The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX

We report on the photospheric evolution of an intermediate-scale (4Mm footpoint separation) magnetic bipole, from emergence to decay, observed in the quiet Sun at high spatial (03) and temporal (33s) resolution. The observations were acquired by the Imaging Magnetograph Experiment imaging magnetogra...

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Autores: Guglielmino, Salvo L., Martínez Pillet, Valentín, Bonet, J. A., Del Toro Iniesta, J. Carlos, Bellot Rubio, Luis R., Solanki, S. K., Schmidt, W., Gandorfer, A., Barthol, P., Knölker, M.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/415663
Acesso em linha:http://hdl.handle.net/10261/415663
Access Level:acceso abierto
Palavra-chave:Sun: activity
Sun: magnetic topology
Sun: photosphere
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dc.title.none.fl_str_mv The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
title The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
spellingShingle The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
Guglielmino, Salvo L.
Sun: activity
Sun: magnetic topology
Sun: photosphere
title_short The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
title_full The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
title_fullStr The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
title_full_unstemmed The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
title_sort The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaX
dc.creator.none.fl_str_mv Guglielmino, Salvo L.
Martínez Pillet, Valentín
Bonet, J. A.
Del Toro Iniesta, J. Carlos
Bellot Rubio, Luis R.
Solanki, S. K.
Schmidt, W.
Gandorfer, A.
Barthol, P.
Knölker, M.
author Guglielmino, Salvo L.
author_facet Guglielmino, Salvo L.
Martínez Pillet, Valentín
Bonet, J. A.
Del Toro Iniesta, J. Carlos
Bellot Rubio, Luis R.
Solanki, S. K.
Schmidt, W.
Gandorfer, A.
Barthol, P.
Knölker, M.
author_role author
author2 Martínez Pillet, Valentín
Bonet, J. A.
Del Toro Iniesta, J. Carlos
Bellot Rubio, Luis R.
Solanki, S. K.
Schmidt, W.
Gandorfer, A.
Barthol, P.
Knölker, M.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Educación Superior, Ciencia y Tecnología (República Dominicana)
Ministerio de Ciencia e Innovación (España)
Junta de Andalucía
European Commission
Federal Ministry of Research, Technology and Space (Germany)
Max Planck Society
Ministry of Education, Science and Technology (South Korea)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Sun: activity
Sun: magnetic topology
Sun: photosphere
topic Sun: activity
Sun: magnetic topology
Sun: photosphere
description We report on the photospheric evolution of an intermediate-scale (4Mm footpoint separation) magnetic bipole, from emergence to decay, observed in the quiet Sun at high spatial (03) and temporal (33s) resolution. The observations were acquired by the Imaging Magnetograph Experiment imaging magnetograph during the first science flight of the SUNRISE balloon-borne solar observatory. The bipole flux content is 6 × 1017Mx, representing a structure bridging the gap between granular scale bipoles and the smaller ephemeral regions. Footpoints separate at a speed of 3.5 km s-1 and reach a maximum distance of 4.5Mm before the field dissolves. The evolution of the bipole is revealed to be very dynamic: we found a proper motion of the bipole axis and detected a change of the azimuth angle of 90°in 300s, which may indicate the presence of some writhe in the emerging structure. The overall morphology and behavior are in agreement with previous analyses of bipolar structures emerging at the granular scale, but we also found several similarities with emerging flux structures at larger scales. The flux growth rate is 2.6 × 1015Mxs-1, while the mean decay rate is one order of magnitude smaller. We describe in some detail the decay phase of the bipole footpoints that includes break up into smaller structures, and interaction with preexisting fields leading to cancellation, but it appears to be dominated by an as-yet unidentified diffusive process that removes most of the flux with an exponential flux decay curve. The diffusion constant (8 × 102 km2 s-1) associated with this decay is similar to the values used to describe the large-scale diffusion in flux transport models. © 2012. The American Astronomical Society. All rights reserved.
