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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20141209T103000
DTEND;TZID=Atlantic/Canary:20141209T113000
UID:iactalks-738
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/738
CREATED:2014-12-09T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:FeII emission in active galactic nuclei: results from NIR Spectrosc
 opy
DESCRIPTION:FeII emission in active galactic nuclei: results from NIR Spect
 roscopy\nDr. Rodriguez Ardila\n\nFeII comprises up to one third of the lin
 e emission in AGNs. For that reason it is an important coolant that needs 
 to be taken into accountto fully understand the energetics of the broad li
 ne region (BLR). In thistalk I will discuss new approaches to study the ex
 citation mechanisms ofthe FeII based on a semi-empirical template we deriv
 ed in thenear-infrared region (NIR). We correlate the strength of the NIR 
 andoptical iron lines to assess the relative contribution of the different
 mechanisms that produces that emission. We found that in all casesLy_alpha
  fluorescence plays an important role, being a process that needsto be con
 sidered in any approach aimed at understanding this complexemission. We al
 so compare the width of the individual FeII lines with thatof other lines 
 emitted in BLR. Our results confirm previous assumptionsand results from v
 ariabilty studies that the gas responsible for the FeIIemission is the out
 er portion of the BLR.
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