Quasars & Active Galaxies

Recent Publications

• Active Galactic Nuclei Emission-Line Properties Versus the Eddington Ratio
  C. Warner, F. Hamann, & M. Dietrich. 2004, ApJ, 608, 136

• A Relation Between Supermassive Black Hole Mass and Quasar Metallicity?
  C. Warner, F. Hamann, & M. Dietrich. 2003, ApJ, 596, 72

• The Metallicity of the Redshift 4.16 Quasar BR2248-1242
  C. Warner, F. Hamann, J.C. Shields, A. Constantin, C.B. Foltz, and F.H. Chaffee. 2002, ApJ, 567, 68

• Metallicities and Abundance Ratios from Quasars Broad Emission Lines. F. Hamann, K.T. Korista, G.J. Ferland, C. Warner, and J. Baldwin. 2002, ApJ, 564, 592.

• High Redshift Quasars and Star Formation History. M. Dietrich & F. Hamann, 2002, ApJ, 564, 581

• High-Redshift Quasars and Star Formation History
  M. Dietrich & F. Hamann in Proc.Conf. on Astrophysical Ages and Timescales, 2001, ASP Conf.Series, Vol.245, eds T.von Hippel, C.Simpson, and N.Manset,p.575

• Quasar Evolution and Star Formation History, M.Dietrich, F. Hamann, I. Appenzeller, M. Vetsergaard, & S.J. Wagner, 2002, in ESO Astrophysics Symp. `Lighthouses of the Universe: The Most Luminous Celestial Objects and their Use for Cosmology', eds R.Sunyaev et al.

• PG1254+047: An intrinsically X-ray weak, heavily absorbed broad absorption line quasar?, B.M. Sabra and F. Hamann. 2001, ApJ 563, 555

• A Spectroscopic and Photometric Study of Short-Timescale Variability in NGC 5548
  M. Dietrich, et al., 2001, A&A, 371, 79.

• High Redshift Quasars and Star Formation in the Early Universe
  M. Dietrich, I. Appenzeller, M. Vestergaard, S.J. Wagner. 2002, ApJ, 564, 581

• X-ray Absorption Associated with High-Velocity UV Absorbers
  B. M. Sabra et al., 2001, ASP Conf. Series, Mass Outflows in Active Nuclei: New Perspectives

• Intrinsic Absorption Phenomena in AGNs, F. Hamann & W.N. Brandt, 2001, PASP, invited review, in preparation

• The Nature of Associated Absorption and the Ultraviolet-X-Ray Connection in 3C288.1
  F.Hamann, H.Netzer, and J.C.Shields 2000, ApJ, 536, 101

• Thompson Thick X-Ray Absorption in the Broad Absorption Line Quasar, PG 0946+301
  S. Mathur, ... F. Hamann, 2000, ApJ, 533, L79

• Elemental abundances of high redshift quasars
  M.Dietrich and U.Wilhelm-Erkens 2000, AuA, 354, 17

• Probing the High-Redshift Universe with Quasar Elemental Abundances
  F. Hamann, 1999, in ``Quasars and Cosmology,'' ed. G.J. Ferland and J. Baldwin, ASP Conf. series, 162, 409

• Structure of the broad-line region of 3C273
  M.Dietrich, S.J.Wagner, T.J.-L.Courvoisier, H.Bock, and P.North 1999, AuA, 351, 31

• Elemental Abundances in QSOs - Star Formation and Galactic Nuclear Evolution at High Redshifts
  F.Hamann & G.Ferland 1999, Ann.Rev.Astron & Astrophys. 37, 487

• Spectroscopic study of high redshift quasars
  M.Dietrich, I.Appenzeller, S.J.Wagner, et al. 1999, AuA, 352, L1

• Broad PV Absorption in the Quasar PG1254+047: Column Densities, Ionizations, and Metal Abundances in Broad Absorption Line Winds
  F.Hamann 1998, ApJ, 500, 798

• Broad NeVIII774 Emission from Quasars
  F.Hamann, R.D.Ross, J.C.Shields, et at. 1998, ApJ, 496, 761

• Kinematics of the narrow-line region of NGC1068
  M.Dietrich and S.J.Wagner 1998, AuA, 338, 405
  

• Numerical Simulations of FeII Emission Spectra
  E.M. Verner, D.A. Verner, K.T. Korista, J.W. Ferguson, F. Hamann, & G.J. Ferland, 1998, ApJS, 120, 101

• Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII.Ground-based Monitoring of 3C390.3
  M.Dietrich, B.M.Peterson, P.Albrecht, et al. 1998, ApJS, 115, 185

• High Resolution Spectra of Intrinsic Absorption Lines in the QSO UM~675
  F. Hamann, T.A. Barlow, V.T. Junkkarinen, & E.M. Burbidge, 1997, ApJ, 478, 80

• Metal Abundances and Ionization in Quasar Intrinsic Absorbers
  F.Hamann 1997, ApJS, 109, 279

• Hot Winds Stay in the Plane, (invited summary of the workshop on Mass Ejection From AGN, Pasadena, February 1997)
  F. Hamann, Nature, 386, 331

• Time-Variable Intrinsic Absorption Lines in the QSO Q2343+125
  F. Hamann, T.A. Barlow, & V.T. Junkkarinen, 1997, ApJ, 478, 87

• On the Nature of Ultraviolet and X-ray Absorption in NGC 3783
  J.C. Shields, & F. Hamann, 1997, ApJ, 481, 752

• The Nature and Origin of za~ze Absorption Lines in the Redshift 0.20 Quasar, PKS 2135-147
  F. Hamann, E.A. Beaver, R.D. Cohen, V. Junkkarinen, R W. Lyons, & E.M. Burbidge, 1997, ApJ, 488, 155

• High-Velocity Narrow-Line Absorbers in QSOs
  F. Hamann, T. Barlow, R. D. Cohen, V. Junkkarinen & E. M. Burbidge, 1997, in ``Mass Ejection From AGN,'' eds. R. Weymann, I. Shlosman, N. Arav, ASP Conf. Series, 128, 19

• Ionization and Abundances in Intrinsic QSO Absorption-Line Systems
  F. Hamann, T. Barlow, R. D. Cohen, V. Junkkarinen & E. M. Burbidge, 1997, in ``Mass Ejection From AGN,'' eds. R. Weymann, I. Shlosman, N. Arav, ASP Conf. Series, 128, 187

• Metal Abundances and Ionization in QSO Broad Emission-Line Regions
  F. Hamann, J.C. Shields, R.D. Cohen, V.T. Junkkarinen & E.M. Burbidge, 1997, in ``Emission Lines in Active Galaxies,'' ed. B. Peterson et al., ASP Conf. Series, 113, 96

• High Metal Enrichments in Luminous Quasars
  G.Ferland, J.A.Baldwin, K.T.Korista, F.Hamann, et al., 1996, ApJ, 461, 683

• Optical and ultraviolet emission-line variability of NGC5548
  M.Dietrich and W.Kollatschny, 1995, AuA, 303, 405
  

This page created by Matthias Dietrich and Craig Warner
Questions or comments should be sent to: Matthias Dietrich