Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-23T05:32:43.906Z Has data issue: false hasContentIssue false
  • English
  • Français

AGN outflows and its variability

Published online by Cambridge University Press:  28 October 2024

Vivek M Open the ORCID record for Vivek M [Opens in a new window] ,
Akhil Nair  and
Sapna Mishra
Vivek M*
Affiliation:
Indian Institute of Astrophysics, Koramangala, Bangalore - 560034, India
Akhil Nair
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA
Sapna Mishra
Affiliation:
IUCAA, Post Bag 04, Ganeshkhind, Pune - 411007, India
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The radiative mode of AGN feedback, operated through outflows, plays an essential role in the evolution of galaxies. Quasar outflows are detected as blue-shifted broad absorption lines in the UV/optical spectra of quasars. Thanks to the Sloan digital sky survey, 100,000 broad absorption line quasars are available now for ensemble statistical studies. This rich dataset has also enabled us to identify some peculiar cases of these sources. By quantifying the BAL fraction in radio-loud BAL quasars, our studies demonstrate a clear trend of increasing BAL fraction as the viewing angle approaches an edge-on orientation, favoring the orientation model of BAL quasars. Also, by contrasting the properties of BAL quasars with appearing and disappearing BAL troughs, our analysis suggests that the extreme variations in BAL troughs are driven by ionization changes.

Keywords

Active GalaxiesQuasar outflowsBroad Absorption Lines
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S378: Black Hole Winds at All Scales , December 2023 , pp. 16 - 21
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Ferrarese, L. and Merritt, D.: 2000, The Astrophysical Journal 539, L9. doi: 10.1086/312838.CrossRefGoogle Scholar
Gebhardt, K., Bender, R., Bower, G., Dressler, A., Faber, S.M., Filippenko, A.V., and, …: 2000, The Astrophysical Journal 539, L13. doi: 10.1086/312840.CrossRefGoogle Scholar
Kauffmann, G. and Haehnelt, M.: 2000, Monthly Notices of the Royal Astronomical Society 311, 576. doi: 10.1046/j.1365-8711.2000.03077.x.CrossRefGoogle Scholar
Di Matteo, T., Springel, V., and Hernquist, L.: 2005, Nature 433, 604. doi: 10.1038/nature03335.CrossRefGoogle Scholar
Fabian, A.C.: 2012, Annual Review of Astronomy and Astrophysics 50, 455. doi: 10.1146/annurev-astro-081811-125521.CrossRefGoogle Scholar
Weymann, R.J., Morris, S.L., Foltz, C.B., and Hewett, P.C.: 1991, The Astrophysical Journal 373, 23. doi: 10.1086/170020.CrossRefGoogle Scholar
Vivek, M.: 2019, Monthly Notices of the Royal Astronomical Society 486, 2379. doi: 10.1093/mnras/stz947.CrossRefGoogle Scholar
Vivek, M., Srianand, R., and Dawson, K.S.: 2018, Monthly Notices of the Royal Astronomical Society 481, 5570. doi: 10.1093/mnras/sty2712.CrossRefGoogle Scholar
Filiz Ak, N., Brandt, W.N., Hall, P.B., Schneider, D.P., Anderson, S.F., Hamann, F., and, …: 2013, The Astrophysical Journal 777, 168. doi: 10.1088/0004-637X/777/2/168.CrossRefGoogle Scholar
Elvis, M.: 2000, The Astrophysical Journal 545, 63. doi: 10.1086/317778.CrossRefGoogle Scholar
Farrah, D., Lacy, M., Priddey, R., Borys, C., and Afonso, J.: 2007, The Astrophysical Journal 662, L59. doi: 10.1086/519492.CrossRefGoogle Scholar
Gibson, R.R., Brandt, W.N., Schneider, D.P., and Gallagher, S.C.: 2008, The Astrophysical Journal 675, 985. doi: 10.1086/527462.CrossRefGoogle Scholar
Trump, J.R., Hall, P.B., Reichard, T.A., Richards, G.T., Schneider, D.P., Vanden Berk, D.E., and, …: 2006, The Astrophysical Journal Supplement Series 165, 1. doi: 10.1086/503834.CrossRefGoogle Scholar
Ganguly, R. and Brotherton, M.S.: 2008, The Astrophysical Journal 672, 102. doi: 10.1086/524106.CrossRefGoogle Scholar
Dai, X., Morabito, L.K., Shankar, F., Sivakoff, G.R., and Leighly, K.M.: 2012, AGN Winds in Charleston 460, 120.Google Scholar
Morabito, L.K., Dai, X., Leighly, K.M., Sivakoff, G.R., and Shankar, F.: 2014, The Astrophysical Journal 786, 58. doi: 10.1088/0004-637X/786/1/58.CrossRefGoogle Scholar
Kimball, A.E., Ivezić, Ž., Wiita, P.J., and Schneider, D.P.: 2011, The Astronomical Journal 141, 182. doi: 10.1088/0004-6256/141/6/182.CrossRefGoogle Scholar
Mishra, S., Vivek, M., Chand, H., and Joshi, R.: 2021, Monthly Notices of the Royal Astronomical Society 504, 3187. doi: 10.1093/mnras/stab782.CrossRefGoogle Scholar
Nair, A. and Vivek, M.: 2022, Monthly Notices of the Royal Astronomical Society 511, 4946. doi: 10.1093/mnras/stac204.CrossRefGoogle Scholar
Shen, Y. and Ho, L.C.: 2014, Nature 513, 210. doi: 10.1038/nature13712.CrossRefGoogle Scholar
Yong, S.Y., Webster, R.L., King, A.L., Bate, N.F., Labrie, K., and O’Dowd, M.J.: 2020, Monthly Notices of the Royal Astronomical Society 491, 1320. doi: 10.1093/mnras/stz3074.Google Scholar
Lundgren, B.F., Wilhite, B.C., Brunner, R.J., Hall, P.B., Schneider, D.P., York, D.G., and, …: 2007, The Astrophysical Journal 656, 73. doi: 10.1086/510202.CrossRefGoogle Scholar
Capellupo, D.M., Hamann, F., Shields, J.C., Halpern, J.P., and Barlow, T.A.: 2013, Monthly Notices of the Royal Astronomical Society 429, 1872. doi: 10.1093/mnras/sts427.CrossRefGoogle Scholar
Vivek, M., Srianand, R., Petitjean, P., Mohan, V., Mahabal, A., and Samui, S.: 2014, Monthly Notices of the Royal Astronomical Society 440, 799. doi: 10.1093/mnras/stu288.CrossRefGoogle Scholar
Rogerson, J.A., Hall, P.B., Ahmed, N.S., Rodrguez Hidalgo, P., Brandt, W.N., and Filiz Ak, N.: 2018, The Astrophysical Journal 862, 22. doi: 10.3847/1538-4357/aabfe5.CrossRefGoogle Scholar
Grier, C.J., Brandt, W.N., Hall, P.B., Trump, J.R., Filiz Ak, N., Anderson, S.F., and, …: 2016, The Astrophysical Journal 824, 130. doi: 10.3847/0004-637X/824/2/130.CrossRefGoogle Scholar
Lu, W.-J. and Lin, Y.-R.: 2019, The Astrophysical Journal 887, 178. doi: 10.3847/1538-4357/ab53d7.CrossRefGoogle Scholar