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STUDY OF MILLI-JANSKY SEYFERT GALAXIES WITH STRONG FORBIDDEN HIGH-IONIZATION LINES USING THE VERY LARGE ARRAY SURVEY IMAGES

  • LAL, DHARAM V.
  • Received : 2015.11.30
  • Accepted : 2015.12.16
  • Published : 2015.12.31

Abstract

We study the radio properties at 1.4 GHz of Seyfert galaxies with strong forbidden highionization lines (FHILs), selected from the Sloan Digital Sky Survey - a large-sized sample containing nearly equal proportion of diverse range of Seyfert galaxies showing similar redshift distributions compiled by using the Very Large Array survey images. The radio detection rate is low, 49%, which is lower than the detection rate of several other known Seyfert galaxy samples. These galaxies show low star formation rates and the radio emission is dominated by the active nucleus with ≤10% contribution from thermal emission, and possibly, none show evidence for relativistic beaming. The radio detection rate, distributions of radio power, and correlations between radio power and line luminosities or X-ray luminosity for narrow-line Seyfert 1 (NLS1), Seyfert 1 and Seyfert 2 galaxies are consistent with the predictions of the unified scheme hypothesis. Using correlation between radio and [O III] λ 5007 Å luminosities, we show that ∼8% sample sources are radio-intermediate and the remaining are radio-quiet. There is possibly an ionization stratification associated with clouds on scales of 0.1-1.0 kpc, which have large optical depths at 1.4GHz, and it seems these clouds are responsible for free-free absorption of radio emission from the core; hence, leading to low radio detection rate for these FHIL-emitting Seyfert galaxies

Keywords

galaxies;active— galaxies;jets — galaxies;nuclei— galaxies;Seyfert— galaxies;structure— radio continuum;galaxies

References

  1. Alonso-Herrero, A., Pereira-Santaella, M., Rieke, G. H., Diamond-Stanic, A. M., Wang, Y., Hernán-Caballero, A., & Rigopoulou, D. 2013, Local Luminous Infrared Galaxies. III. Co-evolution of Black Hole Growth and Star Formation Activity?, ApJ, 765, 78 https://doi.org/10.1088/0004-637X/765/2/78
  2. Antonucci, R. R. J. 1993, Unified Models for Active Galactic Nuclei and Quasars, ARAA, 31, 473 https://doi.org/10.1146/annurev.aa.31.090193.002353
  3. Baum, S. A., & Heckman, T. 1989, Extended Optical Line Emitting Gas in Powerful Radio Galaxies - Statistical Properties and Physical Conditions, ApJ, 336, 681 https://doi.org/10.1086/167043
  4. Becker, R. H, White, R. L., Helfand, & D. J. 1995, The FIRST Survey: Faint Images of the Radio Sky at Twenty Centimeters, ApJ, 450, 559 https://doi.org/10.1086/176166
  5. Bell, E. F. 2003, Estimating Star Formation Rates from Infrared and Radio Luminosities: The Origin of the Radio-Infrared Correlation, ApJ, 586, 794 https://doi.org/10.1086/367829
  6. Boller, T. 2000, ROSAT Results on Narrow-Line Seyfert 1 Galaxies, New Astron. Rev., 44, 387 https://doi.org/10.1016/S1387-6473(00)00066-X
  7. Broderick, J. W., & Fender, R. P. 2011, Is There Really a Dichotomy in Active Galactic Nucleus Jet Power?, MNRAS, 417, 184 https://doi.org/10.1111/j.1365-2966.2011.19060.x
