Solar Physics

, Volume 279, Issue 2, pp 427–452

Propagating Disturbances in Coronal Loops: A Detailed Analysis of Propagation Speeds

  • G. Kiddie
  • I. De Moortel
  • G. Del Zanna
  • S. W. McIntosh
  • I. Whittaker
Article

Abstract

Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years. Although first interpreted as upflows (Schrijver et al., Solar Phys.187, 261, 1999), they have been widely regarded as slow magneto-acoustic waves, due to their observed velocities and periods. However, recent observations have questioned this interpretation, as periodic disturbances in Doppler velocity, line width, and profile asymmetry were found to be in phase with the intensity oscillations (De Pontieu and McIntosh, Astrophys. J.722, 1013, 2010; Tian, McIntosh, and De Pontieu, Astrophys. J. Lett.727, L37, 2011), suggesting that the disturbances could be quasi-periodic upflows. Here we conduct a detailed analysis of the velocities of these disturbances across several wavelengths using the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). We analysed 41 examples, including both sunspot and non-sunspot regions of the Sun. We found that the velocities of propagating disturbances (PDs) located at sunspots are more likely to be temperature dependent, whereas the velocities of PDs at non-sunspot locations do not show a clear temperature dependence. This suggests an interpretation in terms of slow magneto-acoustic waves in sunspots but the nature of PDs in non-sunspot (plage) regions remains unclear. We also considered on what scale the underlying driver is affecting the properties of the PDs. Finally, we found that removing the contribution due to the cooler ions in the 193 Å wavelength suggests that a substantial part of the 193 Å emission of sunspot PDs can be attributed to the cool component of 193 Å.

