Advertisement

Solar Physics

, 294:40 | Cite as

Association of Calcium Network Bright Points with Underneath Photospheric Magnetic Patches

  • Nancy Narang
  • Dipankar BanerjeeEmail author
  • Kalugodu Chandrashekhar
  • Vaibhav Pant
Article

Abstract

Recent dedicated Hinode polar region campaigns revealed the presence of concentrated kilogauss patches of the magnetic field in the polar regions of the Sun, which are also shown to be correlated with facular bright points at the photospheric level. In this work, we demonstrate that this spatial intermittency of the magnetic field persists even up to the chromospheric heights. The small-scale bright elements visible in the bright network lanes of the solar network structure as seen in the Ca ii H images are termed network bright points. We use special Hinode campaigns devoted to the observation of polar regions of the Sun to study the polar network bright points during the phase of the last extended solar minimum. We use Ca ii H images of chromosphere observed by the Solar Optical Telescope. For magnetic field information, level-2 data of the spectro-polarimeter is used. We observe a considerable association between the polar network bright points and magnetic field concentrations. The intensity of such bright points is found to be correlated well with the photospheric magnetic field strength underneath with a linear relation existing between them.

Keywords

Sun: polar regions Chromosphere Photosphere Magnetic fields Network structure Supergranulation 

Notes

Acknowledgements

Hinode is a Japanese mission developed and launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC (UK) as international partners. It is operated by these agencies in cooperation with ESA and NSC (Norway). N. Narang acknowledges the Human Resource Development Group (HRDG) of Council of Scientific and Industrial Research (CSIR), India, for awarding Senior Research Fellowship (SRF). V. Pant is supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme. The authors would like to thank the anonymous referee for detailed comments, which led to the improvement of the manuscript.

Disclosure of Potential Conflicts of Interest

The authors declare that they have no conflicts of interest.

