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Mid-infrared variability of blazars: a view from NEOWISE survey

  • Lisheng Mao
  • Xuemei Zhang
  • Tingfeng Yi
Original Article
  • 67 Downloads

Abstract

We studied mid-infrared (MIR) variability of a large sample of blazars detected by LAT/Fermi (called Fermi-detected blazars) and those not detected by LAT/Fermi (called non-Fermi-detected blazars) in order to investigate any difference in the variability characteristics between them as well as between FSRQs and BL Lacs. Making use of NEOWISE archival data from October 2013 to December 2017, we constructed the long-term 3.4 μm and 4.6 μm light curves of 2,573 blazars and computed their intrinsic variability amplitudes, \(\varPsi \). As a result, we found that (1) Fermi-detected blazars show higher \(\varPsi \) than non-Fermi-detected blazars; (2) Fermi-detected FSRQs show higher \(\varPsi \) than non-Fermi-detected FSRQs; (3) Fermi-detected BL Lacs show higher \(\varPsi \) than non-Fermi-detected BL Lacs; (4) FSRQs show higher \(\varPsi \) than BL Lacs. By comparing their distributions of “\(\mathit{var}\_\mathit{flg}\)” in the ALLWISE database, we also found that Fermi-detected blazars/FSRQs/BL Lacs tend to be more variable than non-Fermi-detected blazars/FSRQs/BL Lacs. For the Fermi-detected blazars, there are highly significant correlations between the flux densities and spectral indices in the MIR and gamma-ray bands. These results imply that the activity in the two bands is connected. Our results are consistent with several earlier results on the differences between Fermi-detected blazars and non-Fermi-detected blazars. We also give some possible explanations about the statistical results.

Keywords

BL Lacertae objects: general Galaxies: quasars Galaxies: photometry Infrared: galaxies Methods: data analysis 

Notes

Acknowledgements

We are grateful to the anonymous referee for insightful comments and constructive suggestions which improved the quality of this work. This research makes use of data products from the WISE/NEOWISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the NASA. This research also makes use of the NASA/IPAC Infrared Science Archive, which is operated by JPL/Caltech, under contract with NASA. Part of this work is based on archival data and online services provided by the Space Science Data Center-ASI. This work make use of R, which is a free software environment for statistical computing and graphics. This work is supported by Doctoral Natural Science Foundation of Yunnan Normal University and National Natural Science Foundation of China (grant No. 11463001).

