IIA Institutional Repository

First Imaging Observation of Standing Slow Wave in Coronal Fan Loops

Show simple item record

dc.contributor.author Pant, V
dc.contributor.author Tiwari, A
dc.contributor.author Yuan, D
dc.contributor.author Banerjee, D
dc.date.accessioned 2020-11-10T13:50:52Z
dc.date.available 2020-11-10T13:50:52Z
dc.date.issued 2017-09
dc.identifier.citation The Astrophysical Journal Letters. Vol. 847, No. 1, L5 en_US
dc.identifier.issn 2041-8205
dc.identifier.uri http://prints.iiap.res.in/handle/2248/6798
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/2041-8213/aa880f en_US
dc.description.abstract We observe intensity oscillations along coronal fan loops associated with the active region AR 11428. The intensity oscillations were triggered by blast waves that were generated due to X-class flares in the distant active region AR 11429. To characterize the nature of oscillations, we created time–distance maps along the fan loops and noted that the intensity oscillations at two ends of the loops were out of phase. As we move along the fan loop, the amplitude of the oscillations first decreased and then increased. The out-of-phase nature together with the amplitude variation along the loop implies that these oscillations are very likely to be standing waves. The period of the oscillations is estimated to be ∼27 minutes, damping time to be ∼45 minutes, and phase velocity projected in the plane of sky to be ∼65–83 km s−1 . The projected phase speeds were in the range of the acoustic speed of coronal plasma at about 0.6 MK, which further indicates that these are slow waves. To the best of our knowledge, this is the first report on the existence of the standing slow waves in non-flaring fan loops. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Sun: corona en_US
dc.subject Sun: oscillations en_US
dc.subject Sun: UV radiation en_US
dc.title First Imaging Observation of Standing Slow Wave in Coronal Fan Loops en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account