214 citations · 1.7k across the 53 of their papers we have counts for
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Evolution of Anemone AR NOAA 10798 and the Related Geo-Effective Flares and CMEs
Ayumi Asai, Kazunari Shibata, Takako T. Ishii +4
We present a detailed examination of the features of the Active Region (AR) NOAA 10798. This AR generated coronal mass ejections (CMEs) that caused a large geomagnetic storm on 24…
Characteristics of Anemone Active Regions Appearing in Coronal Holes Observed with {\it Yohkoh} Soft X-ray Telescope
Ayumi Asai, Kazunari Shibata, Hirohisa Hara +1
Coronal structure of active regions appearing in coronal holes is studied by using the data obtained with the Soft X-Ray Telescope (SXT) aboard {\it Yohkoh} from 1991 November to 1…
Strongly Blueshifted Phenomena Observed with {\it Hinode}/EIS in the 2006 December 13 Solar Flare
Ayumi Asai, Hirohisa Hara, Tetsuya Watanabe +5
We present a detailed examination of strongly blueshifted emission lines observed with the EUV Imaging Spectrometer on board the {\it Hinode} satellite. We found two kinds of blues…
Large-Amplitude Oscillation of an Erupting Filament as Seen in EUV, H-alpha and Microwave Observations
H. Isobe, D. Tripathi, A. Asai +1
We present multiwavelength observations of a large-amplitude oscillation of a polar crown filament on 15 October 2002. The oscillation occurred during the slow rise (about 1 km/s)…
Difference between Spatial Distributions of the H-alpha Kernels and Hard X-Ray Sources in a Solar Flare
Ayumi Asai, Satoshi Masuda, Takaaki Yokoyama +4
We present the relation of the spatial distribution of H-alpha kernels with the distribution of hard X-ray (HXR) sources seen during the 2001 April 10 solar flare. This flare was o…
Plasma Ejections from a Light Bridge in a Sunspot Umbra
Ayumi Asai, Takako T. Ishii, Hiroki Kurokawa
We present conspicuous activities of plasma ejections along a light bridge of a stable and mature sunspot in NOAA 8971 on 2000 May 02. We found the ejections both in the H-alpha (1…