  8. Cappi, M., Panessa, F., Bassani, L., et al. 2006, X-Ray Spectral Survey with XMM-Newton of a Complete Sample of Nearby Seyfert Galaxies, A&A, 446, 459 https://doi.org/10.1051/0004-6361:20053893
  9. Colbert, E. J. M., Baum, S. A., Gallimore, J. F., O’Dea, C. P., & Christensen, J. A. 1996a, Large-Scale Outflows in Edge-on Seyfert Galaxies. II. Kiloparsec-Scale Radio Continuum Emission, ApJ, 467, 551 https://doi.org/10.1086/177633
  10. Colbert, E. J. M., Baum, S. A., Gallimore, J. F., O’Dea, C. P., Lehnert, M. D., Tsvetanov, Z. I., Mulchaey, J. S., & Caganoff, S. 1996b, Large-Scale Outflows in Edge-on Seyfert Galaxies. I. Optical Emission-Line Imaging and Optical Spectroscopy, ApJS, 105, 75 https://doi.org/10.1086/192307
  11. Condon, J. J., Cotton, W. D., Greisen, E. W., Yin, Q. F., Perley, R. A., Taylor, G. B., & Broderick, J. J. 1998, The NRAO VLA Sky Survey, AJ, 115, 1693 https://doi.org/10.1086/300337
  12. Dadina, M. 2008, Seyfert Galaxies in the Local Universe (z ≤0.1): the Average X-Ray Spectrum as Seen by BeppoSAX, A&A, 485, 417 https://doi.org/10.1051/0004-6361:20077569
  13. Deo, R. P., Crenshaw, D. M., Kraemer, S. B., Dietrich, M., Elitzur, M., Teplitz, H., & Turner, T. J. 2007, Spitzer IRS Observations of Seyfert 1.8 and 1.9 Galaxies: A Comparison with Seyfert 1 and Seyfert 2, ApJ, 671,124 https://doi.org/10.1086/522823
  14. De Robertis, M. M., Osterbrock, D. E., 1984, An Analysis of the Narrow-Line Profiles in High Ionization Seyfert Galaxies, ApJ, 286, 171 https://doi.org/10.1086/162585
  15. Erkens, U., Appenzeller, I., & Wagner, S. 1997, The Nature of the FHIL Winds from AGN, A&A, 323, 707
  16. Evans, I. N., Ford, H. C., Kinney, A. L., Antonucci, A. J., Armus, L., & Caganoff, S. 1991, HST Imaging of the Inner 3 arcseconds of NGC 1068 in the Light of Forbidden [O III] 5007Å, ApJ, 369, L27 https://doi.org/10.1086/185951
  17. Falcke, H., Sherwood, W., & Patnaik, A. R. 1996, The Nature of Radio-Intermediate Quasars: What Is Radio-Loud and What Is Radio-Quiet?, ApJ, 471, 106 https://doi.org/10.1086/177956
  18. Falcke, H., Wilson, A. S., & Simpson, C. 1998, Hubble Space Telescope and VLA Observations of Seyfert 2 Galaxies: The Relationship between Radio Ejecta and the Narrow-Line Region, ApJ, 502, 199 https://doi.org/10.1086/305886
  19. Gelbord, J. M., Mullaney, J. R., & Ward, M. J. 2009, AGN with Strong Forbidden High-Ionization Lines Selected from the Sloan Digital Sky Survey, MNRAS, 397, 172 (GMW09) https://doi.org/10.1111/j.1365-2966.2009.14961.x
  20. Giuricin, G., Mardirossian, F. Mezzetti, M., & Bertotti, G. 1990, The Radio Properties of Bright Seyfert Galaxies, ApJSS, 72, 551 https://doi.org/10.1086/191425
  21. Gu, Q., Melnick, J., Cid Fernandes, R., Kunth, D., Terlevich, E., & Terlevich, R. 2006, Emission-Line Properties of Seyfert 2 Nuclei, MNRAS, 366, 480 https://doi.org/10.1111/j.1365-2966.2005.09872.x
  22. Heckman, T.M., Ptak, A., Hornschemeier, A., & Kauffmann, G. 2005, The Relationship of Hard X-Ray and Optical Line Emission in Low-Redshift Active Galactic Nuclei, ApJ, 634, 161 https://doi.org/10.1086/491665
