Skip to main content
SpringerLink
Log in

Intersunspot Microwave Sources

  • New Eyes Looking At Solar Activity
  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

We studied a number of solar active regions using two-dimensional spatially resolved microwave observations. Data from the Nobeyama Radioheliograph and the Siberian Solar Radio Telescope together with observations by the Michelson Doppler Imager (MDI) onboard the Solar and Heliospheric Observatory (SOHO) have allowed us to identify long-lived intersunspot sources (ISSs) in most of the investigated active regions. Their centers are often located above the line-of-sight magnetic field inversion line that separates the leading and following polarities of a full active region (first type of ISS) or above the inversion line that separates magnetic polarities inside of a complex of sunspots (second type of ISS). ISSs of the first type are extended and, in general, they are sources of bremsstrahlung emission. ISSs of the second type are compact and are, most likely, sources of gyroresonance or gyrosynchrotron emission. We propose a qualitative model involving three types of magnetic connectivity to explain how long-lasting ISSs may be generated.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13

Similar content being viewed by others

References

  • Abramov-Maximov, V.E., Borovik, V.N., Opeikina, L.V., Tlatov, A.G.: 2014, Solar Phys., in this issue. DOI .

    Google Scholar 

  • Akhmedov, Sh.B., Borovik, V.N., Gelfreikh, G.B., Bogod, V.M., Korzhavin, A.N., Petrov, Z.E., Dikij, V.N., Lang, K., Willson, R.: 1986, Astrophys. J. 301, 460.

    Article  ADS  Google Scholar 

  • Bakunina, I.A., Melnikov, V.F.: 2010, In: Stepanov, A.V., Nagovitsyn, Yu.A. (eds.) Proc. XIV All-Russian Annual Pulkovo Conf. Solar and Solar-Terrestrial Physics – 2010, 31, in Russian.

    Google Scholar 

  • Bakunina, I.A., Melnikov, V.F., Shibasaki, K., Yarkina, E.Yu.: 2008, In: Stepanov, A.V., Nagovitsyn, Yu.A. (eds.) Proc. XII All-Russian Annual Pulkovo Conf. Solar and Solar-Terrestrial Physics – 2008, 17, in Russian.

    Google Scholar 

  • Bastian, T.S., Benz, A.O., Gary, D.E.: 1998, Annu. Rev. Astron. Astrophys. 36, 131.

    Article  ADS  Google Scholar 

  • Bogod, V.M., Kaltman, T.I., Yasnov, L.V.: 2012, Astrophys. Bull. 67, 425.

    Article  ADS  Google Scholar 

  • Delaboudinière, J.-P., Artzner, G.E., Brunaud, J., Gabriel, A.H., Hochedez, J.F., Millier, F., Song, X.Y., Au, B., Dere, K.P., Howard, R.A., Kreplin, R., Michels, D.J., Moses, J.D., Defise, J.M., Jamar, C., Rochus, P., Chauvineau, J.P., Marioge, J.P., Catura, R.C., Lemen, J.R., Shing, L., Stern, R.A., Gurman, J.B., Neupert, W.M., Maucherat, A., Clette, F., Cugnon, P., van Dessel, E.L.: 1995, Solar Phys. 162, 291.

    Article  ADS  Google Scholar 

  • Fleishman, G.D., Melnikov, V.F.: 2003, Astrophys. J. 584, 1071.

    Article  ADS  Google Scholar 

  • Franz, M.: 2012, Astron. Nachr. 333(10), 1009.

    Article  ADS  Google Scholar 

  • Gelfreikh, G.B.: 1994, Space Sci. Rev. 68, 249.

    Article  ADS  Google Scholar 

  • Kaltman, T.I., Korzhavin, A.N., Peterova, N.G.: 2007, Solar Phys. 242, 125.

    Article  ADS  Google Scholar 

  • Kaltman, T.I., Korzhavin, A.N., Peterova, N.G., Lubyshev, B.I., Maksimov, V.P., Alissandrakis, C.E., Fu, Q.: 1998. In: Alissandrakis, C.E., Schmieder, B. (eds.) Euroconference Advances in Solar Physics, Astron. Soc. Pacific C.S. 155, 140.

    Google Scholar 

  • Kundu, M.R., Alissandrakis, C.E., Bregman, J.D., Hin, A.C.: 1977, Astrophys. J. 213, 278.

