{"_buckets": {"deposit": "166baecb-16e0-4653-85b1-76ea57109a48"}, "_deposit": {"id": "15880", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "15880"}, "status": "published"}, "_oai": {"id": "oai:soar-ir.repo.nii.ac.jp:00015880", "sets": ["1545"]}, "author_link": ["45992", "45993", "45994", "45995"], "item_1628147817048": {"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_6_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2007-05-10", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "1105", "bibliographicPageStart": "1093", "bibliographicVolumeNumber": "660", "bibliographic_titles": [{"bibliographic_title": "The Astrophysical Journal"}]}]}, "item_6_description_20": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "We present results from a survey of weak Mg II absorbers in the VLT/UVES spectra of 81 QSOs obtained from the ESO archive. In this survey, we identified 112 weak Mg II systems within the redshift interval 0.4 \u003c z \u003c 2.4 with 86% completeness down to a rest-frame equivalent width of W-r(2796) = 0.02 angstrom, covering a cumulative redshift path length of Delta Z similar to 77.3. From this sample, we estimate that the number of weak absorbers per unit redshift (dN/dz) increases from 1.06 +/- 0.04 at \u003c z \u003e = 1.9 to 1.76 +/- 0.08 at \u003c z \u003e = 1.2 and thereafter decreases to 1.51 +/- 0.09 at \u003c z \u003e = 0.9 and 1.06 +/- 0.10 at \u003c z \u003e = 0.6. Thus, we find evidence for an evolution in the population of weakMg II absorbers, with their number density peaking at z = 1.2. We also determine the equivalent width distribution of weak systems at \u003c z \u003e =0.9 and \u003c z \u003e = 1. 9. At 0.4 \u003c z \u003c 1.4, there is evidence for a turnover froma power law of the form n(Wr) proportional to W-r(-1.04) at Wr(2796) \u003c 0.1 angstrom. This turnover is more extreme at 1.4 \u003c z \u003c 2.4, where the equivalent width distribution is close to an extrapolation of the exponential distribution function found for strong Mg II absorbers. Based on these results, we discuss the possibility that some fraction of weak Mg II absorbers, particularly single cloud systems, are related to satellite clouds surrounding strong Mg II systems. These structures could also be analogs to MilkyWay high-velocity clouds. In this context, the paucity of high-redshift weak Mg II absorbers is caused by a lack of isolated clouds accreting onto galaxies during that epoch.", "subitem_description_type": "Abstract"}]}, "item_6_description_30": {"attribute_name": "資源タイプ（コンテンツの種類）", "attribute_value_mlt": [{"subitem_description": "Article", "subitem_description_type": "Other"}]}, "item_6_description_31": {"attribute_name": "フォーマット：mimeタイプ", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_6_description_5": {"attribute_name": "引用", "attribute_value_mlt": [{"subitem_description": "The Astrophysical Journal. 660:1093-1105 (2007)", "subitem_description_type": "Other"}]}, "item_6_link_3": {"attribute_name": "信州大学研究者総覧へのリンク", "attribute_value_mlt": [{"subitem_link_text": "Misawa, T", "subitem_link_url": "http://soar-rd.shinshu-u.ac.jp/profile/ja.ypchuUkV.html"}]}, "item_6_link_67": {"attribute_name": "WoS", "attribute_value_mlt": [{"subitem_link_text": "Web of Science", "subitem_link_url": "http://gateway.isiknowledge.com/gateway/Gateway.cgi?\u0026GWVersion=2\u0026SrcAuth=ShinshuUniv\u0026SrcApp=ShinshuUniv\u0026DestLinkType=FullRecord\u0026DestApp=WOS\u0026KeyUT=000246571300016"}]}, "item_6_publisher_4": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "The American Astronomical Society"}]}, "item_6_relation_48": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_name": [{"subitem_relation_name_text": "10.1086/512852"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://doi.org/10.1086/512852", "subitem_relation_type_select": "DOI"}}]}, "item_6_select_64": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_6_source_id_35": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0004-637X", "subitem_source_identifier_type": "ISSN"}]}, "item_6_source_id_39": {"attribute_name": "NII ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0004-637X", "subitem_source_identifier_type": "ISSN"}]}, "item_6_source_id_40": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AA00553253", "subitem_source_identifier_type": "NCID"}]}, "item_6_text_70": {"attribute_name": "wosonly keywords", "attribute_value_mlt": [{"subitem_text_value": "HIGH-VELOCITY CLOUDS; ABSORPTION-LINE SYSTEMS; II ABSORBERS; HIRES/KECK SPECTRA; REDSHIFT; GALAXIES; SPECTROSCOPY; MORPHOLOGIES; POPULATION; QSOS"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Narayanan,  A"}], "nameIdentifiers": [{"nameIdentifier": "45992", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Misawa,  T"}], "nameIdentifiers": [{"nameIdentifier": "45993", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Charlton,  JC"}], "nameIdentifiers": [{"nameIdentifier": "45994", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kim,  TS"}], "nameIdentifiers": [{"nameIdentifier": "45995", "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": "2015-09-28"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "ApJ_660_1093.pdf", "filesize": [{"value": "433.3 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_note", "mimetype": "application/pdf", "size": 433300.0, "url": {"label": "ApJ_660_1093.pdf", "url": "https://soar-ir.repo.nii.ac.jp/record/15880/files/ApJ_660_1093.pdf"}, "version_id": "b346f8ba-1d03-4ae0-a49e-7b71b7e97a27"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "galaxies : evolution", "subitem_subject_scheme": "Other"}, {"subitem_subject": "intergalactic medium", "subitem_subject_scheme": "Other"}, {"subitem_subject": "quasars : absorption lines", "subitem_subject_scheme": "Other"}]}, "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": "A survey of weak MgII absorbers at 0.4 \u003c z \u003c 2.4", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "A survey of weak MgII absorbers at 0.4 \u003c z \u003c 2.4", "subitem_title_language": "en"}]}, "item_type_id": "6", "owner": "1", "path": ["1545"], "permalink_uri": "http://hdl.handle.net/10091/10119", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2010-06-03"}, "publish_date": "2010-06-03", "publish_status": "0", "recid": "15880", "relation": {}, "relation_version_is_last": true, "title": ["A survey of weak MgII absorbers at 0.4 \u003c z \u003c 2.4"], "weko_shared_id": -1}