  23. Ho, L. C. 2005, [O II] Emission in Quasar Host Galaxies: Evidence for a Suppressed Star Formation Efficiency, ApJ, 629, 680 https://doi.org/10.1086/431643
  24. Ho, L. C. 2008, Nuclear Activity in Nearby Galaxies, ARAA, 46, 475 https://doi.org/10.1146/annurev.astro.45.051806.110546
  25. Ho, L. C., & Ulvestad, J. S. 2001, Radio Continuum Survey of an Optically Selected Sample of Nearby Seyfert Galaxies, ApJS, 133, 77 https://doi.org/10.1086/319185
  26. Huchra, J., & Burg, R. 1992, The Spatial Distribution of Active Galactic Nuclei. I - The Density of Seyfert Galaxies and Liners, ApJ, 393, 90 https://doi.org/10.1086/171488
  27. Hunt, L. K., & Malkan, M. A. 1999, Morphology of the 12 Micron Seyfert Galaxies. I. Hubble Types, Axial Ratios, Bars, and Rings, ApJ, 516, 660 https://doi.org/10.1086/307150
  28. Kellermann, K. I., & Owen, F. N. 1988, Radio Galaxies and Quasars, in Springer-Verlag, Galactic and Extragalactic Radio Astronomy, eds. G. L. Verschuur & K. I. Kellermann, 563
  29. Khachikian, E. Y., & Weedman, D. W. 1974, An Atlas of Seyfert Galaxies, ApJ, 192, 581 https://doi.org/10.1086/153093
  30. Kharb, P., Hota, A., Croston, J. H., Hardcastle, M. J., O’Dea, C. P., Kraft, R. P., Axon, D. J., & Robinson, A. 2010, Parsec-Scale Imaging of the Radio-Bubble Seyfert Galaxy NGC 6764, ApJ, 723, 580 https://doi.org/10.1088/0004-637X/723/1/580
  31. Komossa, S., Xu, D., Zhou, H., Storchi-Bergmann, T., & Binette, L. 2008, On the Nature of Seyfert Galaxies with High [O III] λ5007 Blueshifts, ApJ, 680, 926 https://doi.org/10.1086/587932
  32. Koski, A. T. 1978, Spectrophotometry of Seyfert 2 Galaxies and Narrow-Line Radio Galaxies, ApJ, 223, 56 https://doi.org/10.1086/156235
  33. Kruper, J. S., Canizares, C. R., & Urry, C. M. 1990, Soft X-Ray Properties of Seyfert Galaxies. I - Spectra, ApJS, 74, 347 https://doi.org/10.1086/191503
  34. Kukula, M. J., Pedlar, A., Baum, S. A., & O’Dea, C. P. 1995, High-Resolution Radio Observations of the CfA Seyfert Sample - I. The Observations, MNRAS, 276, 1262
  35. Laing, R., Riley, J. M., & Longair, M. S. 1983, Bright Radio Sources at 178 MHz - Flux Densities, Optical Identifications and the Cosmological Evolution of Powerful Radio Galaxies, MNRAS, 204, 151 https://doi.org/10.1093/mnras/204.1.151
  36. Lal, D. V., & Ho, L. C. 2010, The Radio Properties of Type 2 Quasars, AJ, 139, 1089 https://doi.org/10.1088/0004-6256/139/3/1089
  37. Lal, D. V., & Rao, A. P. 2007, Giant Metrewave Radio Telescope Observations of X-Shaped Radio Sources, MNRAS, 374, 1085 https://doi.org/10.1111/j.1365-2966.2006.11225.x
  38. Lal, D. V., Shastri, P., & Gabuzda, D. C. 2004, Milliarcsec-Scale Radio Structure of a Matched Sample of Seyfert 1 and Seyfert 2 Galaxies, A&A, 425, 99 https://doi.org/10.1051/0004-6361:20040486
  39. Lal, D. V., Shastri, P., & Gabuzda, D. C. 2011, Seyfert Galaxies: Nuclear Radio Structure and Unification, ApJ, 731, 68 https://doi.org/10.1088/0004-637X/731/1/68
  40. Liu, X., Zakamska, N. L., Greene, J. E., Strauss, M. A., Krolik, J. H., & Heckman, T. M. 2009, Host Galaxies of Luminous Type 2 Quasars at z ∼0.5, ApJ, 702, 1098 https://doi.org/10.1088/0004-637X/702/2/1098