Keywords

Oscillations Corona Waves Flows Velocities 

References

  1. Banerjee, D., Gupta, G.R., Teriaca, L.: 2011, Space Sci. Rev. 158, 267. ADSCrossRefGoogle Scholar
  2. Banerjee, D., Teriaca, L., Gupta, G.R., Imada, S., Stenborg, G., Solanki, S.K.: 2009, Astron. Astrophys. 499, L29. ADSCrossRefGoogle Scholar
  3. Berghams, D., Clette, F.: 1999, Solar Phys. 186, 207. ADS: http://adsabs.harvard.edu/abs/1999SoPh..186..207B, doi:10.1023/A:1005189508371. ADSCrossRefGoogle Scholar
  4. Berghams, D., McKenzie, D., Clette, F.: 2001, Astron. Astrophys. 369, 291. ADSCrossRefGoogle Scholar
  5. Brooks, D.H., Warren, H.P.: 2011, Astrophys. J. Lett. 501, L217. Google Scholar
  6. Bryans, P., Young, P.R., Doschek, G.A.: 2010, Astrophys. J. 705, 1012. ADSCrossRefGoogle Scholar
  7. De Moortel, I.: 2009, Space Sci. Rev. 149, 65. ADSCrossRefGoogle Scholar
  8. De Moortel, I., Hood, A.W.: 2004, Astron. Astrophys. 415, 705. ADSCrossRefGoogle Scholar
  9. De Moortel, I., Ireland, J., Walsh, R.W.: 2000, Astron. Astrophys. 355, L23. ADSGoogle Scholar
  10. De Moortel, I., Rosner, R.: 2007, Solar Phys. 246, 53 ADS: http://adsabs.harvard.edu/abs/2007SoPh..246...53M, doi:10.1007/s11207-007-0392-6. ADSCrossRefGoogle Scholar
  11. De Moortel, I., Hood, A.W., Gerrard, C.L., Brooks, S.J.: 2004, Astron. Astrophys. 425, 741. ADSCrossRefGoogle Scholar
  12. De Pontieu, B., Erdélyi, R., De Moortel, I.: 2005, Astrophys. J. Lett. 624, L61. ADSCrossRefGoogle Scholar
  13. De Pontieu, B., McIntosh, S.W.: 2010, Astrophys. J. 722, 1013. ADSCrossRefGoogle Scholar
  14. De Pontieu, B., McIntosh, S.W., Hansteen, V.H., Schrijver, C.J.: 2009, Astrophys. J. Lett. 701, L1. ADSCrossRefGoogle Scholar
  15. De Pontieu, B., McIntosh, S.W., Carlsson, M., Hansteen, V.H., Tarbell, T.D., Boerner, P.: 2011, Science 331, 55. ADSCrossRefGoogle Scholar
  16. Deforest, C.E., Gurman, J.B.: 1998, Astrophys. J. Lett. 501, L217. ADSCrossRefGoogle Scholar
  17. Del Zanna, G.: 2008, Astron. Astrophys. 481, L49. ADSCrossRefGoogle Scholar
  18. Del Zanna, G., Mason, H.E.: 2003, Astron. Astrophys. 406, 1089. ADSCrossRefGoogle Scholar
  19. Del Zanna, G., O’Dwyer, B., Mason, H.E.: 2011, Astron. Astrophys. 535, A46. CrossRefGoogle Scholar
  20. Dere, K.P., Landi, E., Young, P.R., Del Zanna, G., Landini, M., Mason, H.E.: 2009, Astron. Astrophys. 498, 915. ADSCrossRefGoogle Scholar
  21. Doschek, G.A., Mariska, J.T., Warren, H.P., Brown, C.M., Culhane, J.L., Hara, H., et al.: 2007, Astrophys. J. Lett. 607, L109. ADSCrossRefGoogle Scholar
  22. Hara, H., Watanabe, T., Harra, L.K., Culhane, J.L., Young, P.R., Mariska, J.T., Doschek, G.A.: 2008, Astrophys. J. Lett. 678, L67. ADSCrossRefGoogle Scholar
  23. Harra, L.K., Sakao, T., Mandrini, C.H., Hara, H., Imada, S., Young, P.R., van Driel-Gesztelyi, L., Baker, D.: 2008, Astrophys. J. Lett. 677, L159. ADSCrossRefGoogle Scholar
  24. He, J.S., Marsch, E., Tu, C.Y., Guo, L.J., Tian, H.: 2010, Astron. Astrophys. 516, A14. ADSCrossRefGoogle Scholar
  25. Kamio, S., Peter, H., Curdt, W., Solanki, S.K.: 2011, Astron. Astrophys. 532, 96. ADSCrossRefGoogle Scholar
  26. Kitagawa, N., Yokoyama, T., Imada, S., Hara, H.: 2010, Astrophys. J. 721, 744. ADSCrossRefGoogle Scholar
  27. Krishna Prasad, S., Banerjee, D., Gupta, G.R.: 2011, Astron. Astrophys. 528, L4. ADSCrossRefGoogle Scholar
  28. Landi, E., Del Zanna, G., Young, P.R., Dere, K.P., Mason, H.E.: 2012, Astrophys. J. 744, 99. ADSCrossRefGoogle Scholar
  29. Malins, C., Erdélyi, R.: 2007, Solar Phys. 246, 41. ADS: http://adsabs.harvard.edu/abs/2007SoPh..246...41M, doi:10.1007/s11207-007-9073-8. ADSCrossRefGoogle Scholar
  30. Mariska, J.T., Muglach, K.: 2009, Astrophys. J. 713, 573. ADSCrossRefGoogle Scholar
  31. Marsch, E., Tian, H., Sun, J., Curdt, W., Wiegelmann, T.: 2008, Astrophys. J. 685, 1262. ADSCrossRefGoogle Scholar
  32. Marsh, M.S., Walsh, R.W.: 2009, Astrophys. J. Lett. 706, L76. ADSCrossRefGoogle Scholar
  33. Marsh, M.S., Walsh, R.W., Plunkett, S.: 2009, Astrophys. J. 697, 1674. ADSCrossRefGoogle Scholar
