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A Flare-type IV Burst Event from Proxima Centauri and Implications for Space Weather
Studies of solar radio bursts play an important role in understanding the dynamics and acceleration processes behind solar space weather events, and the influence of solar magnetic activity on solar system planets. Similar low-frequency bursts detected from active M-dwarfs are expected to probe thei...
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| Published in: | The Astrophysical journal 2020-12, Vol.905 (1), p.23 |
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| creator | Zic, Andrew Murphy, Tara Lynch, Christene Heald, George Lenc, Emil Kaplan, David L. Cairns, Iver H. Coward, David Gendre, Bruce Johnston, Helen MacGregor, Meredith Price, Danny C. Wheatland, Michael S. |
| description | Studies of solar radio bursts play an important role in understanding the dynamics and acceleration processes behind solar space weather events, and the influence of solar magnetic activity on solar system planets. Similar low-frequency bursts detected from active M-dwarfs are expected to probe their space weather environments and therefore the habitability of their planetary companions. Active M-dwarfs produce frequent, powerful flares which, along with radio emission, reveal conditions within their atmospheres. However, to date, only one candidate solar-like coherent radio burst has been identified from these stars, preventing robust observational constraints on their space weather environment. During simultaneous optical and radio monitoring of the nearby dM5.5e star Proxima Centauri, we detected a bright, long-duration optical flare, accompanied by a series of intense, coherent radio bursts. These detections include the first example of an interferometrically detected coherent stellar radio burst temporally coincident with a flare, strongly indicating a causal relationship between these transient events. The polarization and temporal structure of the trailing long-duration burst enable us to identify it as a type IV burst. This represents the most compelling detection of a solar-like radio burst from another star to date. Solar type IV bursts are strongly associated with space weather events such as coronal mass ejections and solar energetic particle events, suggesting that stellar type IV bursts may be used as a tracer of stellar coronal mass ejections. We discuss the implications of this event for the occurrence of coronal mass ejections from Proxima Cen and other active M-dwarfs. |
| doi_str_mv | 10.3847/1538-4357/abca90 |
| format | article |
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Similar low-frequency bursts detected from active M-dwarfs are expected to probe their space weather environments and therefore the habitability of their planetary companions. Active M-dwarfs produce frequent, powerful flares which, along with radio emission, reveal conditions within their atmospheres. However, to date, only one candidate solar-like coherent radio burst has been identified from these stars, preventing robust observational constraints on their space weather environment. During simultaneous optical and radio monitoring of the nearby dM5.5e star Proxima Centauri, we detected a bright, long-duration optical flare, accompanied by a series of intense, coherent radio bursts. These detections include the first example of an interferometrically detected coherent stellar radio burst temporally coincident with a flare, strongly indicating a causal relationship between these transient events. The polarization and temporal structure of the trailing long-duration burst enable us to identify it as a type IV burst. This represents the most compelling detection of a solar-like radio burst from another star to date. Solar type IV bursts are strongly associated with space weather events such as coronal mass ejections and solar energetic particle events, suggesting that stellar type IV bursts may be used as a tracer of stellar coronal mass ejections. We discuss the implications of this event for the occurrence of coronal mass ejections from Proxima Cen and other active M-dwarfs.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/abca90</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Coronal mass ejection ; Energetic particles ; Environmental monitoring ; Flare stars ; Galactic radio sources ; Gamma rays ; Habitability ; M dwarf stars ; Radio bursts ; Radio emission ; Red dwarf stars ; Solar corona ; Solar magnetic activity ; Solar radio bursts ; Solar radio flares ; Solar system ; Solar-planetary interactions ; Space weather ; Stellar activity ; Stellar coronal mass ejections ; Stellar coronas ; Stellar flares ; UV Ceti stars ; Weather</subject><ispartof>The Astrophysical journal, 2020-12, Vol.905 (1), p.23</ispartof><rights>2020. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Dec 01, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c445t-7152db22c8fbb08588b983c4d2e2fe8524f3fd545fad32bdb2f43e9f86eac5e3</citedby><cites>FETCH-LOGICAL-c445t-7152db22c8fbb08588b983c4d2e2fe8524f3fd545fad32bdb2f43e9f86eac5e3</cites><orcidid>0000-0001-5100-2354 ; 0000-0001-6295-2881 ; 0000-0002-0494-192X ; 0000-0002-9994-1593 ; 0000-0001-7891-8143 ; 0000-0003-2783-1608 ; 0000-0002-2686-438X ; 0000-0002-2155-6054 ; 0000-0001-6978-9765 ; 0000-0002-9583-2947 ; 0000-0002-6169-614X ; 0000-0002-9077-2025</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Zic, Andrew</creatorcontrib><creatorcontrib>Murphy, Tara</creatorcontrib><creatorcontrib>Lynch, Christene</creatorcontrib><creatorcontrib>Heald, George</creatorcontrib><creatorcontrib>Lenc, Emil</creatorcontrib><creatorcontrib>Kaplan, David L.</creatorcontrib><creatorcontrib>Cairns, Iver H.</creatorcontrib><creatorcontrib>Coward, David</creatorcontrib><creatorcontrib>Gendre, Bruce</creatorcontrib><creatorcontrib>Johnston, Helen</creatorcontrib><creatorcontrib>MacGregor, Meredith</creatorcontrib><creatorcontrib>Price, Danny C.