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Hβ spectra of high-redshift QSOs: Eigenvector 1 at high luminosities

Published online by Cambridge University Press:  01 December 2004

G. M. Stirpe ,
J. W. Sulentic ,
P. Marziani ,
R. Zamanov ,
M. Calvani  and
V. Braito
G. M. Stirpe
Affiliation:
INAF – Osservatorio Astronomico di Bologna, Via Ranzani 1, 40127 Bologna, Italy
J. W. Sulentic
Affiliation:
Dept. of Physics and Astronomy, Univ. of Alabama, Tuscaloosa, AL 35487, USA
P. Marziani
Affiliation:
INAF – Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122 Padova, Italy
R. Zamanov
Affiliation:
Astrophysics Research Inst., Liverpool John Moores Univ., Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
M. Calvani
Affiliation:
INAF – Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122 Padova, Italy
V. Braito
Affiliation:
INAF – Osservatorio Astronomico di Brera, Via Brera 28, 20121 Milano, Italy
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Abstract

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We present VLT–ISAAC spectra of unprecedented S/N and resolution for the Hβ region in a sample of n = 17 quasars in the range z=0.8–2.5. The data represent our first attempt to test source occupation and line properties for the Eigenvector 1 parameter space that was defined using a sample of sources with z<0.8. We find no strong luminosity/redshift dependent effects with the possible exception of an increase in the minimum broad line profile width from 1000 to 3000 km s−1 between MB≈−20 and −28.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 539 - 540
Copyright
© 2004 International Astronomical Union

Footnotes

Based on observations collected at the European Southern Observatory, Chile. Proposal ref.: ESO 68.B–0364(A)