{"id":4875,"date":"2012-07-16T00:00:00","date_gmt":"2012-07-15T22:00:00","guid":{"rendered":"https:\/\/www.ieec.cat\/lestrella-swift-j1822-31606%e2%80%b2-un-magnetar-an%c3%b2mal-a-lunivers-not-translated\/"},"modified":"2022-12-22T23:20:39","modified_gmt":"2022-12-22T22:20:39","slug":"lestrella-swift-j1822-31606%e2%80%b2-un-magnetar-an%c3%b2mal-a-lunivers-not-translated","status":"publish","type":"post","link":"https:\/\/www.ieec.cat\/en\/lestrella-swift-j1822-31606%e2%80%b2-un-magnetar-an%c3%b2mal-a-lunivers-not-translated\/","title":{"rendered":"L\u2019estrella \u2018SWIFT J1822.31606\u2032, un magnetar an\u00f2mal a l\u2019Univers [NOT TRANSLATED]"},"content":{"rendered":"

[et_pb_section fb_built=”1″ fullwidth=”on” theme_builder_area=”post_content” _builder_version=”4.14.8″ _module_preset=”default” height=”114px” background_color=”” hover_enabled=”0″ sticky_enabled=”0″ title_text=”” background_image=”\/wp-content\/uploads\/2022\/04\/slider-corpo2.jpg”][\/et_pb_section][et_pb_section fb_built=”1″ theme_builder_area=”post_content” _builder_version=”4.14.8″ _module_preset=”default” custom_padding=”||0px||false|false” custom_margin=”||0px||false|false” hover_enabled=”0″ sticky_enabled=”0″][et_pb_row _builder_version=”4.14.8″ _module_preset=”default” theme_builder_area=”post_content”][et_pb_column _builder_version=”4.14.8″ _module_preset=”default” type=”4_4″ theme_builder_area=”post_content”][et_pb_text _builder_version=”4.14.8″ _module_preset=”default” theme_builder_area=”post_content” _dynamic_attributes=”content” hover_enabled=”0″ sticky_enabled=”0″ custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false”]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IjxoMSBjbGFzcz1cImVudHJ5X3RpdGxlXCI+IiwiYWZ0ZXIiOiI8L2gxPiJ9fQ==@[\/et_pb_text][et_pb_text _builder_version=”4.14.8″ _module_preset=”default” theme_builder_area=”post_content” _dynamic_attributes=”content” custom_padding=”0px||0px||false|false” custom_margin=”0px||0px||false|false” hover_enabled=”0″ sticky_enabled=”0″]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9kYXRlIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJkYXRlX2Zvcm1hdCI6ImN1c3RvbSIsImN1c3RvbV9kYXRlX2Zvcm1hdCI6IlktbS1kIEg6aTpzIn19@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.14.8″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” top_divider_color=”RGBA(255,255,255,0)” top_divider_height=”0px” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][et_pb_row column_structure=”4_4″ _builder_version=”4.14.8″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.14.8″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.ieec.cat\/wp-content\/uploads\/2022\/12\/1543421914_cb084e57064f7084e1efa1edd7a95c06_swift1822_fractal_image_1_1.jpg” alt=”L\u2019estrella \u2018SWIFT J1822.31606\u2032, un magnetar an\u00f2mal a l\u2019Univers [NOT TRANSLATED]” _builder_version=”4.14.8″ _module_preset=”default” title_text=”PR_Image1.png” hover_enabled=”0″ sticky_enabled=”0″ width=”600px” module_alignment=”center”][\/et_pb_image][et_pb_text _builder_version=”4.14.8″ _module_preset=”default” global_colors_info=”{}”](Catalan version)<\/p>\n

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mso-bidi-font-family:Arial;mso-ansi-language:CA\u201d>L\u2019estrella \u2018SWIFT J1822.31606\u2032, un magnetar an\u00f2mal a l\u2019Univers<\/p>\n

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mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>Situada a uns 16.300 anys llum de la Terra a la constel\u00b7laci\u00f3 de Sagitari, t\u00e9 aproximadament uns 550.000 anys d\u0092edat mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d><\/p>\n

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mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>L\u2019estudi corrobora l\u2019exist\u00e8ncia de magnetars febles, ja que \u00e9s el segon del seu tipus que s\u2019ha aconseguit identificar<\/p>\n

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mso-ansi-language:CA\u201d> <\/p>\n

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mso-ansi-language:CA\u201d>16.07.2012<\/p>\n

