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Record 25 of 330
First direct comparison of high and low ionization line kinematics in active galactic nuclei
External Online Source: doi:10.1086/187896
Author and Affiliation:
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)
Abstract: We 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.
Publication Date: Jun 01, 1995
Document ID:
19950056292
(Acquired Dec 28, 1995)
Accession Number: 95A87891
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 445; 2; p. L85-L89
Publisher Information: United States
Contract/Grant/Task Num: NAS5-26555; NSF RII-89-96152
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACTIVE GALACTIC NUCLEI; CARBON; EMISSION SPECTRA; H BETA LINE; IONIZATION; KINEMATICS; QUASARS; RED SHIFT; HUBBLE SPACE TELESCOPE; RADIAL VELOCITY; RADIO SOURCES (ASTRONOMY)
Imprint And Other Notes: Astrophysical Journal, Part 2 - Letters vol. 445, no. 2 p. L85-L89 June 1, 1995
Availability Source: Other Sources
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