Advertisement

Absorption Systems in High Redshift QSOs

  • A. Boksenberg
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 74)

Abstract

In addition to the characteristic emission lines, absorption lines frequently are seen in the spectra of QSOs, usually those with high redshift (zem ≳ 1.8). About 10 percent of all QSOs listed in the compilation of Burbidge et al, (1976a) are recorded as having at least one ‘identified’ absorption system, meaning that a pattern of several selected observed lines can be matched with the apparent wavelengths of transitions (generally from the ground level) in a physical plausible group of atoms or ions at the same, although arbitrary, redshift (Bahcall 1968, Aaronson et al. 1975). Identified absorption line redshifts range from being comparable with the associated emission line redshifts, to having very much smaller values with relative velocities exceeding 0.5c in the OSO frame. Added to this, there are many QSOs having absorption lines not yet recognised as belonging to identified systems, both those objects already having one or more identifications, and others with none.

Keywords

Absorption Line Absorption System Column Density High Redshift Neutral Hydrogen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aaronson, M., McKee, C.F., and Weisheit, J.C. 1975, Ap.J., 198, 13.ADSCrossRefGoogle Scholar
  2. Anderson, K.S., and Kraft, R.P. 1969, Ap.J., 158, 859.ADSCrossRefGoogle Scholar
  3. Arons, J, 1972, Ap.J., 172, 553.ADSCrossRefGoogle Scholar
  4. Arp, H., and Bertola, F. 1969, Ap, Letters, 4, 23.ADSGoogle Scholar
  5. Arp, H., and Bertola, F. 1971, Ap.J., 163, 195.ADSCrossRefGoogle Scholar
  6. Bahcall, J.N., Sargent, W.L.W., and Schmidt, M, 1967, Ap, J. (Letters), 149, L11.ADSCrossRefGoogle Scholar
  7. Bahcall, J N., 1968, Ap.J., 153, 679.ADSCrossRefGoogle Scholar
  8. Bahcall, J.N., and Wolfe, R.A. 1968, Ap.J., 152, 701.ADSCrossRefGoogle Scholar
  9. Bahcall, J.N., and Peebles, P.J.E. 1969, Ap.J.(Letters), 156, L7.ADSCrossRefGoogle Scholar
  10. Bahcall, J.N., and Spitzer, L. 1969, Ap.J.(Letters), 156, L63.ADSCrossRefGoogle Scholar
  11. Bahcall, J.N. 1971, A.J., 76, 283.ADSCrossRefGoogle Scholar
  12. Bahcall, J.N. 1975, Ap.J.(Letters), 200, L1.ADSCrossRefGoogle Scholar
  13. Baldwin, J.A., Burbidge, E.M., Burbidge, G.R., Hazard C., Robinson, L.B. and Wampler, E.J, 1974, A.P., 193, 513.Google Scholar
  14. Blumenthal, G.R., and Mathews, W.G. 1974, Ap.J., 198, 517.ADSCrossRefGoogle Scholar
  15. Boksenberg, A., Kirkham, B., Michelson, E., Pettini, M., Bates, B., Carson, P.P.D., Courts, G.R., Dufton, P.L., and McKeith, C.D. 1975, Phil.Trans.R.Soc.Lond.A., 279, 303.ADSCrossRefGoogle Scholar
  16. Boksenberg, A., and Sargent, W.L.W. 1975, Ap.J., 198, 31.ADSCrossRefGoogle Scholar
  17. Boksenberg, A., Shortridge, K., Allen, D.A., Fosbury, R.A.E., Penston, M.V., and Savage, A. 1975, Mon.Not.R.Astr.Soc., 173, 381.ADSGoogle Scholar
  18. Boksenberg, A., Carswell, R.F., Allen, D.A., Fosbury, R. A.E., Penston, M.V., and Sargent, W.L.W. 1976, Mon.Not.R.Astr.Soc., (in press).Google Scholar