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mso-ansi-language:CA\u201d>Barcelona. Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;<\/p>\n

mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d> Un projecte liderat per la investigadora de l\u0092Institut de Ci\u00e8ncies de l\u0092Espai (CSIC-IEEC) Nanda Rea, ha descobert el segon magnetar an\u00f2mal de l\u0092Univers. Els magnetars, estrelles de neutrons amb una massa una mica m\u00e9s gran que la del Sol, s\u00f3n capa\u00e7os de contenir tota la seva massa comprimida en un radi d\u2019aproximadament 10 quil\u00f2metres, mentre que el Sol requereix uns 696.000 quil\u00f2metres. El treball, realitzat des de l\u2019Institut de Ci\u00e8ncies de l\u2019Espai, apareix a l\u2019\u00faltim n\u00famero de la revista Astrophysical Journal.<\/p>\n

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bold\u201d>El magnetar SWIFT J1822.3 mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:\u201dMinion Pro\u201d;<\/p>\n

mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>\u2010 Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>1606, situat a 16.300 anys llum de la Terra, a la constel\u00b7laci\u00f3 de Sagitari, t\u00e9 aproximadament una edat de 550.000 anys, de forma que es tracta d\u0092un objecte relativament jove dins del zool\u00f2gic c\u00f2smic.<\/p>\n

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bold\u201d>La investigadora que lidera el treball, Nanda Rea, detalla: \u0093Contr\u00e0riament al que la teoria predeia sobre aquests objectes, el magnetar mostra un camp magn\u00e8tic extern molt feble. L\u2019an\u00e0lisi de les dades ha demostrat que \u00e9s el segon objecte de la seva classe amb un camp magn\u00e8tic feble, similar en intensitat al dels p\u00falsars\u0094.<\/p>\n

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bold\u201d>Durant la nit del 14 de juliol 2011, una sobtada erupci\u00f3 de raigs gamma de l\u2019estrella<\/p>\n

SWIFT J1822.3 \u201cTimes New Roman\u201d;mso-bidi-font-family:\u201dMinion Pro\u201d;mso-ansi-language:CA;<\/p>\n

mso-bidi-font-weight:bold\u201d>\u2010 mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;<\/p>\n

mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>1606 va ser observada per l\u2019instrument BAT (Burst Alert Telescope) del sat\u00e8l\u00b7lit Swift de la NASA. Despr\u00e9s de l\u2019erupci\u00f3, els investigadors van dirigir els instruments espacials de raigs X cap aquesta zona i van realitzar un programa de seguiment de l\u2019objecte durant diversos mesos. Al telescopi espacial Swift se li van unir Chandra, RXTE, Suzaku i XMMNewton. Observacions complement\u00e0ries en l\u2019\u00f2ptic amb el Gran Telescopio Canarias i a l\u2019infraroig amb el Telescopi Infraroig UK a l\u2019Observatori de Mauna Kea van mostrar l\u2019abs\u00e8ncia d\u2019un objecte en aquesta zona al rang \u00f2ptic i infraroig de l\u2019espectre electromagn\u00e8tic, refor\u00e7ant la teoria de la pres\u00e8ncia d\u2019un magnetar.<\/p>\n

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bold\u201d>El descobriment ha posat en dubte l\u2019anterior paradigma, \u0093ja que aquest segon<\/p>\n

magnetar presenta caracter\u00edstiques de la seva classe, com s\u00f3n les erupcions magn\u00e8tiques violentes, per\u00f2 amb un camp magn\u00e8tic extern similar al d\u2019un radio-p\u00falsar\u0094,<\/p>\n

comenta la investigadora del CSIC-IEEC.<\/p>\n

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bold\u201d>Fins ara, es creia que els magnetars es diferenciaven dels r\u00e0dio-p\u00falsars per tenir un camp magn\u00e8tic molt intens. El camp magn\u00e8tic d\u2019un magnetar \u00e9s aproximadament 1.000 vegades m\u00e9s gran que el d\u2019un p\u00falsar normal, que a m\u00e9s \u00e9s al voltant de mil bilions de vegades m\u00e9s gran que el del Sol. A m\u00e9s, aquests camps magn\u00e8tics tan elevats tenen l\u00ednies magn\u00e8tiques tan tortes que de sobte es trenquen i experimenten erupcions de part\u00edcules de molt altes energies, tal com succeeix al Sol tot i que a molt m\u00e9s petita escala. Pel contrari, els p\u00falsars no experimenten erupcions sobtades, i tenen una emissi\u00f3 tranquil\u00b7la i moderada.<\/p>\n