References

  1. Abdo, A.A., Ackermann, M., Ajello, M., et al.: Astrophys. J. 700, 597 (2009) ADSCrossRefGoogle Scholar
  2. Abdo, A.A., Ackermann, M., Agudo, I., et al.: Astrophys. J. 716, 30 (2010a) ADSCrossRefGoogle Scholar
  3. Abdo, A.A., Ackermann, M., Ajello, M., et al.: Astrophys. J. 722, 520 (2010b) ADSCrossRefGoogle Scholar
  4. Abdo, A.A., Ackermann, M., Ajello, M., et al.: Astrophys. J. 715, 429 (2010c) ADSCrossRefGoogle Scholar
  5. Acero, F., Ackermann, M., Ajello, M., et al.: Astrophys. J. Suppl. Ser. 218, 23 (2015) ADSCrossRefGoogle Scholar
  6. Ackermann, M., Ajello, M., Allafort, A., et al.: Astrophys. J. 743, 171 (2011) ADSCrossRefGoogle Scholar
  7. Ackermann, M., Ajello, M., Allafort, A., et al.: Astrophys. J. Suppl. Ser. 209, 34 (2013) ADSCrossRefGoogle Scholar
  8. Ackermann, M., Ajello, M., Atwood, W.B., et al.: Astrophys. J. 810, 14 (2015) ADSCrossRefGoogle Scholar
  9. Ackermann, M., Anantua, R., Asano, K., et al.: Astrophys. J. Lett. 824, L20 (2016) ADSCrossRefGoogle Scholar
  10. Agarwal, A., Gupta, A.C., Bachev, R., et al.: Mon. Not. R. Astron. Soc. 451, 3882 (2015) ADSCrossRefGoogle Scholar
  11. Aharonian, F.A.: New Astron. 5, 377 (2000) ADSCrossRefGoogle Scholar
  12. Ai, Y.L., Yuan, W., Zhou, H.Y., et al.: Astrophys. J. Lett. 716, L31 (2010) ADSCrossRefGoogle Scholar
  13. Aller, M.F., Aller, H.D., Hughes, P.A.: Astrophys. J. 399, 16 (1992) ADSCrossRefGoogle Scholar
  14. Angelakis, E., Hovatta, T., Blinov, D., et al.: Mon. Not. R. Astron. Soc. 463, 3365 (2016) ADSCrossRefGoogle Scholar
  15. Bauer, A., Baltay, C., Coppi, P., et al.: Astrophys. J. 699, 1732 (2009) ADSCrossRefGoogle Scholar
  16. Blandford, R.D., Königl, A.: Astrophys. J. 232, 34 (1979) ADSCrossRefGoogle Scholar
  17. Böttcher, M., Reimer, A., Sweeney, K., Prakash, A.: Astrophys. J. 768, 54 (2013) ADSCrossRefGoogle Scholar
  18. Chatterjee, R., Bailyn, C.D., Bonning, E.W., et al.: Astrophys. J. 749, 191 (2012) ADSCrossRefGoogle Scholar
  19. Ciaramella, A., Bongardo, C., Aller, H.D., et al.: Astron. Astrophys. 419, 485 (2004) ADSCrossRefGoogle Scholar
  20. Cutri, R.M., Wright, E.L., Conrow, T., et al.: Explanatory Supplement to the WISE All-Sky Data Release Products (2012) Google Scholar
  21. D’Abrusco, R., Massaro, F., Ajello, M., et al.: Astrophys. J. 748, 68 (2012) ADSCrossRefGoogle Scholar
  22. Dou, L., Wang, T., Yan, L., et al.: Astrophys. J. Lett. 841, L8 (2017) ADSCrossRefGoogle Scholar
  23. Edelson, R., Turner, T.J., Pounds, K., et al.: Astrophys. J. 568, 610 (2002) ADSCrossRefGoogle Scholar
  24. Fan, J.H., Xie, G.Z., Pecontal, E., Pecontal, A., Copin, Y.: Astrophys. J. 507, 173 (1998) ADSCrossRefGoogle Scholar
  25. Gliozzi, M., Sambruna, R.M., Jung, I., et al.: Astrophys. J. 646, 61 (2006) ADSCrossRefGoogle Scholar
  26. Gupta, A.C., Cha, S.-M., Lee, S., et al.: Astron. J. 136, 2359 (2008a) ADSCrossRefGoogle Scholar
  27. Gupta, A.C., Fan, J.H., Bai, J.M., Wagner, S.J.: Astron. J. 135, 1384 (2008b) ADSCrossRefGoogle Scholar
  28. Hoffman, D.I., Cutri, R.M., Masci, F.J., et al.: Astron. J. 143, 118 (2012) ADSCrossRefGoogle Scholar
  29. Hovatta, T., Pavlidou, V., King, O.G., et al.: Mon. Not. R. Astron. Soc. 439, 690 (2014) ADSCrossRefGoogle Scholar
  30. Jiang, N., Dou, L., Wang, T., et al.: Astrophys. J. Lett. 828, L14 (2016) ADSCrossRefGoogle Scholar
  31. Kataoka, J., Takahashi, T., Wagner, S.J., et al.: Astrophys. J. 560, 659 (2001) ADSCrossRefGoogle Scholar
  32. Kovalev, Y.Y., Aller, H.D., Aller, M.F., et al.: Astrophys. J. Lett. 696, L17 (2009) ADSCrossRefGoogle Scholar
  33. Linford, J.D., Taylor, G.B., Romani, R.W., et al.: Astrophys. J. 726, 16 (2011) ADSCrossRefGoogle Scholar
  34. Lister, M.L., Homan, D.C., Kadler, M., et al.: Astrophys. J. Lett. 696, L22 (2009) ADSCrossRefGoogle Scholar
  35. Lister, M.L., Aller, M.F., Aller, H.D., et al.: Astrophys. J. Lett. 810, L9 (2015) ADSCrossRefGoogle Scholar
