NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
First direct comparison of high and low ionization line kinematics in active galactic nucleiWe present first results of a comparison of emission line shift properties for the high (HILs) and low (LILs) ionization lines in 43 low-reshift quasars. We identify a core sample of C IV lambda 1549 and hydrogen beta profiles with a wide distribution of red- and blueshifts (less than or equal to +/- 1000 km/sec). We also identify two tails in this distribution: one with large hydrogen beta redshifts (greater than or equal to 2000 km/sec) and another with large C IV blueshifts (greater than or equal to 1500 km/sec). The tails are mutually exclusive. All objects with extreme hydrogen beta redshift are radio loud, and all objects with extreme C IV blueshift are radio quiet. The core samples of smaller shifts can be most simply divided into: (1) hydrogen beta - a redshifted radio-loud population (related to the tail) and a radio-quiet population with mean shift near zero, and (2) C IV - a blueshifted radio-quiet population (related to the tail) and a radio-loud population with mean shift near zero. The results suggest fundamentally different kinematics for the HILs and LILs. They also suggest very different kinematics for radio-loud and radio-quiet active galactic nuclei. They also favor a predominance of radial motion in a large fraction of the sample.
Document ID
19950056292
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sulentic, J. W.
(University of Alabama, Tuscaloosa, Alabama United States)
Marziani, P.
(University of Alabama, Tuscaloosa, Alabama United States)
Dultzin-Hacyan, D.
(Instituto de Astronomia Apartado, Mexico)
Calvani, M.
(Osservatorio Astronomico Padova, Italy)
Moles, M.
(Instituto de Astrofisica de Andalucia Granada, Spain)
Date Acquired
August 16, 2013
Publication Date
June 1, 1995
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 445
Issue: 2
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
95A87891
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NSF RII-89-96152
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available