{O {III}]}} as an orientation indicator. Moreover, we suggest that orientation effects could explain, at least partially, the origin of the anticorrelation between [O III] and Fe II intensities, I.e. the well-known eigenvector 1. | en_US |
dc.language.iso | eng | en_US |
dc.title | Orientation effects on spectral emission features of quasars | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw2324 | en_US |
dc.identifier.scopus | 2-s2.0-85014795992 | en_US |
dc.identifier.isi | 000393646300029 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/464/1/385/2194687 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 464 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 385 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 3 | en_US |
dc.description.international | no | en_US |
dc.contributor.country | ITA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017MNRAS.464..385B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0003-3746-4565 | - |
crisitem.author.orcid | 0000-0002-9889-4238 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
stw2324.pdf | PDF editoriale | 2.68 MB | Adobe PDF | View/Open |
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Items in DSpace are published in Open Access, unless otherwise indicated.