References

  1. Egamberdiev, S.A.: 1983, Sov. Astron. Lett. 9, 385. ADS. ADSGoogle Scholar
  2. Frazier, E.N.: 1970, Solar Phys. 14, 89. DOI. ADS. ADSCrossRefGoogle Scholar
  3. Gabriel, A.H.: 1976, Phil. Trans. Roy. Soc. London Ser. A 281, 339. DOI. ADS. ADSCrossRefGoogle Scholar
  4. Habbal, S.R., Withbroe, G.L., Dowdy, J.F. Jr.: 1990, Astrophys. J. 352, 333. DOI. ADS. ADSCrossRefGoogle Scholar
  5. Harvey, K.L.: 1985, Aust. J. Phys. 38, 875. ADS. ADSCrossRefGoogle Scholar
  6. Harvey, K.L., Martin, S.F.: 1973, Solar Phys. 32, 389. DOI. ADS. ADSCrossRefGoogle Scholar
  7. Harvey, K.L., White, O.R.: 1999, Astrophys. J. 515, 812. DOI. ADS. ADSCrossRefGoogle Scholar
  8. Ito, H., Tsuneta, S., Shiota, D., Tokumaru, M., Fujiki, K.: 2010, Astrophys. J. 719, 131. DOI. ADS. ADSCrossRefGoogle Scholar
  9. Kaithakkal, A.J., Suematsu, Y., Kubo, M., Shiota, D., Tsuneta, S.: 2013, Astrophys. J. 776, 122. DOI. ADS. ADSCrossRefGoogle Scholar
  10. Kosugi, T., Matsuzaki, K., Sakao, T., Shimizu, T., Sone, Y., Tachikawa, S., Hashimoto, T., Minesugi, K., Ohnishi, A., Yamada, T., Tsuneta, S., Hara, H., Ichimoto, K., Suematsu, Y., Shimojo, M., Watanabe, T., Shimada, S., Davis, J.M., Hill, L.D., Owens, J.K., Title, A.M., Culhane, J.L., Harra, L.K., Doschek, G.A., Golub, L.: 2007, Solar Phys. 243, 3. DOI. ADS. ADSCrossRefGoogle Scholar
  11. Lites, B.W., Kubo, M., Socas-Navarro, H., Berger, T., Frank, Z., Shine, R., Tarbell, T., Title, A., Ichimoto, K., Katsukawa, Y., Tsuneta, S., Suematsu, Y., Shimizu, T., Nagata, S.: 2008, Astrophys. J. 672, 1237. DOI. ADS. ADSCrossRefGoogle Scholar
  12. Loukitcheva, M., Solanki, S.K., White, S.M.: 2009, Astron. Astrophys. 497, 273. DOI. ADS. ADSCrossRefGoogle Scholar
  13. Nindos, A., Zirin, H.: 1998, Solar Phys. 179, 253. DOI. ADS. ADSCrossRefGoogle Scholar
  14. Parker, E.N.: 1978, Astrophys. J. 221, 368. DOI. ADS. ADSCrossRefGoogle Scholar
  15. Pastor Yabar, A., Martínez González, M.J., Collados, M.: 2018, Astron. Astrophys. 616, A46. DOI. ADS. ADSCrossRefGoogle Scholar
  16. Rezaei, R., Schlichenmaier, R., Beck, C.A.R., Bruls, J.H.M.J., Schmidt, W.: 2007, Astron. Astrophys. 466, 1131. DOI. ADS. ADSCrossRefGoogle Scholar
  17. Rieutord, M., Rincon, F.: 2010, Living Rev. Solar Phys. 7, 2. DOI. ADS. ADSCrossRefGoogle Scholar
  18. Schrijver, C.J.: 1993, Astron. Astrophys. 269, 395. ADS. ADSGoogle Scholar
  19. Schrijver, C.J.: 2001, In: Garcia Lopez, R.J., Rebolo, R., Zapaterio Osorio, M.R. (eds.) 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, Astronomical Society of the Pacific Conference Series 223, 131. ADS. Google Scholar
  20. Schrijver, C.J., Dobson, A.K., Radick, R.R.: 1989, Astrophys. J. 341, 1035. DOI. ADS. ADSCrossRefGoogle Scholar
  21. Schrijver, C.J., Cote, J., Zwaan, C., Saar, S.H.: 1989, Astrophys. J. 337, 964. DOI. ADS. ADSCrossRefGoogle Scholar
  22. Sheeley N.R. Jr., Cooper, T.J., Anderson, J.R.L.: 2011, Astrophys. J. 730, 51. DOI. ADS. ADSCrossRefGoogle Scholar
  23. Simon, G.W., Leighton, R.B.: 1964, Astrophys. J. 140, 1120. DOI. ADS. ADSCrossRefGoogle Scholar
  24. Skumanich, A., Smythe, C., Frazier, E.N.: 1975, Astrophys. J. 200, 747. DOI. ADS. ADSCrossRefGoogle Scholar
  25. Solanki, S.K., Steiner, O., Uitenbroeck, H.: 1991, Astron. Astrophys. 250, 220. ADS. ADSGoogle Scholar
  26. Thompson, W.T.: 2006, Astron. Astrophys. 449, 791. DOI. ADS. ADSCrossRefGoogle Scholar
  27. Tsuneta, S., Ichimoto, K., Katsukawa, Y., Lites, B.W., Matsuzaki, K., Nagata, S., Orozco Suárez, D., Shimizu, T., Shimojo, M., Shine, R.A., Suematsu, Y., Suzuki, T.K., Tarbell, T.D., Title, A.M.: 2008a, Astrophys. J. 688, 1374. DOI. ADS. ADSCrossRefGoogle Scholar
  28. Tsuneta, S., Ichimoto, K., Katsukawa, Y., Nagata, S., Otsubo, M., Shimizu, T., Suematsu, Y., Nakagiri, M., Noguchi, M., Tarbell, T., Title, A., Shine, R., Rosenberg, W., Hoffmann, C., Jurcevich, B., Kushner, G., Levay, M., Lites, B., Elmore, D., Matsushita, T., Kawaguchi, N., Saito, H., Mikami, I., Hill, L.D., Owens, J.K.: 2008b, Solar Phys. 249, 167. DOI. ADS. ADSCrossRefGoogle Scholar
  29. Webb, D.F., Martin, S.F., Moses, D., Harvey, J.W.: 1993, Solar Phys. 144, 15. DOI. ADS. ADSCrossRefGoogle Scholar
  30. Wedemeyer-Böhm, S., Lagg, A., Nordlund, Å.: 2009, Space Sci. Rev. 144, 317. DOI. ADS. ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  • Nancy Narang
    • 1
  • Dipankar Banerjee
    • 1
    • 2
    Email author
  • Kalugodu Chandrashekhar
    • 1
  • Vaibhav Pant
    • 3
  1. 1.Indian Institute of AstrophysicsBangaloreIndia
  2. 2.Center of Excellence in Space SciencesIISERKolkataIndia
  3. 3.Centre for Mathematical Plasma Astrophysics, Mathematics DepartmentKU LeuvenLeuvenBelgium

Personalised recommendations