Advertisement

Searching for dual active galactic nuclei

Article
  • 84 Downloads

Abstract

Binary or dual active galactic nuclei (DAGN) are expected from galaxy formation theories. However, confirmed DAGN are rare and finding these systems has proved to be challenging. Recent systematic searches for DAGN using double-peaked emission lines have yielded several new detections, as have the studies of samples of merging galaxies. In this paper, we present an updated list of DAGN compiled from published data. We also present preliminary results from our ongoing Expanded Very Large Array (EVLA) radio study of eight double-peaked emission-line AGN (DPAGN). One of the sample galaxy shows an S-shaped radio jet. Using new and archival data, we have successfully fitted a precessing jet model to this radio source. We find that the jet precession could be due to a binary AGN with a super-massive black-hole (SMBH) separation of \(\sim \) 0.02 pc or a single AGN with a tilted accretion disk. We have found that another sample galaxy, which is undergoing a merger, has two radio cores with a projected separation of 5.6 kpc. We discuss the preliminary results from our radio study.

Keywords

Galaxy merger dual AGN radio observations 

Notes

Acknowledgements

The authors would like to thank the referee for insightful comments that improved the paper considerably. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under co-operative agreement by Associated Universities Inc. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the participating institutions. SDSS-IV acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS website is www.sdss.org. The authors would like to thank the organizers of the RETCO-2017 meeting.

