OBSERVATIONAL EVIDENCE OF SAUSAGE-PINCH INSTABILITY IN SOLAR CORONA BY SDO /AIA
نویسندگان
چکیده
منابع مشابه
SDO/AIA Observation of Kelvin-Helmholtz Instability in the Solar Corona
We present observations of the formation, propagation and decay of vortexshaped features in coronal images from the Solar Dynamics Observatory (SDO) associated with an eruption starting at about 2:30UT on Apr 8, 2010. The series of vortices formed along the interface between an erupting (dimming) region and the surrounding corona. They ranged in size from several to ten arcseconds, and traveled...
متن کاملMicroflare Heating of a Solar Active Region Observed with NuSTAR, Hinode/XRT, and SDO/AIA
NuSTAR is a highly sensitive focusing hard X-ray (HXR) telescope and has observed several small microflares in its initial solar pointings. In this paper, we present the first joint observation of a microflare with NuSTAR and Hinode/XRT on 2015 April 29 at ∼11:29 UT. This microflare shows heating of material to several million Kelvin, observed in Soft X-rays (SXRs) with Hinode/XRT, and was fain...
متن کاملObservational Evidence of the Kink Instability in Solar Eruptions
Two lines of observational evidence are used to infer that the MHD helical kink instability is associated with solar eruptions. The sense of twist and writhe are determined in images of 7 erupting filaments obtained at 10830 Å, 1600 Å, 195 Å and 171 Å. In every case the sense of twist is the same as the sense of writhe, as required for a kink. From images in the soft X-ray and EUV spectrum, mea...
متن کاملDESAT: an SSW tool for SDO/AIA image de-saturation
Saturation affects a significant rate of images recorded by the Atmospheric Imaging Assembly on the Solar Dynamics Observatory. This paper describes a computational method and a technological pipeline for the de-saturation of such images, based on several mathematical ingredients like Expectation Maximization, image correlation and interpolation. An analysis of the computational properties and ...
متن کاملThe Spatio-temporal Evolution of Solar Flares Observed with Aia/sdo: Fractal Diffusion, Sub-diffusion, or Logistic Growth?
We explore the spatio-temporal evolution of solar flares by fitting a radial expansion model r(t) that consists of an exponentially growing acceleration phase, followed by a deceleration phase that is parameterized by the generalized diffusion function r(t) ∝ κ(t − t1), which includes the logistic growth limit (β = 0), sub-diffusion (β = 0–1), classical diffusion (β = 1), super-diffusion (β = 1...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2013
ISSN: 2041-8205,2041-8213
DOI: 10.1088/2041-8205/765/2/l42