{"created":"2021-03-01T06:32:42.550286+00:00","id":24734,"links":{},"metadata":{"_buckets":{"deposit":"16618147-7986-4cbf-bd9c-1688e500807e"},"_deposit":{"id":"24734","owners":[],"pid":{"revision_id":0,"type":"depid","value":"24734"},"status":"published"},"_oai":{"id":"oai:nagoya.repo.nii.ac.jp:00024734","sets":["879:880:881"]},"author_link":["73418","73419","73420","73421","73422"],"item_10_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017-06-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"L20","bibliographicPageStart":"L20","bibliographicVolumeNumber":"841","bibliographic_titles":[{"bibliographic_title":"The Astrophysical Journal Letters","bibliographic_titleLang":"en"}]}]},"item_10_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We report the discovery of a brightness enhancement in the center of a large sunspot umbra at a wavelength of 3 mm using the Atacama Large Millimeter/sub-millimeter Array (ALMA). Sunspots are among the most prominent features on the solar surface, but many of their aspects are surprisingly poorly understood. We analyzed a λ = 3 mm (100 GHz) mosaic image obtained by ALMA that includes a large sunspot within the active region AR12470, on 2015 December 16. The 3 mm map has a 300'' × 300'' field of view and 4farcs9 × 2farcs2 spatial resolution, which is the highest spatial resolution map of an entire sunspot in this frequency range. We find a gradient of 3 mm brightness from a high value in the outer penumbra to a low value in the inner penumbra/outer umbra. Within the inner umbra, there is a marked increase in 3 mm brightness temperature, which we call an umbral brightness enhancement. This enhanced emission corresponds to a temperature excess of 800 K relative to the surrounding inner penumbral region and coincides with excess brightness in the 1330 and 1400 Å slit-jaw images of the Interface Region Imaging Spectrograph (IRIS), adjacent to a partial lightbridge. This λ = 3 mm brightness enhancement may be an intrinsic feature of the sunspot umbra at chromospheric heights, such as a manifestation of umbral flashes, or it could be related to a coronal plume, since the brightness enhancement was coincident with the footpoint of a coronal loop observed at 171 Å.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10_identifier_60":{"attribute_name":"URI","attribute_value_mlt":[{"subitem_identifier_type":"DOI","subitem_identifier_uri":"https://doi.org/10.3847/2041-8213/aa71b5"},{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/2237/26956"}]},"item_10_publisher_32":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOP publishing","subitem_publisher_language":"en"}]},"item_10_relation_11":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.3847/2041-8213/aa71b5","subitem_relation_type_select":"DOI"}}]},"item_10_rights_12":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2017. The American Astronomical Society","subitem_rights_language":"en"}]},"item_10_select_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_10_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2041-8205","subitem_source_identifier_type":"PISSN"}]},"item_1615787544753":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Iwai, Kazumasa","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"73418","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Loukitcheva, Maria","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"73419","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shimojo, Masumi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"73420","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Solanki, Sami K.","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"73421","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"White, Stephen M.","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"73422","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-02-22"}],"displaytype":"detail","filename":"Iwai_2017_ApJL_841_L20.pdf","filesize":[{"value":"3.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Iwai_2017_ApJL_841_L20.pdf","objectType":"fulltext","url":"https://nagoya.repo.nii.ac.jp/record/24734/files/Iwai_2017_ApJL_841_L20.pdf"},"version_id":"c708f91d-c471-4dd3-896e-07fc4e33d1d0"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"ALMA Discovery of Solar Umbral Brightness Enhancement at λ=3mm","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ALMA Discovery of Solar Umbral Brightness Enhancement at λ=3mm","subitem_title_language":"en"}]},"item_type_id":"10","owner":"1","path":["881"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2017-09-05"},"publish_date":"2017-09-05","publish_status":"0","recid":"24734","relation_version_is_last":true,"title":["ALMA Discovery of Solar Umbral Brightness Enhancement at λ=3mm"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-01-16T04:45:30.002106+00:00"}