  41. Mainieri, V., Rigopoulou, D., Lehmann, I., Scott, S., Matute, I., Almaini, O., Tozzi, P., Hasinger, G., & Dunlop, J. S. 2005, Submillimetre Detection of a High-Redshift Type 2 QSO, MNRAS, 356, 1571 https://doi.org/10.1111/j.1365-2966.2004.08600.x
  42. Martínez-Sansigre, A., Rawlings, S., Garn, T., Green, D. A., Alexander, P., Klöckner, H.-R., & Riley, J. M. 2006, A Population of High-Redshift Type 2 Quasars - II. Radio Properties, MNRAS, 373, L80 https://doi.org/10.1111/j.1745-3933.2006.00247.x
  43. Mas-Hesse, J. M., Rodriguez-Pascual, P. M., de Cordoba, L. S. F., & Mirabel, I. F. 1994, Multiwavelength Analysis of Quasars, Seyfert Galaxies, and Starbursts, ApJS, 92, 599 https://doi.org/10.1086/192022
  44. Mason, R. E., Lopez-Rodriguez E., Packham, C., et al. 2012, The Nuclear Infrared Emission of Lowluminosity Active Galactic Nuclei, AJ, 144, 11 https://doi.org/10.1088/0004-6256/144/1/11
  45. Miller, P., Rawlings, S., & Saunders, R. 1993, The Radio and Optical Properties of the z <0.5 BQS Quasars, MNRAS, 263, 425 https://doi.org/10.1093/mnras/263.2.425
  46. Murayama, T., & Taniguchi, Y. 1998, Where Is the Coronal Line Region in Active Galactic Nuclei?, ApJ, 497, L9 https://doi.org/10.1086/311264
  47. Mundell, C. G., Ferruit, P., Nagar, N., & Wilson, A. S. 2009, Radio Variability in Seyfert Nuclei, ApJ, 703, 802 https://doi.org/10.1088/0004-637X/703/1/802
  48. Nagao, T., Taniguchi, Y., & Murayama, T. 2000, High-Ionization Nuclear Emission-Line Region of Seyfert Galaxies, AJ, 119, 2605 https://doi.org/10.1086/301411
  49. Netzer, H. 2015, Revisiting the Unified Model of Active Galactic Nuclei, ARA&A, 53, 365 https://doi.org/10.1146/annurev-astro-082214-122302
  50. Norris, R. P., Roy, A. L., Allen, D. A., Kesteven, M. J., Truope, E. R., & Reynolds, J. E. 1992, Compact Radio Cores in Seyfert and Starburst Galaxies, in ASP Conf. Ser. 31, Relationships between Active Galactic Nuclei and Starburst Galaxies, ed. Alexie V. Filippenko, 71
  51. Osterbrock, D. E. 1981, Seyfert Galaxies with Weak Broad H alpha Emission Lines, ApJ, 249, 462 https://doi.org/10.1086/159306
  52. Osterbrock, D. E. 1991, Active Galactic Nuclei, Rep. Prog. Phys., 54, 579 https://doi.org/10.1088/0034-4885/54/4/002
  53. Osterbrock, D. E., & Pogge, R. W. 1985, The Spectra of Narrow-Line Seyfert 1 Galaxies, ApJ, 297, 166 https://doi.org/10.1086/163513
  54. Panessa, F., & Giroletti, M. 2013, Sub-Parsec Radio Cores in Nearby Seyfert Galaxies, MNRAS, 432, 1138 https://doi.org/10.1093/mnras/stt547
  55. Rawlings, S., & Saunders, R. 1991, Evidence for a Common Central-Engine Mechanism in All Extragalactic Radio Sources, Nature, 349, 138 https://doi.org/10.1038/349138a0
  56. Roy, A. L., Norris, R. P., Kesteven, M. J., Troup, E. R., & Reynolds, J. E. 1994, Compact Radio Cores in Seyfert Galaxies, ApJ, 432, 496 https://doi.org/10.1086/174589
  57. Rosario, D. J., Santini, P., Lutz, D., et al. 2012, The Mean Star Formation Rate of X-Ray Selected Active Galaxies and Its Evolution from z ∼2.5: Results from PEP-Herschel, A&A, 545, 45 https://doi.org/10.1051/0004-6361/201219258
  58. Rush, B., Malkan, M. A., & Spinoglio, L. 1993, The Extended 12 micron Galaxy Sample, ApJS, 89, 1 https://doi.org/10.1086/191837