    Article  ADS  Google Scholar 

  • Melnikov, V.F., Shibasaki, K., Reznikova, V.E.: 2002, Astrophys. J. Lett. 580, L185.

    Article  ADS  Google Scholar 

  • Peterova, N.G.: 1994, Bull. Spec. Astrophys. Obs. 38, 133.

    ADS  Google Scholar 

  • Peterova, N.G., Golovko, A.A., Stoyanova, M.N.: 1997, Astron. Rep. 41, 409.

    ADS  Google Scholar 

  • Peterova, N.G., Korzhavin, A.N.: 1998, Bull. Spec. Astrophys. Obs. 44, 71.

    ADS  Google Scholar 

  • Peterova, N.G., Ryabov, B.I., Tokhchukova, S.Kh.: 2001, Bull. Spec. Astrophys. Obs. 51, 106.

    ADS  Google Scholar 

  • Reznikova, V.E., Melnikov, V.F., Shibasaki, K., Gorbikov, S.P., Pyatakov, N.P., Myagkova, I.N., Ji, H.S.: 2009, Astrophys. J. 697, 735.

    Article  ADS  Google Scholar 

  • Quinones, J.A., Korzhavin, A.N., Peterova, N.G., Santos, J.: 1975, Soln. Dannye 3, 87, in Russian.

    ADS  Google Scholar 

  • Smolkov, G.Ya., Uralov, A.M., Bakunina, I.A.: 2009, Geomagn. Aeron. 49, 1101.

    Article  ADS  Google Scholar 

  • Sych, R.A., Uralov, A.M., Korzhavin, A.N.: 1993, Solar Phys. 144, 59.

    Article  ADS  Google Scholar 

  • Tun, S.D., Gary, D.E., Georgoulis, M.K.: 2011, Astrophys. J. 728, 1, 16 pp.

    Article  ADS  Google Scholar 

  • Uralov, A.M., Rudenko, G.V., Rudenko, I.G.: 2006a, Publ. Astron. Soc. Japan 58, 21.

    ADS  Google Scholar 

  • Uralov, A.M., Rudenko, G.V., Rudenko, I.G.: 2006b, Izv. Akad. Nauk SSSR, Ser. Fiz. 70, 1475.

    Google Scholar 

  • Uralov, A.M., Nakajima, H., Zandanov, V.G., Grechnev, V.V.: 2000, Solar Phys. 197, 275.

    Article  ADS  Google Scholar 

Download references

Acknowledgements

This work was partly supported by the Russian Foundation for Basic Research (projects No. 13-02-00656, 13-02-00586, 13-02-00714, and 14-02-00924), the Presidium of Russian Academy of Sciences (program No. 22) and by the European Commission Exchange Program MC FP7-PEOPLE-2011-IRSES-295272 RADIOSUN. We are grateful to the SOHO team, TRACE team and NoRH team for allowing us to use the data. The RATAN-600 observations were carried out with the financial support of the Ministry of Education and Science of the Russian Federation (state contract 14.518.11.7054). We would also like to thank the anonymous referee for useful comments.

Author information

Authors and Affiliations

  1. National Research University Higher School of Economics, 25/12 B. Pecherskaya ul., Nizhny Novgorod, 603155, Russia

    I. A. Bakunina

  2. Central Astronomical Observatory at Pulkovo, Russian Academy of Sciences, Pulkovskoe sh. 65, St. Petersburg, 196140, Russia

    V. F. Melnikov, A. A. Solov’ev & V. E. Abramov-Maximov

  3. Radiophysical Research Institute, 25/12 B. Pecherskaya ul., Nizhny Novgorod, 603950, Russia

    V. F. Melnikov

Authors
  1. I. A. Bakunina
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. F. Melnikov
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. A. Solov’ev
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. V. E. Abramov-Maximov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to I. A. Bakunina.

Additional information

New Eyes Looking at Solar Activity: Challenges for Theory and Simulations

Guest Editors: Silja Pohjolainen and Marian Karlický

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Bakunina, I.A., Melnikov, V.F., Solov’ev, A.A. et al. Intersunspot Microwave Sources. Sol Phys 290, 37–52 (2015). https://doi.org/10.1007/s11207-014-0614-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11207-014-0614-7

Keywords

Search

Navigation