References

  1. Albareti F. D., Allende Prieto C. et al. 2016, SDSS Collaboration, arXiv:1608.02013
  2. Barrows R. S., Stern D., Madsen K., Harrison F., Assef R. J., Comerford J. M., Cushing M. C. et al. 2012, ApJ, 744, 7ADSCrossRefGoogle Scholar
  3. Begelman M. C., Blandford R. D., Rees M. J. 1980, Nature, 287, 307ADSCrossRefGoogle Scholar
  4. Bianchi S., Chiaberge M., Piconcelli E., Guainazzi M., Matt G. 2008, MNRAS, 386, 105ADSCrossRefGoogle Scholar
  5. Bothun G. D., Schmitz M., Halpern J. P., Lonsdale C. J., Impey C. 1989, ApJS, 70, 271ADSCrossRefGoogle Scholar
  6. Burbidge G. R. 1959, ApJ, 129, 849ADSCrossRefGoogle Scholar
  7. Burke-Spolaor S., Brazier A., Chatterjee S., Comerford J., Cordes J., Lazio T. J. W., Liu X., Shen Y. 2014, preprint arXiv:1402.0548
  8. Civano F., Elvis M., Lanzuisi G., Jahnke K., Zamorani G. Blecha L., Bongiorno A. et al. 2010, ApJ, 717, 209ADSCrossRefGoogle Scholar
  9. Comerford J. M., Gerke B. F., Newman J. A. et al. 2009, ApJ, 698, 956ADSCrossRefGoogle Scholar
  10. Comerford J. M., Gerke B. F., Stern D., Cooper M. C., Weiner B. J., Newman J. A., Madsen K., Barrows R. S. 2012, Astrophys. J., 753, 42ADSCrossRefGoogle Scholar
  11. Comerford J. M., Pooley D., Gerke B. F., Madejski G. M. 2011, ApJL, 737, L19ADSCrossRefGoogle Scholar
  12. Comerford J. M., Pooley D., Barrows R. S., Greene J. E., Zakamska N. L., Madejski G. M., Cooper M. C. 2015, ApJ, 806, 219ADSCrossRefGoogle Scholar
  13. Das M., Rubinur K., Kharb P., Varghese A., Navyasree K., James A. 2017, ArXiv e-prints: arXiv:1708.01185
  14. Davis M., Gerke B. F., Newman J. A. 2004, arXiv:astro-ph/0408344
  15. Ellison S. L., Secret N. J., Mendel J. T., Satyapal S., Simard L. 2017, MNRAS, 470, 49ADSCrossRefGoogle Scholar
  16. Fu H., Wrobel J. M., Myers A. D., Djorgovski S. G., Yan, L. 2015, ApJ, 815, L6ADSCrossRefGoogle Scholar
  17. Fu H., Yan L., Myers A. D., Stockton A., Djorgovski S. G., Aldering G., Rich J. A. 2012, Astrophys. J., 745, 67ADSCrossRefGoogle Scholar
  18. Fu H., Myers A. D., Djorgovski S. G., Yan, L. 2011, ApJ, 733, 103ADSCrossRefGoogle Scholar
  19. Ge J.-Q., Hu C., Wang J.-M., Bai J.-M., Zhang S. 2012, Astrophys. J. Lett., 201, 31CrossRefGoogle Scholar
  20. Gerke B. F., Newman J. A., Lotz J. et al. 2007, ApJL, 660, 23ADSCrossRefGoogle Scholar
  21. Greene J. E., Ho L. C. 2005, Astrophys. J., 627, 721ADSCrossRefGoogle Scholar
  22. Hjellming R. M., Johnston K. J. 1981, Astrophys. J. Lett., 246, L141ADSCrossRefGoogle Scholar
  23. Hopkins P. F., Hernquist L. 2009, Astrophys. J., 694, 599ADSCrossRefGoogle Scholar
  24. Hovatta T., Aller M. F., Aller H. D. et al. 2014, AJ, 147, 143Google Scholar
  25. Hudson D. S., Reiprich T. H., Clarke T. E., Sarazin C. L. 2006, A&A, 453, 433ADSCrossRefGoogle Scholar
  26. Huang Y., Liu X.-W., Yuan H.-B. et al. 2014, MNRAS, 439, 2927ADSCrossRefGoogle Scholar
  27. Junkkarinen V., Shields G. A., Beaver E. A., Burbidge E. M., Cohen R. D., Hamann F., Lyons R. W. 2001, Astrophys. J. Lett., 549, L155ADSCrossRefGoogle Scholar
  28. Kharb P., Lal D. V., Merritt D. 2017a, Nature Astron., 1, 727ADSCrossRefGoogle Scholar
  29. Kharb P., Subramanian S., Vaddi S., Das M., Paragi Z. 2017b, ApJ, 846, 12ADSCrossRefGoogle Scholar
  30. Kharb P., Das M., Paragi Z., Subramanian S., Chitta L. P. 2015, ApJ, 799, 161ADSCrossRefGoogle Scholar
  31. Komossa S., Burwitz V., Hasinger G., Predehl P., Kaastra J. S., Ikebe Y. 2003, ApJ, 582, L15ADSCrossRefGoogle Scholar
  32. Koss M., Mushotzky R., Treister E. et al. 2012, ApJL, 746, 22ADSCrossRefGoogle Scholar