  59. Schmitt, H. R., Antonucci, R. R. J., Ulvestad, J. S., Kinney, A. L., Clarke, C. J., & Pringle, J. E. 2001, Testing the Unified Model with an Infrared-Selected Sample of Seyfert Galaxies, ApJ, 555, 663 https://doi.org/10.1086/321505
  60. Siegel, S., & Castellan, Jr. N. J. 1981, Nonparametric Statistics for the Behavioral Sciences
  61. Singh, V., Shastri, P., Ishwara-Chandra, C. H., & Athreya, R. 2013, Low-Frequency Radio Observations of Seyfert Galaxies: A Test of the Unification Scheme, A&A, 554, 85 https://doi.org/10.1051/0004-6361/201221003
  62. Spergel, D. N., Verde, L., Peiris, H. V. E., et al. 2003, First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters, ApJS, 148, 175 https://doi.org/10.1086/377226
  63. Thean, A., Pedlar, A., Kukula, M. J., Baum, S. A., & O’Dea, C. P. 2000, High-Resolution Radio Observations of Seyfert Galaxies in the Extended 12-μm Sample - I. The Observations, MNRAS, 314, 573 https://doi.org/10.1046/j.1365-8711.2000.03401.x
  64. Thean, A., Pedlar, A., Kukula, M. J., Baum, S. A., & O’Dea, C. P. 2001, High-Resolution Radio Observations of Seyfert Galaxies in the Extended 12-μm Sample - II. The Properties of Compact Radio Components, MNRAS, 325, 737 https://doi.org/10.1046/j.1365-8711.2001.04485.x
  65. Ulvestad, J. S., & Ho, L. C. 2001, Statistical Properties of Radio Emission from the Palomar Seyfert Galaxies, ApJ, 558, 561 https://doi.org/10.1086/322307
  66. Ulvestad, J. S., & Wilson, A. S. 1984, Radio Structures of Seyfert Galaxies. V - A Flux-Limited Sample of Markarian Galaxies, ApJ, 278, 544 https://doi.org/10.1086/161821
  67. Ulvestad, J. S., Wilson, A. S., & Sramek, R. A. 1981, Radio Structures of Seyfert Galaxies. II, ApJ, 247, 419 https://doi.org/10.1086/159051
  68. Urry, C. M., & Padovani, P. 1995, Unified Schemes for Radio-Loud Active Galactic Nuclei, PASP, 107, 803 https://doi.org/10.1086/133630
  69. Veilleux, S. 1988, A Search for Variations of Forbidden Fe VII 6087-Å Lines and Forbidden Fe X 6375-Å Lines in High-Ionization Seyfert Galaxies, AJ, 95, 1695 https://doi.org/10.1086/114766
  70. Valencia-S. M., Zuther, J., Eckart, A., García-Marín, M., Iserlohe, C., & Wright, G. 2012, Is IRAS 01072+4954 a True-Seyfert 2?. Hints from Near-Infrared Integral Field Spectroscopy, A&A, 544, 129 https://doi.org/10.1051/0004-6361/201219226
  71. Vignali, C., Pozzi, F., Fritz, J., et al. 2009, The HELLAS2XMM Survey - XII. The Infrared/Submillimetre View of an X-Ray Selected Type 2 Quasar at z ∼2, MNRAS, 395, 2189 https://doi.org/10.1111/j.1365-2966.2009.14675.x
  72. Wang, J., Mao, Y. F., & Wei, J. Y. 2009, Accretion Properties of a Sample of Hard X-Ray (<60 keV) Selected Seyfert 1 Galaxies, AJ, 137, 3388 https://doi.org/10.1088/0004-6256/137/2/3388
  73. Whittle, M., Haniff, C. A., Ward, M. J., Meurs, E. J. A., Pedlar, A., Unger, S. W., Axon, D. J., & Harrison, B. A. 1986, Extended Forbidden O III Emission Associated with Nuclear Radio Lobes in the Seyfert Galaxy NGC 5929, MNRAS, 222, 186 https://doi.org/10.1093/mnras/222.2.189
  74. Xu, C., Livio, M., & Baum, S. A. 1999, Radio-Loud and Radio-Quiet Active Galactic Nuclei, AJ, 118, 1169 https://doi.org/10.1086/301007