  19. Boksenberg, A., and Penston, M.V. 1976, Non.Not. R.Astr. Soc., (in press).Google Scholar
  20. Boroson, T., Sargent, W.L.W., Boksenberg, A., and Carswell, R.F. 1976 (in preparation).Google Scholar
  21. Brown, R.L., and Roberts, M.S. 1973, Ap, J.(Letters), 184, L7.ADSCrossRefGoogle Scholar
  22. Burbidge, E.M., 1968, Ap.J.(Letters), 152, L111.ADSCrossRefGoogle Scholar
  23. Burbidge, E.M. 1970, Ap.J.(Letters), 160, L33.ADSCrossRefGoogle Scholar
  24. Burbidge, E.M., and Burbidge, G.R. 1975, Ap.J., 202, 287.ADSCrossRefGoogle Scholar
  25. Burbidge, E.M., Caldwell, R.D., Smith, H.E., Liebert, J, and Spinrad, H. 1976b, Ap.J.(Letters), 205, L117.ADSCrossRefGoogle Scholar
  26. Burbidge, G.R. 1975, Ap.J. (Letters), 196, L7.ADSCrossRefGoogle Scholar
  27. Burbidge, G.R., Crowne, A.H., and Smith, H.E, 1976a, (submitted to Ap. J.Suppl.,).Google Scholar
  28. Burbidge, G.R., and Perry, J, J. 1976 (preprint).Google Scholar
  29. Carswell, R.F., Strittmatter, P. A., Williams, R, E., Beaver, E A., and Harms, R. 1975, Ap.J., 195, 269.ADSCrossRefGoogle Scholar
  30. Carswell, R.F., Boksenberg, A., and Sargent, W.L.W. 1976 (in preparation).Google Scholar
  31. Carswell, R.F., Coleman, G. Strittmatter, P.A., and Williams, R.E. 1976 (preprint).Google Scholar
  32. Coleman, G., Carswell, R.F., Strittmatter, P.A., Williams, R.E., Baldwin, J., Robinson, L.B., and Wampler, E.J. 1976, Ap, J., 207, 1.ADSCrossRefGoogle Scholar
  33. Davies, R, D, 1974, in J.R. Shakeshaft (ed), ‘The Formation and Dynamics of Galaxies’, IAU Symposium No. 58, p.119.Google Scholar
  34. de Vaucouleurs, G. 1969, Ap.Letters, 4, 17.ADSGoogle Scholar
  35. de Vaucouleurs, G., and Corwin, H.G. 1975, Ap.J., 202, 327.ADSCrossRefGoogle Scholar
  36. Disney, M.J. 1976, Nature, 263, 573.ADSCrossRefGoogle Scholar
  37. Gott, J.R., and Thuan, T.X. 1976, Ap.J., 204, 649.ADSCrossRefGoogle Scholar
  38. Grewing, M., and Mebold, U. 1975, Astr. & Ap., 42, 119.ADSGoogle Scholar
  39. Haschick, A.D., and Burke, B.F., 1975, Ap.J.(Letters), 200, L137.ADSCrossRefGoogle Scholar
  40. Huchtmeier, W.K., Tanmann, G.A., and Wendker, H.J, 1975, Astr, & Ap., 42, 205.ADSGoogle Scholar
  41. Kippenhahn, R., Perry, J.J., and Röser, H.-J, 1974, Astr. & Ap., 34, 211ADSGoogle Scholar
  42. Kippenhahn, R., Mestel, L., and Perry, J.J, 1975, Astr. & Ap., 44, 123.ADSGoogle Scholar
  43. Lowrance, J,O., Morton, D, C., Zucchino, P., Oke, J, B., and Schmidt, M. 1972, Ap.J., 233.Google Scholar
  44. Lynds, C.R. 1967, Ap.J., 147, 396.ADSCrossRefGoogle Scholar
  45. Lynds, C.R. 1971, Ap.J.(Letters), 164, L73.ADSCrossRefGoogle Scholar
  46. Lynds, C.R. 1972, in IAU Symposium No. 44: External Galaxies and Quasi-Stellar Objects, ed. D.S. Evans. Dordrecht: Reidel Publ.Co., p.127.Google Scholar
  47. Mathewson, D.S., Cleary, M.N., and Murray, J.D. 1974, Ap.J., 190, 291.ADSCrossRefGoogle Scholar
  48. Mathewson, D.S., Cleary, M.N., and Murray, J.D. 1975, Ap.J.(Letters), 195, L97.ADSCrossRefGoogle Scholar