  34. McEwan, M.P., De Moortel, I.: 2006, Astron. Astrophys. 448, 763. ADSCrossRefGoogle Scholar
  35. McIntosh, S.W., Innes, D.E., De Pontieu, B., Leamon, R.J.: 2010, Astron. Astrophys. 510, L2. ADSCrossRefGoogle Scholar
  36. McIntosh, S.W., Tian, H., Sechler, M., De Pontieu, B.: 2012, Astrophys. J. 749, 60. ADSCrossRefGoogle Scholar
  37. Murray, M.J., Baker, D., van Driel-Gesztelyi, L., Sun, J.: 2010, Solar Phys. 261, 253. ADS: http://adsabs.harvard.edu/abs/2010SoPh..261..253M, doi:10.1007/s11207-009-9484-9. ADSCrossRefGoogle Scholar
  38. Nakariakov, V.M., Verwichte, E., Berghams, D., Robbrecht, E.: 2000, Astron. Astrophys. 362, 1151. ADSGoogle Scholar
  39. Nightingale, R.W., Aschwanden, M.J., Hurbert, N.E.: 1999, Solar Phys. 190, 249. ADS: http://adsabs.harvard.edu/abs/1999SoPh..190..249N, doi:10.1023/A:1005211618498. ADSCrossRefGoogle Scholar
  40. Nishizuka, N., Hara, H.: 2011, Astrophys. J. Lett. 737, L43. ADSCrossRefGoogle Scholar
  41. O’Dwyer, B., Del Zanna, G., Mason, H.E., Weber, M.A., Tripathi, D.: 2010, Astron. Astrophys. 521, A21. CrossRefGoogle Scholar
  42. Ofman, L., Romoli, M., Davila, J.M., Poletto, G., Kohl, J., Noci, G.: 1997, In: Wilson, A. (ed.) Fifth SOHO Workshop: The Corona and Solar Wind Near Minimum Activity SP-404, ESA, Noordwijk, 571. Google Scholar
  43. Peter, H.: 2010, Astron. Astrophys. 521, A51. ADSCrossRefGoogle Scholar
  44. Rouppe van der Voort, L., Leenaarts, J., De Pontieu, B., Carlsson, M., Vissers, G.: 2009, Astron. Astrophys. 705, 272. Google Scholar
  45. Sakao, T., Kano, R., Narukage, N., Kotoku, J., Bando, T., De Luca, E.E.: 2007, Science 318, 1585. ADSCrossRefGoogle Scholar
  46. Schrijver, C.J., Title, A.M., Berger, T.E., Fletcher, L., Hurlbert, N.E., Nightingale, R.: 1999, Solar Phys. 187, 261. ADS: http://adsabs.harvard.edu/abs/1999SoPh..187..261S, doi:10.1023/A:1005194519642. ADSCrossRefGoogle Scholar
  47. Tian, H., McIntosh, S.W., De Pontieu, B.: 2011, Astrophys. J. Lett. 727, L37. ADSCrossRefGoogle Scholar
  48. Tian, H., McIntosh, S.W., De Pontieu, B., Martínez-Sykora, J., Sechler, M., Wang, X.: 2011a, Astrophys. J. 738, 18. ADSCrossRefGoogle Scholar
  49. Tian, H., McIntosh, S.W., Rifal Habbal, S., He, J.: 2011b, Astrophys. J. 736, 130. ADSCrossRefGoogle Scholar
  50. Torrence, C., Compo, G.P.: 2008, Bull. Am. Meteorol. Soc. 79, 61. CrossRefGoogle Scholar
  51. Tripathi, D., Mason, H.E., Dwivedi, B.N., Del Zanna, G., Young, P.R.: 2009, Astrophys. J. 694, 1256. ADSCrossRefGoogle Scholar
  52. Tsiklauri, D., Nakariakov, V.M.: 2001, Astron. Astrophys. 379, 1106. ADSCrossRefGoogle Scholar
  53. Ugarte-Urra, I., Warren, H.P.: 2011, Astrophys. J. 730, 37. ADSCrossRefGoogle Scholar
  54. Verwichte, E., Marsh, M., Foullon, C., Van Doorsselaere, T., De Moortel, I., Hood, A.W., Nakariakov, V.M.: 2010, Astrophys. J. Lett. 724, L194. ADSCrossRefGoogle Scholar
  55. Wang, T.J., Ofman, L., Davila, J.M.: 2009, In: Lites, B., Cheung, M., Magara, T., Mariska, J., Reeves, K. (eds.) The Second Hinode Science Meeting: Beyond Discovery – Toward Understanding, Boulder, Colorado 415, 28. Google Scholar
  56. Warren, H.P., Ugarte-Urra, I., Young, P.R., Stenborg, G.: 2011, Astrophys. J. 727, 58. ADSCrossRefGoogle Scholar
  57. Young, P.R., O’Dwyer, B., Mason, H.E.: 2012, Astrophys. J. 744, 14. ADSCrossRefGoogle Scholar
  58. Yuan, D., Nakariakov, V.: 2012, Astron. Astrophys. 543, A9. ADS: http://adsabs.harvard.edu/abs/2012A&A...543A...9Y, doi:10.1051/0004-6361/201218848. ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • G. Kiddie
    • 1
  • I. De Moortel
    • 1
  • G. Del Zanna
    • 2
  • S. W. McIntosh
    • 3
  • I. Whittaker
    • 1
  1. 1.School of Mathematics and StatisticsUniversity of St AndrewsSt AndrewsScotland, UK
  2. 2.Department of Applied Mathematics and Theoretical PhysicsUniversity of CambridgeCambridgeUK
  3. 3.High Altitude ObservatoryNational Center for Atmospheric ResearchBoulderUSA

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