Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-03-27
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
12 pages, 1 table, 1 figure - accepted for publication in ApJ Letters
Scientific paper
We test the recent claim by Hu et al. (2008) that FeII emission in Type 1 AGN shows a systematic redshift relative to the local source rest frame and broad-line Hbeta. We compile high s/n median composites using SDSS spectra from both the Hu et al. sample and our own sample of the 469 brightest DR5 spectra. Our composites are generated in bins of FWHM Hbeta and FeII strength as defined in our 4D Eigenvector 1 (4DE1) formalism. We find no evidence for a systematic FeII redshift and consistency with previous assumptions that FeII shift and width (FWHM) follow Hbeta shift and FWHM in virtually all sources. This result is consistent with the hypothesis that FeII emission (quasi-ubiquitous in type 1 sources) arises from a broad-line region with geometry and kinematics the same as that producing the Balmer lines.
Marziani Paola
Meadows Z.
Sulentic Jack W.
Zamfir Sebastian
No associations
LandOfFree
No Evidence for a Aystematic FEII Emission Line Redshift in Type 1 AGN does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with No Evidence for a Aystematic FEII Emission Line Redshift in Type 1 AGN, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No Evidence for a Aystematic FEII Emission Line Redshift in Type 1 AGN will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-641138