Three-minute Sunspot Oscillations Driven by Magnetic Reconnection in a Light Bridge
We report a different type of three-minute chromospheric oscillation above a sunspot in association with a small-scale impulsive event in a light bridge (LB). During our observations, we found a transient brightening in the LB. The brightening was composed of elementary bursts that may be a manifest...
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| Veröffentlicht in: | Astrophysical journal. Letters 2017-12, Vol.850 (2), p.L33 |
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| container_issue | 2 |
| container_start_page | L33 |
| container_title | Astrophysical journal. Letters |
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| creator | Song, Donguk Chae, Jongchul Kwak, Hannah Kano, Ryouhei Yurchyshyn, Vasyl Moon, Yong-Jae Lim, Eun-Kyung Lee, Jeongwoo |
| description | We report a different type of three-minute chromospheric oscillation above a sunspot in association with a small-scale impulsive event in a light bridge (LB). During our observations, we found a transient brightening in the LB. The brightening was composed of elementary bursts that may be a manifestation of fast repetitive magnetic reconnections in the LB. Interestingly, the oscillations in the nearby sunspot umbra were impulsively excited when the intensity of the brightening reached its peak. The initial period of the oscillations was about 2.3 minutes and then gradually increased to 3.0 minutes with time. In addition, we found that the amplitude of the excited oscillations was twice the amplitude of oscillations before the brightening. Based on our results, we propose that magnetic reconnection occurring in an LB can excite oscillations in the nearby sunspot umbra. |
| doi_str_mv | 10.3847/2041-8213/aa9a36 |
| format | Article |
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During our observations, we found a transient brightening in the LB. The brightening was composed of elementary bursts that may be a manifestation of fast repetitive magnetic reconnections in the LB. Interestingly, the oscillations in the nearby sunspot umbra were impulsively excited when the intensity of the brightening reached its peak. The initial period of the oscillations was about 2.3 minutes and then gradually increased to 3.0 minutes with time. In addition, we found that the amplitude of the excited oscillations was twice the amplitude of oscillations before the brightening. Based on our results, we propose that magnetic reconnection occurring in an LB can excite oscillations in the nearby sunspot umbra.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/aa9a36</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>Amplitudes ; Brightening ; Magnetic reconnection ; Oscillations ; Sun: chromosphere ; Sun: transition region ; Sun: UV radiation ; Sunspots</subject><ispartof>Astrophysical journal. Letters, 2017-12, Vol.850 (2), p.L33</ispartof><rights>2017. The American Astronomical Society. 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Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>We report a different type of three-minute chromospheric oscillation above a sunspot in association with a small-scale impulsive event in a light bridge (LB). During our observations, we found a transient brightening in the LB. The brightening was composed of elementary bursts that may be a manifestation of fast repetitive magnetic reconnections in the LB. Interestingly, the oscillations in the nearby sunspot umbra were impulsively excited when the intensity of the brightening reached its peak. The initial period of the oscillations was about 2.3 minutes and then gradually increased to 3.0 minutes with time. In addition, we found that the amplitude of the excited oscillations was twice the amplitude of oscillations before the brightening. Based on our results, we propose that magnetic reconnection occurring in an LB can excite oscillations in the nearby sunspot umbra.</description><subject>Amplitudes</subject><subject>Brightening</subject><subject>Magnetic reconnection</subject><subject>Oscillations</subject><subject>Sun: chromosphere</subject><subject>Sun: transition region</subject><subject>Sun: UV radiation</subject><subject>Sunspots</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAUx4MoOKd3jwHBk3X51TQ96vwJlYGb55C2yZbRpTVphf33tlTmRTy9x3uf73vwAeASo1sqWDIjiOFIEExnSqWK8iMwOYyODz2KT8FZCFuECOJYTMBytfFaRzvrulbDZedCU7dwEQpbVaq1tQvwwdsv7WC-h29q7XRrC_iui9o5XQwAtA4qmNn1poX33pZrfQ5OjKqCvvipU_Dx9Liav0TZ4vl1fpdFBWNJG2FDuKCEcRIXJiF5LDQzhhpdktRoxkxMMYoFz3GKypyqfoEZQRpjJnCOUjoFV-PdxtefnQ6t3Nadd_1LSSiPOScCJT2FRqrwdQheG9l4u1N-LzGSgzo5uJGDJzmq6yM3Y8TWze_Nf_DrP3DVbCspYiSJzCiVTWnoN6eue-E</recordid><startdate>20171201</startdate><enddate>20171201</enddate><creator>Song, Donguk</creator><creator>Chae, Jongchul</creator><creator>Kwak, Hannah</creator><creator>Kano, Ryouhei</creator><creator>Yurchyshyn, Vasyl</creator><creator>Moon, Yong-Jae</creator><creator>Lim, Eun-Kyung</creator><creator>Lee, Jeongwoo</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/0000-0002-2093-085X</orcidid><orcidid>https://orcid.org/0000-0002-5865-7924</orcidid><orcidid>https://orcid.org/0000-0001-9982-2175</orcidid><orcidid>https://orcid.org/0000-0001-8619-9345</orcidid><orcidid>https://orcid.org/0000-0001-6216-6944</orcidid><orcidid>https://orcid.org/0000-0002-7737-740X</orcidid><orcidid>https://orcid.org/0000-0002-7073-868X</orcidid><orcidid>https://orcid.org/0000-0002-7358-9827</orcidid></search><sort><creationdate>20171201</creationdate><title>Three-minute Sunspot Oscillations Driven by Magnetic Reconnection in a Light Bridge</title><author>Song, Donguk ; Chae, Jongchul ; Kwak, Hannah ; Kano, Ryouhei ; Yurchyshyn, Vasyl ; Moon, Yong-Jae ; Lim, Eun-Kyung ; Lee, Jeongwoo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c447t-1f268324625cf72b58e4ff3fed29fe44f5310586b190db3afed1420e11481b093</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Amplitudes</topic><topic>Brightening</topic><topic>Magnetic reconnection</topic><topic>Oscillations</topic><topic>Sun: chromosphere</topic><topic>Sun: transition region</topic><topic>Sun: UV radiation</topic><topic>Sunspots</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Song, Donguk</creatorcontrib><creatorcontrib>Chae, Jongchul</creatorcontrib><creatorcontrib>Kwak, Hannah</creatorcontrib><creatorcontrib>Kano, Ryouhei</creatorcontrib><creatorcontrib>Yurchyshyn, Vasyl</creatorcontrib><creatorcontrib>Moon, Yong-Jae</creatorcontrib><creatorcontrib>Lim, Eun-Kyung</creatorcontrib><creatorcontrib>Lee, Jeongwoo</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Song, Donguk</au><au>Chae, Jongchul</au><au>Kwak, Hannah</au><au>Kano, Ryouhei</au><au>Yurchyshyn, Vasyl</au><au>Moon, Yong-Jae</au><au>Lim, Eun-Kyung</au><au>Lee, Jeongwoo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Three-minute Sunspot Oscillations Driven by Magnetic Reconnection in a Light Bridge</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2017-12-01</date><risdate>2017</risdate><volume>850</volume><issue>2</issue><spage>L33</spage><pages>L33-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We report a different type of three-minute chromospheric oscillation above a sunspot in association with a small-scale impulsive event in a light bridge (LB). 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| subjects | Amplitudes Brightening Magnetic reconnection Oscillations Sun: chromosphere Sun: transition region Sun: UV radiation Sunspots |
| title | Three-minute Sunspot Oscillations Driven by Magnetic Reconnection in a Light Bridge |
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