  36. Mainzer, A., Bauer, J., Grav, T., et al.: Astrophys. J. 731, 53 (2011) ADSCrossRefGoogle Scholar
  37. Mainzer, A., Bauer, J., Cutri, R.M., et al.: Astrophys. J. 792, 30 (2014) ADSCrossRefGoogle Scholar
  38. Mao, L., Zhang, X.: Astrophys. Space Sci. 361, 345 (2016) ADSCrossRefGoogle Scholar
  39. Massaro, F., D’Abrusco, R.: Astrophys. J. 827, 67 (2016) ADSCrossRefGoogle Scholar
  40. Massaro, E., Giommi, P., Leto, C., et al.: Astron. Astrophys. 495, 691 (2009) ADSCrossRefGoogle Scholar
  41. Massaro, E., Maselli, A., Leto, C., et al.: Astrophys. Space Sci. 357, 75 (2015) ADSCrossRefGoogle Scholar
  42. Meisner, A.M., Lang, D., Schlegel, D.J.: Astron. J. 154, 161 (2017a) ADSCrossRefGoogle Scholar
  43. Meisner, A.M., Lang, D., Schlegel, D.J.: (2017b). arXiv:1710.02526
  44. Meisner, A.M., Lang, D., Schlegel, D.J.: Astron. J. 153, 38 (2017c) ADSCrossRefGoogle Scholar
  45. Meisner, A.M., Lang, D., Schlegel, D.J.: Res. Notes Am. Astron. Soc. 2, 1 (2018) CrossRefGoogle Scholar
  46. Netzer, H.: Annu. Rev. Astron. Astrophys. 53, 365 (2015) ADSCrossRefGoogle Scholar
  47. Piner, B.G., Pushkarev, A.B., Kovalev, Y.Y., et al.: Astrophys. J. 758, 84 (2012) ADSCrossRefGoogle Scholar
  48. Pushkarev, A.B., Kovalev, Y.Y.: Astron. Astrophys. 544, A34 (2012) ADSCrossRefGoogle Scholar
  49. Raiteri, C.M., Villata, M., Aller, H.D., et al.: Astron. Astrophys. 377, 396 (2001) ADSCrossRefGoogle Scholar
  50. Raiteri, C.M., Villata, M., Kadler, M., et al.: Astron. Astrophys. 459, 731 (2006) ADSCrossRefGoogle Scholar
  51. Rakshit, S., Stalin, C.S.: Astrophys. J. 842, 96 (2017) ADSCrossRefGoogle Scholar
  52. Rani, B., Krichbaum, T.P., Fuhrmann, L., et al.: Astron. Astrophys. 552, A11 (2013) CrossRefGoogle Scholar
  53. Richards, J.L., Max-Moerbeck, W., Pavlidou, V., et al.: Astrophys. J. Suppl. Ser. 194, 29 (2011) ADSCrossRefGoogle Scholar
  54. Rodríguez-Pascual, P.M., Alloin, D., Clavel, J., et al.: Astrophys. J. Suppl. Ser. 110, 9 (1997) ADSCrossRefGoogle Scholar
  55. Romero, G.E., Combi, J.A., Colomb, F.R.: Astron. Astrophys. 288, 731 (1994) ADSGoogle Scholar
  56. Schneider, A.C., Greco, J., Cushing, M.C., et al.: Astrophys. J. 817, 112 (2016) ADSCrossRefGoogle Scholar
  57. Sesar, B., Ivezić, Ž., Lupton, R.H., et al.: Astron. J. 134, 2236 (2007) ADSCrossRefGoogle Scholar
  58. Sheng, Z., Wang, T., Jiang, N., et al.: Astrophys. J. Lett. 846, L7 (2017) ADSCrossRefGoogle Scholar
  59. Soldi, S., Türler, M., Paltani, S., et al.: Astron. Astrophys. 486, 411 (2008) ADSCrossRefGoogle Scholar
  60. Tanihata, C., Urry, C.M., Takahashi, T., et al.: Astrophys. J. 563, 569 (2001) ADSCrossRefGoogle Scholar
  61. Ulrich, M.-H., Maraschi, L., Urry, C.M.: Annu. Rev. Astron. Astrophys. 35, 445 (1997) ADSCrossRefGoogle Scholar
  62. Urry, C.M., Padovani, P.: Publ. Astron. Soc. Pac. 107, 803 (1995) ADSCrossRefGoogle Scholar
  63. Wright, E.L., Eisenhardt, P.R.M., Mainzer, A.K., et al.: Astron. J. 140, 1868–1881 (2010) ADSCrossRefGoogle Scholar
  64. Wright, E.L., Mainzer, A., Kirkpatrick, J.D., et al.: Astron. J. 148, 82 (2014) ADSCrossRefGoogle Scholar
  65. Wu, Z., Jiang, D., Gu, M., Chen, L.: Astron. Astrophys. 562, A64 (2014) ADSCrossRefGoogle Scholar
  66. Xie, G.Z., Zhou, S.B., Li, K.H., et al.: Mon. Not. R. Astron. Soc. 348, 831 (2004) ADSCrossRefGoogle Scholar
  67. Xiong, D., Zhang, X., Bai, J., Zhang, H.: Mon. Not. R. Astron. Soc. 450, 3568 (2015) ADSCrossRefGoogle Scholar
  68. Yang, Q., Wu, X.-B., Fan, X., et al.: (2017). arXiv:1711.08122
  69. Yang, H., Yuan, W., Yao, S., et al.: (2018). arXiv:1801.03963
  70. Zhang, Y.H., Celotti, A., Treves, A., et al.: Astrophys. J. 527, 719 (1999) ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Department of PhysicsYunnan Normal UniversityKunmingChina
  2. 2.Department of MathematicsYunnan Normal UniversityKunmingChina

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