Skip to main content Accessibility help
×
Home

Quasar and Supermassive Black Hole Evolution

  • Scott M. Croom (a1), Stephen Fine (a1) (a2) and the 2SLAQ Survey Team

Abstract

We present results from statistical analysis of the largest quasar surveys currently in existence: the Sloan Digital Sky Survey (SDSS), the 2dF QSO Redshift Survey (2QZ), and the 2dF-SDSS LRG and QSO (2SLAQ) Survey. The quasar luminosity function shows highly significant (>99.9%) evidence of downsizing: the number density of faint quasars peaks at lower redshift than bright quasars. We measure the distribution of quasar broad-line widths as a function of luminosity, particularly focusing on the Mg ii λ2799 line. There is a clear trend, such that more luminous quasars show less scatter in line width than fainter quasars. However, the scatter in line width for any given luminosity (particularly in the brightest objects) is so small that it challenges our current understanding of virial black hole mass estimates.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Quasar and Supermassive Black Hole Evolution
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Quasar and Supermassive Black Hole Evolution
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Quasar and Supermassive Black Hole Evolution
      Available formats
      ×

Copyright

References

Hide All
Alexander, D. M., et al. 2003, AJ, 126, 539
Barger, A. J., et al. 2005, AJ, 129, 578
Bentz, M. C., et al. 2006, ApJ, 644, 133
Bongiorno, A., et al. 2007, A&A, 472, 443
Condon, J. J., Cotton, W. D., Greisen, E. W., Yin, Q. F., Perley, R. A., Taylor, G. B., & Broderick, J. J. 1998, AJ, 115, 1693
Cowie, L. L., Songaila, A., Hu, E. M., & Cohen, J. G. 1996, AJ, 112, 839
Croom, S. M., et al. 2009, MNRAS, 392, 19 (C09a)
Croom, S. M., et al. 2009, MNRAS, 399, 1755 (C09b)
Croom, S. M., Smith, R. J., Boyle, B. J., Shanks, T., Miller, L., Outram, P. J., & Loaring, N. S. 2004, MNRAS, 349, 1397
Fine, S., et al. 2008, MNRAS, 390, 1413
Hasinger, G., et al. 2001, A&A, 365, L45
Hasinger, G., Miyaji, T., & Schmidt, M. 2005, A&A, 441, 417
Hopkins, P. F., Hernquist, L., Cox, T. J., Di Matteo, T., Robertson, B., & Springel, V. 2005b, ApJ, 630, 716
Jiang, L., et al. 2006, AJ, 131, 2788
Juneau, S., et al. 2005, ApJ, 619, 135
Kaspi, S., et al. 2005, ApJ, 629, 61
Kollatschny, W. & Dietrich, M. 1996, A&A, 314, 43
Kormendy, J. & Richstone, D. 1995, ARAA, 33, 581
Mahony, E. K., Croom, S. M., Boyle, B. J., Edge, A. C., Mauch, T., & Sadler, E. M. 2010, MNRAS, 401, 1151
Mauch, T., et al. 2003, MNRAS, 342, 1117
McLure, R. J. & Dunlop, J. S. 2004, MNRAS, 352, 1390
McLure, R. J. & Jarvis, M. J. 2002, MNRAS, 337, 109
Miyaji, T., Hasinger, G., & Schmidt, M. 2001, A&A, 369, 49
Onken, C. A. & Peterson, B. M. 2002, ApJ, 572, 746
Richards, G. T., et al. 2006, AJ, 131, 2766
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525
Schneider, D. P., et al. 2007, AJ, 134, 102
Tremaine, S., et al. 2002, ApJ, 574, 740
Ueda, Y., Akiyama, M., Ohta, K., & Miyaji, T. 2003, ApJ, 598, 886
Vestergaard, M. & Peterson, B. M. 2006, ApJ, 641, 689
Wandel, A., Peterson, B. M., & Malkan, M. A. 1999, ApJ, 526, 579
Whittle, M. 1985, MNRAS, 213, 1
Wolf, C., Wisotzki, L., Borch, A., Dye, S., Kleinheinrich, M., & Meisenheimer, K. 2003, A&A, 408, 499
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed