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Latitudinal-Temporal Analysis of Long-Periodic Variations of Coronal Bright Points

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Abstract

The latitudinal-temporal changes in wavelet spectra for the number of coronal bright points (CBPs) in solar-activity (SA) cycles 23 and 24 are analyzed with the Morlet function. The number of CBPs at different latitudes is found to vary in different ways. The changes in the total number of CBPs show no noticeable relation with SA cycles. Conversely, the distribution of the spectral density of the CBP number at active and high latitudes and the equator, as well as the total CBP number, shows a pronounced agreement with the course of the SA cycle. An anticorrelation is observed for the high latitude zone.

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REFERENCES

  1. Chandrashekhar, K. and Sarkar, A., Modeling solar coronal bright-point oscillations with multiple nanoflare heated loops, Astrophys. J., 2015, vol. 810, no. 2, p. 163. https://doi.org/10.1088/0004-637X/810/2/163

  2. Clette, F., Hochedez, J.F., Newmark, J.S., et al., The radiometric calibration of the extreme ultraviolet imaging telescope, in The Radiometric Calibration of SOHO (ISSI Scientific Reports Series), Pauluhn, A., Huber, M.C.E., and von Steiger, R., Eds., Bern: ISSI, 2002, pp. 121–134.

    Google Scholar 

  3. Delaboudinière, J.P., Artzner, G.E., Gabriel, A.H., et al., EIT: Extreme-ultraviolet imaging telescope for the SOHO mission, Sol. Phys., 1995, vol. 162, nos. 1–2, pp. 291–312. https://doi.org/10.1007/BF00733432

    Article  Google Scholar 

  4. Egamberdiev, S.A., The placement of X-ray bright points relative to the chromospheric network, Sov. Astron. Lett., 1983, vol. 9, pp. 385–387.

    Google Scholar 

  5. Egamberdiev, Sh.A., Yakovkin, N.A., and Zel’dina, M.Yu., Helium ionization at bright X-ray points on the Sun, Izv. Akad. Nauk UzSSR, Fiz.–Mat. Nauki, 1983, no. 5, pp. 59–63.

  6. Feldman, U., Doschek, G.A., Schühle, U., and Wilhelm, K., Properties of quiet-Sun coronal plasmas at distances of 1.03 ≤ R solar ≤ 1.50 along the solar equatorial plane, Astrophys. J., 1999, vol. 518, no. 1, pp. 500-507. https://doi.org/10.1086/307252

    Article  Google Scholar 

  7. Golub, L., Krieger, A.S., Silk, J.K., et al., Solar X-ray bright points, Astrophys. J., 1974, vol. 189, pp. L93–L97. https://doi.org/10.1086/181472

    Article  Google Scholar 

  8. Habbal, S.R., Withbroe, G.L., and Dowdy, J.F., A comparison between bright points in a coronal hole and a quiet-Sun region, Astrophys. J., 1990, vol. 352, pp. 333–342. https://doi.org/10.1086/168540

    Article  Google Scholar 

  9. Krieger, A.S., Vaiana, G.S., and van Speybroeck, L.P., The X-ray corona and the photospheric magnetic field, in Solar Magnetic Fields (International Astronomical Union Symposium no. 43, Paris, France, August 31 to September 4, 1970), Howard, R.F., Ed., Dordrecht: Springer, 1971, pp. 397–412.

  10. Madjarska, M.S., Doyle, J.G., Teriaca, L., and Banerjee, D., An EUV bright point as seen by SUMER, CDS, MDI and EIT on-board SOHO, Astron. Astrophys., 2003, vol. 398, pp. 775–784. https://doi.org/10.1051/0004-6361:20021732

    Article  Google Scholar 

  11. Sattarov, I., Pevtsov, A., Karachik, N., and Sattarova, B.J., Large-scale structures in distribution of coronal bright points, in Large-Scale Structures and Their Role in Solar Activity (ASP Conference Series), 2005, vol. 346, pp. 363–368.

