Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series

I. Yu Grigoryeva, V. N. Borovik, N. G. Makarenko, I. S. Knyazeva, I. N. Myagkova, A. V. Bogomolov, D. V. Prosovetsky, L. M. Karimova

Research output

Abstract

The pre-flaring activity of the X3.0 (GOES class) flare that occurred in active region (AR) NOAA 10030 on 2002 July 15 is analyzed. We concentrate on the microwave (MW) emission and MDI topology in AR during some days before the X3 flare. Daily solar multi-wave observations with the RATAN-600 radio telescope in the range of 1.8–5.0 cm have been used. The following features in MW emission of AR have been detected in pre-flare period: (1) We have a new evidence of the MW “peculiar” source which has appeared 1 day before the X3 flare as a result of formation of δ-configuration in the central part of sunspot group. Such “peculiar” sources have been observed earlier with RATAN-600 in many active regions as precursors of high flare activity. (2) The most intensive local MW sources registered in the regions between the main sunspots coincide with the places of greatest values of the emission measure calculated by two lines of UV emission (SOHO/EIT). (3) The MW emission associated with the leading sunspot in AR considerably decreased (disappeared) 2 days before the X3.0 flare probably due to the changing of height of the emitting region. A topological method for detecting in AR a new emergence of magnetic flux using successive SOHO/MDI images of the solar disk is proposed. It was found that a number of disconnected components increases directly before the series of power flares (in particular, before the event on 2002 July 15) or accompanies this process.

Original languageEnglish
Title of host publicationThe Sun
Subtitle of host publicationNew Challenges - Proceedings of Symposium 3 of JENAM 2011
EditorsKatya Georgieva, Yury A. Nagovitsyn, Vladimir N. Obridko
PublisherSpringer
Pages165-177
Number of pages13
Volume30
ISBN (Print)9783642294167
DOIs
Publication statusPublished - 1 Jan 2012
EventJoint European and National Astronomical Meeting, JENAM 2011 - St. Petersburg
Duration: 4 Jul 20118 Jul 2011

Conference

ConferenceJoint European and National Astronomical Meeting, JENAM 2011
CountryRussian Federation
CitySt. Petersburg
Period4/07/118/07/11

Fingerprint

microwave emission
topology
flares
Microwaves
Topology
sunspots
sunspot
Radio telescopes
Magnetic flux
microwaves
radio telescopes
microwave
GOES
magnetic flux
sun
radio
configurations

Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Science Applications
  • Spectroscopy
  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

Grigoryeva, I. Y., Borovik, V. N., Makarenko, N. G., Knyazeva, I. S., Myagkova, I. N., Bogomolov, A. V., ... Karimova, L. M. (2012). Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series. In K. Georgieva, Y. A. Nagovitsyn, & V. N. Obridko (Eds.), The Sun: New Challenges - Proceedings of Symposium 3 of JENAM 2011 (Vol. 30, pp. 165-177). Springer. https://doi.org/10.1007/978-3-642-29417-4_15
Grigoryeva, I. Yu ; Borovik, V. N. ; Makarenko, N. G. ; Knyazeva, I. S. ; Myagkova, I. N. ; Bogomolov, A. V. ; Prosovetsky, D. V. ; Karimova, L. M. / Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series. The Sun: New Challenges - Proceedings of Symposium 3 of JENAM 2011. editor / Katya Georgieva ; Yury A. Nagovitsyn ; Vladimir N. Obridko. Vol. 30 Springer, 2012. pp. 165-177
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abstract = "The pre-flaring activity of the X3.0 (GOES class) flare that occurred in active region (AR) NOAA 10030 on 2002 July 15 is analyzed. We concentrate on the microwave (MW) emission and MDI topology in AR during some days before the X3 flare. Daily solar multi-wave observations with the RATAN-600 radio telescope in the range of 1.8–5.0 cm have been used. The following features in MW emission of AR have been detected in pre-flare period: (1) We have a new evidence of the MW “peculiar” source which has appeared 1 day before the X3 flare as a result of formation of δ-configuration in the central part of sunspot group. Such “peculiar” sources have been observed earlier with RATAN-600 in many active regions as precursors of high flare activity. (2) The most intensive local MW sources registered in the regions between the main sunspots coincide with the places of greatest values of the emission measure calculated by two lines of UV emission (SOHO/EIT). (3) The MW emission associated with the leading sunspot in AR considerably decreased (disappeared) 2 days before the X3.0 flare probably due to the changing of height of the emitting region. A topological method for detecting in AR a new emergence of magnetic flux using successive SOHO/MDI images of the solar disk is proposed. It was found that a number of disconnected components increases directly before the series of power flares (in particular, before the event on 2002 July 15) or accompanies this process.",
author = "Grigoryeva, {I. Yu} and Borovik, {V. N.} and Makarenko, {N. G.} and Knyazeva, {I. S.} and Myagkova, {I. N.} and Bogomolov, {A. V.} and Prosovetsky, {D. V.} and Karimova, {L. M.}",
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Grigoryeva, IY, Borovik, VN, Makarenko, NG, Knyazeva, IS, Myagkova, IN, Bogomolov, AV, Prosovetsky, DV & Karimova, LM 2012, Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series. in K Georgieva, YA Nagovitsyn & VN Obridko (eds), The Sun: New Challenges - Proceedings of Symposium 3 of JENAM 2011. vol. 30, Springer, pp. 165-177, St. Petersburg, 4/07/11. https://doi.org/10.1007/978-3-642-29417-4_15

Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series. / Grigoryeva, I. Yu; Borovik, V. N.; Makarenko, N. G.; Knyazeva, I. S.; Myagkova, I. N.; Bogomolov, A. V.; Prosovetsky, D. V.; Karimova, L. M.

The Sun: New Challenges - Proceedings of Symposium 3 of JENAM 2011. ed. / Katya Georgieva; Yury A. Nagovitsyn; Vladimir N. Obridko. Vol. 30 Springer, 2012. p. 165-177.

Research output

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T1 - Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series

AU - Grigoryeva, I. Yu

AU - Borovik, V. N.

AU - Makarenko, N. G.

AU - Knyazeva, I. S.

AU - Myagkova, I. N.

AU - Bogomolov, A. V.

AU - Prosovetsky, D. V.

AU - Karimova, L. M.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The pre-flaring activity of the X3.0 (GOES class) flare that occurred in active region (AR) NOAA 10030 on 2002 July 15 is analyzed. We concentrate on the microwave (MW) emission and MDI topology in AR during some days before the X3 flare. Daily solar multi-wave observations with the RATAN-600 radio telescope in the range of 1.8–5.0 cm have been used. The following features in MW emission of AR have been detected in pre-flare period: (1) We have a new evidence of the MW “peculiar” source which has appeared 1 day before the X3 flare as a result of formation of δ-configuration in the central part of sunspot group. Such “peculiar” sources have been observed earlier with RATAN-600 in many active regions as precursors of high flare activity. (2) The most intensive local MW sources registered in the regions between the main sunspots coincide with the places of greatest values of the emission measure calculated by two lines of UV emission (SOHO/EIT). (3) The MW emission associated with the leading sunspot in AR considerably decreased (disappeared) 2 days before the X3.0 flare probably due to the changing of height of the emitting region. A topological method for detecting in AR a new emergence of magnetic flux using successive SOHO/MDI images of the solar disk is proposed. It was found that a number of disconnected components increases directly before the series of power flares (in particular, before the event on 2002 July 15) or accompanies this process.

AB - The pre-flaring activity of the X3.0 (GOES class) flare that occurred in active region (AR) NOAA 10030 on 2002 July 15 is analyzed. We concentrate on the microwave (MW) emission and MDI topology in AR during some days before the X3 flare. Daily solar multi-wave observations with the RATAN-600 radio telescope in the range of 1.8–5.0 cm have been used. The following features in MW emission of AR have been detected in pre-flare period: (1) We have a new evidence of the MW “peculiar” source which has appeared 1 day before the X3 flare as a result of formation of δ-configuration in the central part of sunspot group. Such “peculiar” sources have been observed earlier with RATAN-600 in many active regions as precursors of high flare activity. (2) The most intensive local MW sources registered in the regions between the main sunspots coincide with the places of greatest values of the emission measure calculated by two lines of UV emission (SOHO/EIT). (3) The MW emission associated with the leading sunspot in AR considerably decreased (disappeared) 2 days before the X3.0 flare probably due to the changing of height of the emitting region. A topological method for detecting in AR a new emergence of magnetic flux using successive SOHO/MDI images of the solar disk is proposed. It was found that a number of disconnected components increases directly before the series of power flares (in particular, before the event on 2002 July 15) or accompanies this process.

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A2 - Nagovitsyn, Yury A.

A2 - Obridko, Vladimir N.

PB - Springer

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Grigoryeva IY, Borovik VN, Makarenko NG, Knyazeva IS, Myagkova IN, Bogomolov AV et al. Variations of microwave emission and mdi topology in the active region NOAA 10030 before and during the power flare series. In Georgieva K, Nagovitsyn YA, Obridko VN, editors, The Sun: New Challenges - Proceedings of Symposium 3 of JENAM 2011. Vol. 30. Springer. 2012. p. 165-177 https://doi.org/10.1007/978-3-642-29417-4_15