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bold\u201d>Rea afegeix que \u0093el descobriment d\u2019aquest segon objecte amb caracter\u00edstiques de magnetar, per\u00f2 amb un camp magn\u00e8tic d\u2019un r\u00e0dio-pulsar refor\u00e7a la idea que el comportament de tipus magnetar pot presentar-se en un rang d\u2019objectes estel\u00b7lars molts m\u00e9s ampli del qu\u00e8 es creia en el passat\u0094. Possiblement, afegeix, aquest comportament estigui relacionat amb la forma en qu\u00e8 es genera el camp magn\u00e8tic a l\u2019interior i sobre l\u0092escor\u00e7a de l\u2019estrella i no al camp m\u00e9s extern, que \u00e9s l\u2019\u00fanic que podem mesurar amb les observacions.<\/p>\n

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bold\u201d>Refer\u00e8ncia: mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-fareast-theme-font:minor-fareast;<\/p>\n

mso-bidi-font-family:\u201dTimes New Roman\u201d;mso-bidi-theme-font:minor-bidi;<\/p>\n

mso-ansi-language:EN-US;mso-fareast-language:EN-US\u201d> Arial;color:#7F7F7F;mso-ansi-language:EN-US;mso-bidi-font-weight:bold\u201d>N. Rea et al mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;<\/p>\n

color:#7F7F7F;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>, A new low magnetic field magnetar: the 2011 outburst of Swift J1822.3-1606 mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;<\/p>\n

color:#7F7F7F;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>, Arial;color:#7F7F7F;mso-ansi-language:EN-US;mso-bidi-font-weight:bold\u201d>2012 ApJ 754 27 doi:10.1088\/0004-637X\/754\/1\/27 mso-bidi-font-family:Arial;color:#7F7F7F;mso-ansi-language:CA;mso-bidi-font-weight:<\/p>\n

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\u201cTimes New Roman\u201d;mso-ansi-language:CA\u201d>Informaci\u00f3 de Contacte<\/p>\n

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mso-fareast-font-family:\u201dTimes New Roman\u201d;font-variant:small-caps;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Nanda Rea<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Institut de Ci\u00e8ncies de l\u0092Espai, ICE (CSIC-IEEC)<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Email: rea@ice.csic.es<\/a> \u201cTimes New Roman\u201d;color:#7F7F7F;mso-ansi-language:CA\u201d> <\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Tel: +34 93 581 43 75<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d><\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d><\/p>\n

mso-fareast-font-family:\u201dTimes New Roman\u201d;font-variant:small-caps;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Alina Hirschmann<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Departament de Comunicaci\u00f3 Cient\u00edfica<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Institut d\u0092Estudis Espacials de Catalunya (IEEC)<\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Email: alina@ieec.uab.es<\/a> \u201cTimes New Roman\u201d;color:#7F7F7F;mso-ansi-language:CA\u201d><\/p>\n

11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;color:#7F7F7F;<\/p>\n

mso-ansi-language:CA\u201d>Tel: +34 93 581 4779<\/p>\n

\u201cTimes New Roman\u201d;color:#7F7F7F;mso-ansi-language:CA\u201d><\/p>\n

Imatges:<\/p>\n

Figura: Imatge art\u00edstica d\u0092un magnetar. Credit: Nanda Rea\/ Jeff Michaud<\/p>\n

Nota de Prensa ICE (CSIC-IEEC)<\/a><\/p>\n

Nota de Prensa de la ESA<\/a><\/p>\n

Read more<\/a> [NOT TRANSLATED][\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

” _builder_version=”4.14.8″ _module_preset=”default” title_text=”PR_Image1.png” hover_enabled=”0″ sticky_enabled=”0″ width=”600px” module_alignment=”center”](Catalan version)mso-bidi-font-size:11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;mso-ansi-language:CA\u201d>L\u2019estrella \u2018SWIFT J1822.31606\u2032, un magnetar an\u00f2mal a l\u2019Univers\u00b7 mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>Situada a uns 16.300 anys llum de la Terra a la constel\u00b7laci\u00f3 de Sagitari, t\u00e9 aproximadament uns 550.000 anys d\u0092edat mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>\u201cTimes New Roman\u201d;mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>\u00b7 mso-bidi-font-size:11.0pt;font-family:Arial;mso-fareast-font-family:\u201dTimes New Roman\u201d;mso-bidi-font-family:Arial;mso-ansi-language:CA;mso-bidi-font-weight:bold\u201d>L\u2019estudi corrobora l\u2019exist\u00e8ncia de magnetars febles, ja que \u00e9s el […]<\/p>\n","protected":false},"author":0,"featured_media":4871,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"2880","footnotes":""},"categories":[71,76],"tags":[],"class_list":["post-4875","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-announcements","category-other-announcements"],"yoast_head":"\nL\u2019estrella \u2018SWIFT J1822.31606\u2032, un magnetar an\u00f2mal a l\u2019Univers [NOT TRANSLATED] - 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