  12. Sattarov, I., Pevtsov, A., Karachik, N., et al., Solar cycle 23 in coronal bright points, Sol. Phys., 2010, vol. 262, no. 2, pp. 321–335. https://doi.org/10.1007/s11207-010-9524-5

    Article  Google Scholar 

  13. Sheeley, N.R., Jr. and Golub, L., Rapid changes in the fine structure of a coronal bright point and a small coronal active region, Sol. Phys., 1979, vol. 63, no. 1, pp. 119–126. https://doi.org/10.1007/BF00155702

    Article  Google Scholar 

  14. Sherdanov, Ch.T., Minenko, E.P., Tillaboev, A.M., and Sattarov, I., Two types of coronal bright points in the 24-th cycle of solar activity, in The Sun: New Challenges, Astrophysics and Space Science Proceedings, Berlin: Springer, 2012, vol. 30, pp. 197–202. https://doi.org/10.1007/978-3-642-29417-4_18

  15. Tian, H., Xia, L.-D., and Li, S., Long-period oscillations in solar coronal bright points, Astron. Astrophys., 2008, vol. 489, no. 2, pp. 741–745. https://doi.org/10.1051/0004-6361:200810146

    Article  Google Scholar 

  16. Torrence, C. and Compo, G.P., A practical guide to wavelet analysis, Bull. Am. Meteorol. Soc., 1998, vol. 79, no. 1, pp. 61–78. https://doi.org/10.1175/1520-0477(1998)079<0061:APGTWA>2.0.CO;2

    Article  Google Scholar 

  17. Ugarte-Urra, I., Dissertation talk: Brightness and magnetic evolution of solar coronal bright points, American Geophysical Union, Spring Meeting, 2005, abstract is SP22A-01.

  18. Ugarte-Urra, I., Doyle, J.G., Madjarska, M.S., and O’Shea, E., Signature of oscillations in coronal bright points, Astron. Astrophys., 2004a, vol. 418, pp. 313–324. https://doi.org/10.1051/0004-6361:20035666

    Article  Google Scholar 

  19. Ugarte-Urra, I., Doyle, J.G., Nakariakov, V.M., and Foley, C.R., CDS wide slit time-series of EUV coronal bright points, Astron. Astrophys., 2004b, vol. 425, pp. 1083–1095. https://doi.org/10.1051/0004-6361:20041069

    Article  Google Scholar 

  20. Vaiana, G.S., Davis, J.M., Giacconi, R., et al., X-ray observations of characteristic structures and time variations from the solar corona: Preliminary results from SKYLAB, Astrophys. J. Lett., 1973, vol. 185, no. 1, pp. L47–L51. https://doi.org/10.1086/181318

    Article  Google Scholar 

  21. Webb, D.F., Martin, S.F., Moses, D., and Harvey, J.W., The correspondence between X-ray bright points and evolving magnetic features in the quiet Sun, Sol. Phys., 1993, vol. 144, pp. 15–35. https://doi.org/10.1007/BF00667979

    Article  Google Scholar 

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ACKNOWLEDGMENTS

The data used in this paper is freely available from the archives of the SOHO mission (https://soho.nascom. nasa.gov/data/archive/) and the International Sunspot Index Center in Brussels (SIDC, RWC Belgium, World Data Center for the Sunspot Index, Royal Observatory of Belgium, SILSO, Sunspot Index and Long-term Solar Observations, http://sidc.be/silso). The authors are grateful to the teams of these projects.

Funding

The work was supported by the Astronomical Institute, Academy of Sciences of Uzbekistan, grant no. VA-FA-F-2-009.

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  1. Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, Astronomicheskaya str. 33, 100052, Tashkent, Uzbekistan

    E. P. Minenko & Sh. A. Ehgamberdiev

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  1. E. P. Minenko
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  2. Sh. A. Ehgamberdiev
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Correspondence to E. P. Minenko.

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Translated by A. Ivanov

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Minenko, E.P., Ehgamberdiev, S.A. Latitudinal-Temporal Analysis of Long-Periodic Variations of Coronal Bright Points. Geomagn. Aeron. 61, 1128–1134 (2021). https://doi.org/10.1134/S0016793221080168

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