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Metallicity and black hole masses of z≃6 quasars

Published online by Cambridge University Press:  01 August 2006

Jaron D. Kurk ,
Fabian Walter ,
Dominik Riechers ,
Hans-Walter Rix ,
Stefan Wagner ,
Laura Pentericci  and
Xiaohui Fan
Jaron D. Kurk
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
Fabian Walter
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
Dominik Riechers
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
Hans-Walter Rix
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
Stefan Wagner
Affiliation:
Landessternwarte Heidelberg, Königstuhl 12, D-69117, Heidelberg, Germany
Laura Pentericci
Affiliation:
Osservatorio Astronomico di Roma, Via di Frascati 33, I-00040, Monte Porzio Catone, Italy
Xiaohui Fan
Affiliation:
Steward Observatory, The University of Arizona, 933 N. Cherry Av., Tucson, AZ 85721, USA
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Abstract

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We present NIR spectroscopy of emission lines of a sample of five z≃6 quasars, including fainter objects than observed before. The measured FeII/MgII ratios are around solar and consistent with a lack of evolution of the metallicity of quasar BLRs up to z≃6, suggesting that stars in their hosts formed at z≫6. The BH masses, measured from both MgII and CIV line widths are within the range 2-16×108M⊙, the smallest found in such distant objects.

Keywords

galaxies: high-redshiftgalaxies: fundamental parametersgalaxies: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 257
Copyright
Copyright © International Astronomical Union 2007

References

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