Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection
Abstract X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending o...
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Veröffentlicht in: | Publications of the Astronomical Society of Japan 2021-06, Vol.73 (3), p.504-518 |
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creator | Asakura, Kazunori Matsumoto, Hironori Okazaki, Koki Yoneyama, Tomokage Noda, Hirofumi Hayashida, Kiyoshi Tsunemi, Hiroshi Nakajima, Hiroshi Katsuda, Satoru Ishi, Daiki Ezoe, Yuichiro |
description | Abstract
X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations. |
doi_str_mv | 10.1093/pasj/psab015 |
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X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.</description><identifier>ISSN: 0004-6264</identifier><identifier>EISSN: 2053-051X</identifier><identifier>DOI: 10.1093/pasj/psab015</identifier><language>eng</language><publisher>OXFORD: Oxford University Press</publisher><subject>Astronomy & Astrophysics ; Physical Sciences ; Science & Technology</subject><ispartof>Publications of the Astronomical Society of Japan, 2021-06, Vol.73 (3), p.504-518</ispartof><rights>The Author(s) 2021. Published by Oxford University Press on behalf of the Astronomical Society of Japan. 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>6</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000671559500004</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c333t-59d776489d1fe1b3f63f7894b0b22d0926fb3ab8a8f9871ebde5f96d726303253</citedby><cites>FETCH-LOGICAL-c333t-59d776489d1fe1b3f63f7894b0b22d0926fb3ab8a8f9871ebde5f96d726303253</cites><orcidid>0000-0002-1104-7205</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,1585,27929,27930,39263</link.rule.ids></links><search><creatorcontrib>Asakura, Kazunori</creatorcontrib><creatorcontrib>Matsumoto, Hironori</creatorcontrib><creatorcontrib>Okazaki, Koki</creatorcontrib><creatorcontrib>Yoneyama, Tomokage</creatorcontrib><creatorcontrib>Noda, Hirofumi</creatorcontrib><creatorcontrib>Hayashida, Kiyoshi</creatorcontrib><creatorcontrib>Tsunemi, Hiroshi</creatorcontrib><creatorcontrib>Nakajima, Hiroshi</creatorcontrib><creatorcontrib>Katsuda, Satoru</creatorcontrib><creatorcontrib>Ishi, Daiki</creatorcontrib><creatorcontrib>Ezoe, Yuichiro</creatorcontrib><title>Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection</title><title>Publications of the Astronomical Society of Japan</title><addtitle>PUBL ASTRON SOC JPN</addtitle><description>Abstract
X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.</description><subject>Astronomy & Astrophysics</subject><subject>Physical Sciences</subject><subject>Science & Technology</subject><issn>0004-6264</issn><issn>2053-051X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>HGBXW</sourceid><recordid>eNqNkM9OAyEQh4nRxEZ78wG4edBVWAq7HE3jv8TEg5p428Du0FK3sIGttX0CH1s2bTwaL8wkfL9h-BA6o-SKEsmuOxUX111UmlB-gEY54SwjnL4fohEhZJKJXEyO0ThGq0kuZEFFwUbo-2W1VR8r3EAPdW-9w97g6FsV8Nq6BtdzFWaA4Ss1bmiWNk1ImAl-iRX-VMFCvxlSczubtxucLu0WmqFGbB1WLp09hK5VDnoVNrj2wTvV4qWKEcNi9-4pOjKqjTDe1xP0dnf7On3Inp7vH6c3T1nNGOszLpuiEJNSNtQA1cwIZopSTjTRed4QmQujmdKlKo0sCwq6AW6kaIpcMMJyzk7Q5W5uHXyMAUzVBbtMa1WUVIPIahBZ7UUm_GKHr0F7E2sLrobfSBIrCsq55GRwnOjy__TU9mr4-dSvXJ-i57uoX3V_r_QDw2mZiA</recordid><startdate>20210601</startdate><enddate>20210601</enddate><creator>Asakura, Kazunori</creator><creator>Matsumoto, Hironori</creator><creator>Okazaki, Koki</creator><creator>Yoneyama, Tomokage</creator><creator>Noda, Hirofumi</creator><creator>Hayashida, Kiyoshi</creator><creator>Tsunemi, Hiroshi</creator><creator>Nakajima, Hiroshi</creator><creator>Katsuda, Satoru</creator><creator>Ishi, Daiki</creator><creator>Ezoe, Yuichiro</creator><general>Oxford University Press</general><general>Oxford Univ Press</general><scope>BLEPL</scope><scope>DTL</scope><scope>HGBXW</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-1104-7205</orcidid></search><sort><creationdate>20210601</creationdate><title>Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection</title><author>Asakura, Kazunori ; Matsumoto, Hironori ; Okazaki, Koki ; Yoneyama, Tomokage ; Noda, Hirofumi ; Hayashida, Kiyoshi ; Tsunemi, Hiroshi ; Nakajima, Hiroshi ; Katsuda, Satoru ; Ishi, Daiki ; Ezoe, Yuichiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c333t-59d776489d1fe1b3f63f7894b0b22d0926fb3ab8a8f9871ebde5f96d726303253</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Astronomy & Astrophysics</topic><topic>Physical Sciences</topic><topic>Science & Technology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Asakura, Kazunori</creatorcontrib><creatorcontrib>Matsumoto, Hironori</creatorcontrib><creatorcontrib>Okazaki, Koki</creatorcontrib><creatorcontrib>Yoneyama, Tomokage</creatorcontrib><creatorcontrib>Noda, Hirofumi</creatorcontrib><creatorcontrib>Hayashida, Kiyoshi</creatorcontrib><creatorcontrib>Tsunemi, Hiroshi</creatorcontrib><creatorcontrib>Nakajima, Hiroshi</creatorcontrib><creatorcontrib>Katsuda, Satoru</creatorcontrib><creatorcontrib>Ishi, Daiki</creatorcontrib><creatorcontrib>Ezoe, Yuichiro</creatorcontrib><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Web of Science - Science Citation Index Expanded - 2021</collection><collection>CrossRef</collection><jtitle>Publications of the Astronomical Society of Japan</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Asakura, Kazunori</au><au>Matsumoto, Hironori</au><au>Okazaki, Koki</au><au>Yoneyama, Tomokage</au><au>Noda, Hirofumi</au><au>Hayashida, Kiyoshi</au><au>Tsunemi, Hiroshi</au><au>Nakajima, Hiroshi</au><au>Katsuda, Satoru</au><au>Ishi, Daiki</au><au>Ezoe, Yuichiro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection</atitle><jtitle>Publications of the Astronomical Society of Japan</jtitle><stitle>PUBL ASTRON SOC JPN</stitle><date>2021-06-01</date><risdate>2021</risdate><volume>73</volume><issue>3</issue><spage>504</spage><epage>518</epage><pages>504-518</pages><issn>0004-6264</issn><eissn>2053-051X</eissn><abstract>Abstract
X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.</abstract><cop>OXFORD</cop><pub>Oxford University Press</pub><doi>10.1093/pasj/psab015</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-1104-7205</orcidid></addata></record> |
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title | Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection |
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