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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20080522T000000
DTEND;TZID=Atlantic/Canary:20080522T010000
UID:iactalks-57
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/57
CREATED:2008-05-22T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:(1) Stellar disks in the intermediate redshift range: listening to 
 the galaxy evolution "Symphony".  (2) Unveiling the narrow-line Seyfert 1 
 nature of Mrk 573 using near-infrared spectroscopy
DESCRIPTION:(1) Stellar disks in the intermediate redshift range: listening
  to the galaxy evolution "Symphony".  (2) Unveiling the narrow-line Seyfer
 t 1 nature of Mrk 573 using near-infrared spectroscopy\nDr. Ruymán Azzoll
 ini, Dr. Cristina Ramos Almeida\n\n1) In this brief seminar (<~25 minut
 es+questions) I will present recent results on the study of "deep", high r
 esolution, surface brightness profiles of a sample of ~500 late-type galax
 ies in the redshift range 0.1—1.1, making use of publicly available 
 HST/ACS imaging of the GOODS-South field. We have classified and parameter
 ized, according to usual prescriptions in this kind of analysis, these pro
 files, with special emphasis put on the so called ``truncated'' disks. Thi
 s is the case in which, beyond a certain radius, termed as ``Break Radius'
 ', the exponentially decaying surface brightness profile along the stellar
  disk gives way to an even more abrupt exponential decay. This radius can 
 be taken as an spatial "scale" for the disk, as observed in a given band (
 in our case, the rest-frame B-band). Comparing with analogous analysis for
  galaxies in the Local Universe, as we have done, it is possible to extrac
 t valuable information on the evolution of several photometric properties 
 of the stellar disks of galaxies, related to the stellar populations distr
 ibutions. I will also present results on the analysis of the color profile
 s of this sample of galaxies, which have yield an interesting result which
  is, perhaps, the main reason that justifies calling this talk a "breaking
  news" seminar, as I will show. Summarizing, an overview of the results we
  have obtained will be given, and our conclusions on them, explaining how 
 they can be understood in the frame of Galaxy Evolution   (2) Based on hig
 h quality near-infrared spectroscopy (obtained with WHT/LIRIS) we reveal t
 hat the nucleus of Mrk 573 is an obscured Narrow-Line Seyfert 1 and not an
  archetypal Seyfert 2 as it has been classified until now. Currently only 
 four AGNs have been classified into this category. We have detected permit
 ted OI and FeII transitions, which indicates the existence of a high densi
 ty region similar to the BLRs detected in type 1 AGN.
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