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Activity Cycle of Polar Faculae

Kejun Li, Makoto Irie, Jingxiu Wang, Songying Xiong, Hongsik Yun, Hongfei Liang, Lashen Zhan and Haizhuan Zhao.

in Publications of the Astronomical Society of Japan

October 2002; p ublished online October 2002 .

Journal Article. Subjects: Solar Physics. 3706 words.

The data of the polar faculae observed by the National Astronomical Observatory of Japan from the year 1951 through 1991 and the Mount Wilson Observatory from 1906 to 1990 were analysed. We...

Analysis of Adiabatic Dipolar Oscillations of Stars

Masao Takata.

in Publications of the Astronomical Society of Japan

October 2006; p ublished online October 2006 .

Journal Article. Subjects: Astronomical Instrumentation, Methods, and Techniques; Solar Physics; Stars. 11428 words.

We theoretically discuss adiabatic dipolar oscillations of stars, fully taking into account the variation in the gravitational field. By suitably choosing the dependent variables, and using...

The Analysis of Penumbral Fine Structure Using an Advanced Inversion Technique

Jan Jurčák, Luis Bellot Rubio, Kiyoshi Ichimoto, Yukio Katsukawa, Bruce Lites, Shin’ichi Nagata, Toshifumi Shimizu, Yoshinori Suematsu, Theodore D. Tarbell, Alan M. Title and Saku Tsuneta.

in Publications of the Astronomical Society of Japan

November 2007; p ublished online November 2007 .

Journal Article. Subjects: Astronomical Instrumentation, Methods, and Techniques; Solar Physics. 4017 words.

We present a method to study the penumbral fine structure using data obtained by the spectropolarimeter on board Hinode. For the first time, the penumbral filaments can be considered as...

Asymmetrical Distribution of Sunspot Groups in the Solar Hemispheres

Ke-Jun Li, Xiao-Hua Liu, Hong-Sik Yun, Song-Ying Xiong, Hong-Fei Liang, Hai-Zhuan Zhao, La-Sheng Zhan and Xiao-Ma Gu.

in Publications of the Astronomical Society of Japan

August 2002; p ublished online August 2002 .

Journal Article. Subjects: Solar Physics. 3358 words.

In the present work, the north–south asymmetry of solar activity was examined by analyzing statistically the hemispheric distribution of annual numbers of sunspot groups, using the Royal...

Aurora candidates from the chronicle of Qíng dynasty in several degrees of relevance

Akito D. Kawamura, Hisashi Hayakawa, Harufumi Tamazawa, Hiroko Miyahara and Hiroaki Isobe.

in Publications of the Astronomical Society of Japan

October 2016; p ublished online August 2016 .

Journal Article. Subjects: Astronomy and Astrophysics; Planetary Systems; Solar Physics. 5998 words.

We present the result of a survey of sunspots and auroras in Qíngshǐgǎo (清史稿), a draft chronicle of Qíng dynasty, for the period of 1559–1912 CE. This is a sequel to a series of works...

Beryllium Abundances of Solar-Analog Stars

Yoichi Takeda, Akito Tajitsu, Satoshi Honda, Satoshi Kawanomoto, Hiroyasu Ando and Takashi Sakurai.

in Publications of the Astronomical Society of Japan

June 2011; p ublished online June 2011 .

Journal Article. Subjects: Solar Physics; Stars. 11098 words.

An extensive Be abundance analysis was conducted for 118 solar analogs (along with 87 FGK standard stars) by applying the spectrum synthesis technique to the near-UV region comprising the...

Ca II K Spectral Study of an Emerging Flux Region using the Domeless Solar Telescope in Hida Observatory

Kenichi Otsuji, Reizaburo Kitai, Takuma Matsumoto, Kiyoshi Ichimoto, Satoru UeNo, Shin’ichi Nagata, Hiroaki Isobe and Kazunari Shibata.

in Publications of the Astronomical Society of Japan

August 2010; p ublished online August 2010 .

Journal Article. Subjects: Solar Physics. 4343 words.

A cooperative observation with Hida Observatory and the Hinode satellite was performed on an emerging flux region. Successive Ca II K spectro-heliograms of the emerging flux region were...