  49. McKee, C.F., and Tarter, C.B. 1975, Ap.J., 202, 306.ADSCrossRefGoogle Scholar
  50. Mestel, L., Moore, D.W., and Perry, J.J. 1976, Astr. & Ap., 52, 203.ADSGoogle Scholar
  51. Morton, D.C., and Hu, E.M, 1975, Ap.J., 202, 638.ADSCrossRefGoogle Scholar
  52. Morton, D.C, 1976, Ap.J., 203, 386.ADSCrossRefGoogle Scholar
  53. Mushotzky, R.F., Solomon, P.M., and Strittmatter, P.A. 1972, Ap.J., 174, 7.ADSCrossRefGoogle Scholar
  54. Osterbrock, D.E., Koski, A.T., and Phillips, M.M. 1976, Ap.J.(Letters), 197, L41.ADSCrossRefGoogle Scholar
  55. Roberts, M.S., and Rots, A.H. 1973, Astr. & Ap., 26, 483.ADSGoogle Scholar
  56. Roberts, M.S., Brown, R.L., Brundage, W.D., Rots, A.H., Haynes, M.P., and Wolfe, A.M. 1976, A.J., 81, 293.ADSCrossRefGoogle Scholar
  57. Roeder, R.C., and Verreault, R.T. 1969, Ap.J., 155, 1047.ADSCrossRefGoogle Scholar
  58. Roeder, R.C. 1972, Ap.J., 171., 451.ADSCrossRefGoogle Scholar
  59. Rogstad, D.H., and Shostak, G.S. 1972, Ap.J., 176, 315.ADSCrossRefGoogle Scholar
  60. Rogstad, D.H., Lockhart, I.A., and Wright, M.C.H. 1974, Ap.J., 193, 309.ADSCrossRefGoogle Scholar
  61. Rose, W.K., and Tinsley, B.M. 1974, Ap.J., 190, 243.ADSCrossRefGoogle Scholar
  62. Röser, H.-J. 1975, Astr. & Ap., 45, 329.Google Scholar
  63. Sargent, W.L.W., and Boroson, T.A. 1976 (submitted to Ap.J.,).Google Scholar
  64. Scargle, J.D., Caroff, L.J., and Noerdlinger, P.D. 1970, Ap.J.(Letters), 161, L115.ADSCrossRefGoogle Scholar
  65. Scargle, J.D. 1973, Ap.J., 179, 705.ADSCrossRefGoogle Scholar
  66. Shostak, G.S. 1974, Astr. & Ap., 31, 97.ADSGoogle Scholar
  67. Stockton, A.N., and Lynds, C.R. 1966, Ap.J., 144, 451.ADSCrossRefGoogle Scholar
  68. Strittmatter, P.A., Carswell, R.F., Burbidge, E.M., Hazard, C., Baldwin, J.A., Robinson, L., and Wampler, E.J. 1973, Ap.J., 183, 767.ADSCrossRefGoogle Scholar
  69. Wagoner, R.V. 1967, Ap.J., 149, 465.ADSCrossRefGoogle Scholar
  70. Weymann, R.J. 1973, Comm.Ap, and Space Phys., 5, 139.ADSGoogle Scholar
  71. Weymann, R.J. 1976, Ap.J., 208, 286.ADSCrossRefGoogle Scholar
  72. Weymann, R.J., and Cromwell, R. 1972, in IAU Symposium No, 44; External Galaxies and Quasi-Stellar Objects, ed, D, S, Evans, Dordrecht: Reidel Publ.Co., p.155.Google Scholar
  73. Weymann, R.J., Williams, R.E., Beaver, E, A., and Miller, J.S, 1976 (preprint).Google Scholar
  74. Williams, R.E. 1972, Ap.J., 178, 105.ADSCrossRefGoogle Scholar
  75. Williams, R.E., Strittmatter, P.A., Carswell, R.F., and Craine, E.R. 1975, Ap.J., 202, 296.ADSCrossRefGoogle Scholar
  76. Williams, R.E., and Weymann, R.J, 1976, Ap.J.(Letters), 207, L143.ADSCrossRefGoogle Scholar
  77. Wolfe, A.M., Broderick, J J., Condon, J J., and Johnston, K J, 1976, Ap, J.(Letters), 208, L47.ADSCrossRefGoogle Scholar

Copyright information

© International Astronomical Union 1977

Authors and Affiliations

  • A. Boksenberg
    • 1
  1. 1.Department of Physics and AstronomyUniversity College LondonGreat Britain

Personalised recommendations