</creatorcontrib><creatorcontrib>Wheatland, Michael S.</creatorcontrib><title>A Flare-type IV Burst Event from Proxima Centauri and Implications for Space Weather</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. 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We discuss the implications of this event for the occurrence of coronal mass ejections from Proxima Cen and other active M-dwarfs.</description><subject>Astrophysics</subject><subject>Coronal mass ejection</subject><subject>Energetic particles</subject><subject>Environmental monitoring</subject><subject>Flare stars</subject><subject>Galactic radio sources</subject><subject>Gamma rays</subject><subject>Habitability</subject><subject>M dwarf stars</subject><subject>Radio bursts</subject><subject>Radio emission</subject><subject>Red dwarf stars</subject><subject>Solar corona</subject><subject>Solar magnetic activity</subject><subject>Solar radio bursts</subject><subject>Solar radio flares</subject><subject>Solar system</subject><subject>Solar-planetary interactions</subject><subject>Space weather</subject><subject>Stellar activity</subject><subject>Stellar coronal mass ejections</subject><subject>Stellar coronas</subject><subject>Stellar flares</subject><subject>UV Ceti stars</subject><subject>Weather</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kM1LAzEQxYMoWKt3jwE9uprNRzd7rKXVQkHBot5CNpvglnYTk6zY_94sK3rR0zDD773hPQDOc3RNOC1uckZ4RgkrbmSlZIkOwOjndAhGCCGaTUjxegxOQtj0Ky7LEVhP4WIrvc7i3mm4fIa3nQ8Rzj90G6Hxdgcfvf1sdhLO0kV2voGyreFy57aNkrGxbYDGevjkpNLwRcv4pv0pODJyG_TZ9xyD9WK-nt1nq4e75Wy6yhSlLGZFznBdYay4qSrEGedVyYmiNdbYaM4wNcTUjDIja4KrhBpKdGn4REvFNBmDi8HWefve6RDFxna-TR8FpkVKWFLCE4UGSnkbgtdGOJ_y-L3IkeirE31Pou9JDNUlyeUgaaz79ZRuI0rERC4wEa42Cbv6A_vX9QuFDnyQ</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Zic, Andrew</creator><creator>Murphy, Tara</creator><creator>Lynch, Christene</creator><creator>Heald, George</creator><creator>Lenc, Emil</creator><creator>Kaplan, David L.</creator><creator>Cairns, Iver H.</creator><creator>Coward, David</creator><creator>Gendre, Bruce</creator><creator>Johnston, Helen</creator><creator>MacGregor, Meredith</creator><creator>Price, Danny C.</creator><creator>Wheatland, Michael S.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-5100-2354</orcidid><orcidid>https://orcid.org/0000-0001-6295-2881</orcidid><orcidid>https://orcid.org/0000-0002-0494-192X</orcidid><orcidid>https://orcid.org/0000-0002-9994-1593</orcidid><orcidid>https://orcid.org/0000-0001-7891-8143</orcidid><orcidid>https://orcid.org/0000-0003-2783-1608</orcidid><orcidid>https://orcid.org/0000-0002-2686-438X</orcidid><orcidid>https://orcid.org/0000-0002-2155-6054</orcidid><orcidid>https://orcid.org/0000-0001-6978-9765</orcidid><orcidid>https://orcid.org/0000-0002-9583-2947</orcidid><orcidid>https://orcid.org/0000-0002-6169-614X</orcidid><orcidid>https://orcid.org/0000-0002-9077-2025</orcidid></search><sort><creationdate>20201201</creationdate><title>A Flare-type IV Burst Event from Proxima Centauri and Implications for Space Weather</title><author>Zic, Andrew ; 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J</addtitle><date>2020-12-01</date><risdate>2020</risdate><volume>905</volume><issue>1</issue><spage>23</spage><pages>23-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><notes>Stars and Stellar Physics</notes><notes>AAS27735</notes><abstract>Studies of solar radio bursts play an important role in understanding the dynamics and acceleration processes behind solar space weather events, and the influence of solar magnetic activity on solar system planets. Similar low-frequency bursts detected from active M-dwarfs are expected to probe their space weather environments and therefore the habitability of their planetary companions. Active M-dwarfs produce frequent, powerful flares which, along with radio emission, reveal conditions within their atmospheres. However, to date, only one candidate solar-like coherent radio burst has been identified from these stars, preventing robust observational constraints on their space weather environment. During simultaneous optical and radio monitoring of the nearby dM5.5e star Proxima Centauri, we detected a bright, long-duration optical flare, accompanied by a series of intense, coherent radio bursts. These detections include the first example of an interferometrically detected coherent stellar radio burst temporally coincident with a flare, strongly indicating a causal relationship between these transient events. The polarization and temporal structure of the trailing long-duration burst enable us to identify it as a type IV burst. This represents the most compelling detection of a solar-like radio burst from another star to date. Solar type IV bursts are strongly associated with space weather events such as coronal mass ejections and solar energetic particle events, suggesting that stellar type IV bursts may be used as a tracer of stellar coronal mass ejections. 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| ispartof | The Astrophysical journal, 2020-12, Vol.905 (1), p.23 |
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| source | Free E-Journal (出版社公開部分のみ） |
| subjects | Astrophysics Coronal mass ejection Energetic particles Environmental monitoring Flare stars Galactic radio sources Gamma rays Habitability M dwarf stars Radio bursts Radio emission Red dwarf stars Solar corona Solar magnetic activity Solar radio bursts Solar radio flares Solar system Solar-planetary interactions Space weather Stellar activity Stellar coronal mass ejections Stellar coronas Stellar flares UV Ceti stars Weather |
| title | A Flare-type IV Burst Event from Proxima Centauri and Implications for Space Weather |
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