Calibration and Data Processing for a Chinese Spectral Radioheliograph in the DecimeterWave Range

Wei Wang, Yihua Yan, Donghao Liu, Zhijun Chen, Cang Su, Fei Liu, Lihong Geng, Linjie Chen and Jing Du.

in Publications of the Astronomical Society of Japan

December 2013; p ublished online December 2013 .

Journal Article. Subjects: Solar Physics. 0 words.

The Chinese Spectral Radioheliograph (CSRH) is a solar-dedicated interferometric array with a frequency range from 400MHz to 15 GHz. There are 40 4.5m antennas with 400MHz to 2 GHz, and 60...

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Can High Frequency Acoustic Waves Heat the Quiet Sun Chromosphere?

Mats Carlsson, Viggo H. Hansteen, Bart De Pontieu, Scott McIntosh, Theodore D. Tarbell, Dick Shine, Saku Tsuneta, Yukio Katsukawa, Kiyoshi Ichimoto, Yoshinori Suematsu, Toshifumi Shimizu and Shin’ichi Nagata.

in Publications of the Astronomical Society of Japan

November 2007; p ublished online November 2007 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Solar Physics. 3752 words.

We use Hinode/SOT Ca II H-line and blue continuum broadband observations to study the presence and power of high frequency acoustic waves at high spatial resolution. We find that there is...

Can Superflares Occur on Our Sun?

Kazunari Shibata, Hiroaki Isobe, Andrew Hillier, Arnab Rai Choudhuri, Hiroyuki Maehara, Takako T. Ishii, Takuya Shibayama, Shota Notsu, Yuta Notsu, Takashi Nagao, Satoshi Honda and Daisaku Nogami.

in Publications of the Astronomical Society of Japan

June 2013; p ublished online June 2013 .

Journal Article. Subjects: Solar Physics; Stars. 6576 words.

Recent observations of Sun-like stars, similar to our Sun in their surface temperature (5600–6000 K) and slow rotation (rotational period [math] 10 d), using the Kepler satellite by Maehara...

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A Catalog of Suzaku/WAM Hard X-Ray Solar Flares

Akira Endo, Takashi Minoshima, Kouichi Morigami, Masanobu Suzuki, Atsushi Shimamori, Yumi Sato, Yukikatsu Terada, Makoto S. Tashiro, Yuji Urata, Eri Sonoda, Kazutaka Yamaoka, Satoshi Sugita and Kyoko Watanabe.

in Publications of the Astronomical Society of Japan

October 2010; p ublished online October 2010 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Astronomy and Astrophysics; Solar Physics. 4972 words.

We developed a catalog of solar flares in the hard X-ray band observed with the Wide-band All-sky Monitor (WAM) onboard the Suzaku satellite between 2005 July and 2009 November. During this...

Center-to-Limb Variation of Radio Emissions from Thermal-Rich and Thermal-Poor Solar Flares

Tomoko Kawate, Ayumi Asai and Kiyoshi Ichimoto.

in Publications of the Astronomical Society of Japan

December 2011; p ublished online December 2011 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Solar Physics. 3976 words.

A statistical analysis of radio flare events was conducted by using the event list of Nobeyama Radioheliograph in the years 1996–2009. We examined center-to-limb variations of 17 GHz and 34...

Center-to-Limb Variation of Stokes [math] Asymmetries in Solar Pores Observed with the Hinode Spectro-Polarimeter

Shuji Morinaga, Shin’ichi Nagata, Kiyoshi Ichimoto, Yoshinori Suematsu, Saku Tsuneta, Yukio Katsukawa, Toshifumi Shimizu, Richard A. Shine, Theodore D. Tarbell, Alan M. Title, Bruce Lites, Masahito Kubo and Takashi Sakurai.

in Publications of the Astronomical Society of Japan

November 2007; p ublished online November 2007 .

Journal Article. Subjects: Solar Physics. 2215 words.

Here we present spectro-polarimetric measurements of several pores and the surrounding regions taken with the Solar Optical Telescope aboard Hinode at various viewing angles. We analyzed...