  33. Lehto H. J., Valtonen M. J. 1996, Astrophys. J., 460, 207ADSCrossRefGoogle Scholar
  34. Liu X., Greene J. E., Shen Y., Strauss M. A. 2010, Astrophys. J. Lett., 715, L30ADSCrossRefGoogle Scholar
  35. Liu X., Civano F., Shen Y., Green P., Greene J. E., Strauss M. A. 2013, Astrophys. J., 762, 11ADSCrossRefGoogle Scholar
  36. Lu J. F. 1990, Astron. Astrophys., 229, 424ADSGoogle Scholar
  37. Mazzarella J. M., Iwasawa K., Vavilkin T., Armus L., Kim D.-C., Bothun G., Evans A. S. et al. 2012, AJ, 144, 125ADSCrossRefGoogle Scholar
  38. Max C. E., Canalizo G., de Vries W. H. 2007, Science, 316, 1877ADSCrossRefGoogle Scholar
  39. McGurk R. C., Max C. E., Rosario D. J., Shields G. A., Smith K. L., Wright S. A. 2011, ApJ, 738L, 2Google Scholar
  40. McGurk R. C., Max C. E., Medling A. M., Shields G. A., Comerford J. M. 2015, ApJ, 811, 14ADSCrossRefGoogle Scholar
  41. McMullin J. P., Waters B., Schiebel D., Young W., Golap K. 2007, in Shaw R. A., Hill F., Bell D. J., eds, ASP Conference Series, Volume 376, Astronomical Data Analysis Software and Systems XVI. Astronomical Society of the Pacific, San Francisco, p. 127Google Scholar
  42. Mezcua M., Lobanov A. P., Mediavilla E., Karouzos M. 2014, ApJ, 784, 16ADSCrossRefGoogle Scholar
  43. Müller-Sánchez F., Comerford J. M., Nevin R., Barrows R. S., Cooper M. C., Greene J. E. 2015, ApJ, 813, 103ADSCrossRefGoogle Scholar
  44. Murgia M., Parma P., de Ruiter H. R., Bondi M., Ekers R. D., Fanti R., Fomalont E. B. 2001, A&A, 380, 102ADSCrossRefGoogle Scholar
  45. O’Dea C. P., Owen F. N. 1987, ApJ, 316, 95ADSCrossRefGoogle Scholar
  46. Rodriguez C., Taylor G. B., Zavala R. T., Peck A. B., Pol- lack L. K., Romani R. W. 2006, Astrophys. J., 646, 49ADSCrossRefGoogle Scholar
  47. Rosario D. J., Shields G. A., Taylor G. B., Salviander S., Smith K. L. 2010, Astrophys. J., 716, 131ADSCrossRefGoogle Scholar
  48. Rubinur, K., Das M., Kharb P., Honey M. 2017, MNRAS, 465, 4772ADSCrossRefGoogle Scholar
  49. Satyapal S., Secrest N. J., Ricci C., Ellison S. L., Rothberg B., Blecha L., Constantin A., Gliozzi M., McNulty P., Ferguson J. 2017, arXiv e-prints, arXiv:1707.03921
  50. Shangguan J., Liu X., Ho L. C. et al. 2016, ApJ, 823, 50ADSCrossRefGoogle Scholar
  51. Sillanpaa A., Haarala S., Valtonen M. J., Sundelius B., Byrd G. G. 1988, Astrophys. J., 325, 62ADSCrossRefGoogle Scholar
  52. Smith K. L., Shields G. A., Bonning E. W. et al. 2010, ApJ, 716, 866ADSCrossRefGoogle Scholar
  53. Springel V., 2005, MNRAS, 364, 1105ADSCrossRefGoogle Scholar
  54. Teng S. H., Schawinski K., Urry C. M. et al. 2012, ApJ, 753, 165ADSCrossRefGoogle Scholar
  55. van der Laan H., Perola G. C. 1969, A&A, 3, 468ADSGoogle Scholar
  56. Wang J.-M., Chen Y.-M., Hu C., Mao W.-M., Zhang S., Bian W.-H. 2009, Astrophys. J. Lett., 705, L76ADSCrossRefGoogle Scholar
  57. Wilkinson P. N., Polatidis A. G., Readhead A. C. S., Xu W., Pearson T. J. 1994, ApJ, 432, L87ADSCrossRefGoogle Scholar
  58. Wizinowich P., Acton D. S., Shelton C. et al. 2000, PASP, 112, 315ADSCrossRefGoogle Scholar
  59. Wright E. L., Eisenhardt P. R. M., Mainzer A. K. et al. 2010, AJ, 140, 1868ADSCrossRefGoogle Scholar
  60. Woo J.-H., Cho H., Husemann B. et al. 2014, MNRAS, 437, 32ADSCrossRefGoogle Scholar
  61. Zhou H., Wang T., Zhang X., Dong X., Li C. 2004, Astrophys. J. Lett., 604, L33ADSCrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Indian Institute of AstrophysicsBangaloreIndia
  2. 2.Pondicherry UniversityKalapetIndia
  3. 3.National Centre for Radio AstrophysicsTata Institute of Fundamental ResearchPuneIndia

Personalised recommendations