Search Publications
The change of magnetic inclination angles associated with the X3.4 flare on December 13, 2006
Jing, Ju; Wang, Haimin; Tan, Changyi +1 more
Recent studies showed a consistent pattern of changes in the sunspot structure associated with major flares: part of the peripheral penumbral regions vanishes during flares, and meanwhile, the umbral cores and/or inner penumbral regions are darkened. To understand the underlying physics of these observations, we compare the magnetic inclination an…
A comparison of co-temporal magnetograms obtained with the Huairou magnetograph and the Spectro-Polarimeter on board Hinode
Zhang, Hongqi; Zhang, Mei; Li, Hui +1 more
We have compared a set of co-temporal magnetograms obtained with the Solar Magnetic Field Telescope (SMFT) of the Huairou Solar Observing Station (HSOS) and with the Spectro-Polarimeter of the Solar Optical Telescope (SP/SOT) on board Hinode to check the linear calibrations of SMFT vector magnetograms. The comparison shows that the currently used …
A new perspective on quiet Sun magnetism
Lites, Bruce William
The Hinode mission has provided us with a new, quantitative view of the magnetism of the quiet Sun. It has revealed that the quiet internetwork areas are blanketed by horizontal fields that appear at first sight to have more flux than the vertical fields resolved on the same 0.3″ size scale. These measurements point to the possibility that the hor…
Emergence and cancellation of small-scale magnetic flux in a quiet region
Zhang, Jun; Jin, Chunlan
This paper studies the relationship between the development of granules and emergence (cancellation) of magnetic flux at small spatial scales (∼1″) in a quiet region taken with the spectro-polarimeter (SP) of the Solar Optical Telescope (SOT) aboard the Hinode satellite. By examining 6 granular cell events, we have uncovered that a granular struct…
Observation of the lower hybrid waves near the three-dimensional null pair
Vaivads, A.; Andre, M.; Fu, Song +8 more
Magnetic reconnection is a fundamental process in plasma, which is thought to play important roles both in laboratory and natural plasmas through affecting magnetic topology, heating and accelerating particles. During an event on Oct. 1st, 2001, the Cluster tetrahedron circled around the magnetic reconnection region several times, and Xiao et al. …
The influence of the stray-light component in determining coronal temperature structures
Zhang, Mei; Hao, Juan
We use a few solar partial eclipse observations made by XRT/Hinode to estimate the influence of stray-light component in determining coronal temperature structures. Our analysis shows that the stray light will largely affect the estimation of coronal temperature and change the estimated temperature structure in one coronal hole region. The stray l…
The infrared spectral features of circumstellar envelope of evolved low- and intermediate-mass stars
Zhang, Ke; Jiang, Biwei
The circumstellar envelope of evolved stars of low- and intermediate-mass is an important site for dust formation. In comparison with the interstellar medium, they have more types of organics and different types of inorganics. Various infrared features in the circumstellar envelope can reveal the composition and abundance of dust, as well as the c…