Chromospheric Running Wave from a Solar Cyclone Produced through the Emergence of a Twisted Magnetic Flux Tube

Tetsuya Magara, Jun-Mo An, Hwanhee Lee, Jihye Kang, Satoshi Inoue and Gwangson Choe.

in Publications of the Astronomical Society of Japan

October 2012; p ublished online October 2012 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Solar Physics. 2286 words.

An innovative solar observing satellite, Hinode, has successfully observed the detailed evolution of an emerging magnetic field, starting from its appearance at the solar surface, to...

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Close Correlation among Hα Surges, Magnetic Flux Cancellations, and UV Brightenings Found at the Edge of an Emerging Flux Region

Keiji Yoshimura, Hiroki Kurokawa, Masumi Shimojo and Richard Shine.

in Publications of the Astronomical Society of Japan

February 2003; p ublished online February 2003 .

Journal Article. Subjects: Solar Physics. 4198 words.

Surge activities were observed at the edge of an emerging flux region. We studied the relations between the features around the surges in various data sets: magnetogram, [math], G-band, UV,...

Computation of the Adiabatic Eigenmodes of Stars Using the Riccati Method

Masao Takata and Wolfgang Löffler.

in Publications of the Astronomical Society of Japan

August 2004; p ublished online August 2004 .

Journal Article. Subjects: Astronomical Instrumentation, Methods, and Techniques; Solar Physics; Stars. 7664 words.

In stellar oscillation problems, it is often necessary to compute a large number of stellar eigenmodes with wildly varying radial orders and angular degrees. Conventionally the relaxation...

Contribution and Properties of the Green- and Red-Line Coronal Loops in the K-Corona

Aki Takeda, Hiroki Kurokawa, Reizaburo Kitai and Kiyomi Ishiura.

in Publications of the Astronomical Society of Japan

April 2000; p ublished online April 2000 .

Journal Article. Subjects: Astronomical Instrumentation, Methods, and Techniques; Solar Physics. 0 words.

A set of high-resolution images of corona obtained during the total solar eclipse on 1991 July 11, was carefully analyzed to investigate the properties of the loop structures observed in...

Cooperative Observation of Ellerman Bombs between the Solar Optical Telescope aboard Hinode and Hida/Domeless Solar Telescope

Takuma Matsumoto, Reizaburo Kitai, Kazunari Shibata, Shin’ichi Nagata, Kenichi Otsuji, Tahei Nakamura, Hiroko Watanabe, Saku Tsuneta, Yoshinori Suematsu, Kiyoshi Ichimoto, Toshifumi Shimizu, Yukio Katsukawa, Theodore D. Tarbell, Bruce W. Lites, Richard A. Shine and Alan M. Title.

in Publications of the Astronomical Society of Japan

June 2008; p ublished online June 2008 .

Journal Article. Subjects: Solar Physics. 3120 words.

High-resolution CaIIH broad-band filter images of NOAA10933 on 2007 January 5 were obtained by the Solar Optical Telescope aboard the Hinode satellite. Many small-scale ([math]1") bright...

Coronal Dimming Observed with Hinode: Outflows Related to a Coronal Mass Ejection

Louise K. Harra, Hirohisa Hara, Shinsuke Imada, Peter R. Young, David R. Williams, Alphonse C. Sterling, Clarence Korendyke and Gemma D. R. Attrill.

in Publications of the Astronomical Society of Japan

November 2007; p ublished online November 2007 .

Journal Article. Subjects: Solar Physics. 3339 words.

Coronal dimming has been a signature used to determine the source of plasma that forms part of a coronal mass ejection (CME) for many years. Generally dimming is detected through imaging...

Correlations between Flare Parameters and Magnetic Parameters in Solar Flares

Tetsuya T. Yamamoto and Takashi Sakurai.

in Publications of the Astronomical Society of Japan

February 2009; p ublished online February 2009 .

Journal Article. Subjects: Solar Physics. 6138 words.

We investigated correlations between flare parameters and magnetic parameters by picking up the largest and smaller flares in each sample region. The flare parameters that we used were the...