publishDate 2012
dc.date.none.fl_str_mv 2012
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/415663
url http://hdl.handle.net/10261/415663
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
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info:eu-repo/grantAgreement/MEC//ESP2006-13030-C06-01
info:eu-repo/grantAgreement/MICINN//AYA2009-14105-C06-06
http://dx.doi.org/10.1088/0004-637X/745/2/160
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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spelling The frontier between small-scale bipoles and ephemeral regions in the solar photosphere: Emergence and decay of an intermediate-scale bipole observed with sunrise/IMaXGuglielmino, Salvo L.Martínez Pillet, ValentínBonet, J. A.Del Toro Iniesta, J. CarlosBellot Rubio, Luis R.Solanki, S. K.Schmidt, W.Gandorfer, A.Barthol, P.Knölker, M.Sun: activitySun: magnetic topologySun: photosphereWe report on the photospheric evolution of an intermediate-scale (4Mm footpoint separation) magnetic bipole, from emergence to decay, observed in the quiet Sun at high spatial (03) and temporal (33s) resolution. The observations were acquired by the Imaging Magnetograph Experiment imaging magnetograph during the first science flight of the SUNRISE balloon-borne solar observatory. The bipole flux content is 6 × 1017Mx, representing a structure bridging the gap between granular scale bipoles and the smaller ephemeral regions. Footpoints separate at a speed of 3.5 km s-1 and reach a maximum distance of 4.5Mm before the field dissolves. The evolution of the bipole is revealed to be very dynamic: we found a proper motion of the bipole axis and detected a change of the azimuth angle of 90°in 300s, which may indicate the presence of some writhe in the emerging structure. The overall morphology and behavior are in agreement with previous analyses of bipolar structures emerging at the granular scale, but we also found several similarities with emerging flux structures at larger scales. The flux growth rate is 2.6 × 1015Mxs-1, while the mean decay rate is one order of magnitude smaller. We describe in some detail the decay phase of the bipole footpoints that includes break up into smaller structures, and interaction with preexisting fields leading to cancellation, but it appears to be dominated by an as-yet unidentified diffusive process that removes most of the flux with an exponential flux decay curve. The diffusion constant (8 × 102 km2 s-1) associated with this decay is similar to the values used to describe the large-scale diffusion in flux transport models. © 2012. The American Astronomical Society. All rights reserved.This work has been partially funded by the Spanish Ministe- rio de Educaci´on y Ciencia, through projects ESP2006-13030- C06-01/02/03/04 and AYA2009-14105-C06, and Junta de An- daluc´ıa through project P07-TEP-2687, including a percent- age from European FEDER funds. The German contribution to Sunrise is funded by the Bundesministerium f¨ur Wirtschaft und Technologie through Deutsches Zentrum f¨ur Luft- und Raum- fahrt e.V. (DLR), grant No. 50 OU 0401, and by the Innova- tionsfond of the President of the Max Planck Society (MPG). Financial support by the European Commission through the SOLAIRE Network (MTRN-CT-2006-035484) is gratefully ac- knowledged. S.L.G. and L.R.B.R. acknowledge insightful dis- cussions on small-scale flux emergence processes within the ISSI International Team lead by K. Galsgaard and F. Zuccarello at the ISSI (International Space Science Institute, Bern), and the ISSI for support. This work has been partially supported by the WCU grant (No. R31-10016) funded by the Korean Min- istry of Education, Science and Technology. Use of NASA’s Astrophysical Data System is gratefully acknowledged. Facility: SUNRISEPeer reviewedIOP PublishingMinisterio de Educación Superior, Ciencia y Tecnología (República Dominicana)Ministerio de Ciencia e Innovación (España)Junta de AndalucíaEuropean CommissionFederal Ministry of Research, Technology and Space (Germany)Max Planck SocietyMinistry of Education, Science and Technology (South Korea)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/415663reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MEC//ESP2006-13030-C06-01info:eu-repo/grantAgreement/MICINN//AYA2009-14105-C06-06http://dx.doi.org/10.1088/0004-637X/745/2/160Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4156632026-05-22T06:33:51Z
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